COMET U0110M IoT Wireless Temperature Datalogger User Guide

COMET U0110M IoT Wireless Temperature Datalogger

Product Information

COMET SYSTEM Datalogger with 2G/4G Modem
The COMET SYSTEM Datalogger is a portable device designed for autonomous measurements and recording of physical and electrical data. It supports a data recording interval from 1 second to 24 hours. The inputs and ranges of measured quantities are determined by the model type.

Supported Models

• U0110M
• U0121M
• U0141M
• U0141TM
• U0843M
• U3120M
• U3121M
• U3631M
• U4440M
• U5841M
• U6841M
• U7844M
• U8410M
• U0110G
• U0121G
• U0141G
• U0141TG
• U0246G
• U0843G
• U3120G
• U3121G
• U3631G
• U4440G
• U5841G
• U6841G
• U7844G
• U8410G

Safety Measures and Unauthorized Manipulations
It is important to follow safety measures and avoid any unauthorized manipulations of the device. Any changes made to the device without explicit consent from COMET SYSTEM, s.r.o. may void the warranty.

Contact Information

For any queries or support regarding the device, please contact:

COMET SYSTEM, s.r.o.

Bezrucova 2901

756 61 Roznov pod Radhostm

Czech Republic

www.cometsystem.com

Product Usage Instructions

Installation and Setup

1. Insert the SIM card into the device.
2. Install the datalogger and place the probes.
3. Set up the device using a PC with a USB interface.
4. Run the device.
5. Follow the device disposal procedure when necessary.

Operating the Datalogger from the Keypad
To operate the datalogger using the keypad:

• Display the device data.
• Select menu options for various functions.

Setting Up the Device
To set up the device using a program:

1. Connect the device to a PC.
2. Use the program to configure the device settings.

Application Notes
Refer to the provided application notes for additional information and guidance on using the device.

Recommendations for Operation and Maintenance
Follow the recommendations provided for optimal operation and maintenance of the device.

Technical Parameters

Refer to the technical parameters section for detailed specifications of the device.

Annexes
Additional information and resources can be found in the annexes section of the user manual.

www.cometsystem.com

User’s Guide

For datalogger
with 2G modem
U0110M U0121M U0141M U0141TM
U0843M U3120M U3121M U3631M U4440M U5841M U6841M U7844M U8410M

with 2G/4G modem
U0110G U0121G U0141G U0141TG U0246G U0843G U3120G U3121G U3631G U4440G U5841G U6841G U7844G U8410G

© Copyright: COMET SYSTEM, s.r.o.
This User’s Guide may not be copied, and its contents may not be changed in any way without explicit consent of COMET SYSTEM, s.r.o. All rights reserved.
The COMET SYSTEM, s.r.o. company is continuously developing and improving its product. COMET SYSTEM, s.r.o. reserves the right to carry out technical changes in equipment or product without any previous notice.
Contact address of this device’s producer:
COMET SYSTEM, s.r.o. Bezrucova 2901 756 61 Roznov pod Radhostm Czech Republic www.cometsystem.com

Introduction

This datalogger is designed for autonomous measurements and recording of physical and electrical data, with the data recording interval from 1 s to 24 h. The inputs and ranges of measured quantities are determined by the model type the user has bought. The user cannot modify them. This portable device can also be mounted. To set up datalogger, a PC with a USB interface is needed.
This device allows:
– to measure and process input data coming from internal or external sensors, binary inputs, counters, or current inputs,
– to detect and log minimum and maximum values (existing since their last manual resetting) of each quantity,
– to display the measured values on an LCD display. Some features can be controlled by two push buttons situated next to the display (device switching off and on, deactivation of alarm signalling, Min/Max value resetting),
– to store an autonomous chronological record of measured values in internal non-volatile memory. The values to be collected can be measured at the instant of recording or as average or min/max values detected during the recording interval. Recording can be performed continuously or at the alarm time only. The recording mode can be also set optionally as non-cyclic to stop at the memory filling up, or as cyclic. In this mode the originally recorded values will be overwritten by fresh ones after the memory unit getting filled up.
– via the mobile operator’s network, to send SMS messages to up to four selected recipients and JSON data messages to the COMET Cloud Internet storage (optionally to your own storage). UxxxxM series dataloggers contain a 2G (GSM) modem, UxxxxG series dataloggers contain a combined 2G/4G (GSM and LTE) modem.
– to set up two alarm signalling limits for each measured quantity. The alarm signalling can be realised visually, optionally by a symbol appearing on the display or by a short blink of an LED, or acoustically. When the alarm status changes, alarm SMS messages and/or JSON data messages can be sent to the Internet storage.
– send the measured values via a data connection to the Internet storage at an adjustable interval using JSON messages (more specification of format is available on request from the manufacturer)
– to send, at a configurable interval, informative SMS messages containing device identification, currently measured values, and alarm states to up to four selected receivers. These messages may be of two kinds: user readable (suitable to be displayed on a mobile phone), or machine readable (suitable for automated data processing in a database or a cloud).
– autonomous power supply from the internal Li-Ion battery, its charging is possible using a standard USB charger. The internal radio modem is connected to the power supply only when there is a request to send data to the Cloud or send an SMS, otherwise it is switched off to save energy.
– to communicate with a computer by means of a USB interface (all device settings, recorded data downloading, and online monitoring). To communicate, the datalogger utilises the HID USB standard, which does not require additional controllers to be built into the PC.

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Dataloggers UxxxxM and UxxxxG

Overview of models and measured quantities

Explanations:

Ti……… Internal temperature

P…….. Barometric pressure

Te…….. External temperature

CO2….CO2 concentration

Tdiff….. Temperature difference

U…….. Voltage

Td…….. Dew point temperature

I……… Current

Tc…….. Thermocouple

BIN…. Binary input

RH……. Relative humidity

cc……… Calculated channel, i.e., the channel that can be used to calculate and record the value

calculated from the measured quantities according to the selected formula

Device type
U0110M U0110G
U0121M U0121G
U0141M U0141G
U0141TM U0141TG

Measured quantity Ti 2x Te + Tdiff + 1x cc 4x Te + 2x cc 4x Te + 2x cc

U0246G 3x Tc + 1x Te + 1x Ti + 2x cc

U0843M U0843G
U3120M U3120G
U3121M U3121G
U3631M U3631G
U4440M U4440G
U5841M U5841G
U6841M U6841G U7844M U7844G

2x Te + Tdiff + 2x BIN + 1x cc Ti + RH + Td + 1x cc Te + RH + Td + 1x cc Ti + Te + RH + Td + Tdiff + 1x cc Ti + RH + Td + P + CO2 + 1x cc 3x U + 1x BIN + 3x cc 3x I + 1x BIN + 3x cc 4x BIN or 3x BIN + 1x counter or 2x BIN + 2x counter

Construction

Internal temperature sensor
Connectors for two external Pt1000/E probe connection
Connectors for up to four external Pt1000/E probe connection Two-part WAGO terminal block for up to four external Pt1000/0 wire leads probe connection Two-part WAGO terminal block for connection up to three thermocouples and one external Pt1000/0 probe Two-part WAGO terminal block for connection of two external Pt1000/0 probe and two binary inputs
Internal temperature and relative humidity sensor
Connector for an external Digi/E probe connection
Internal temperature, relative humidity sensor and connector for Pt1000/E probe connection Internal sensors of temperature, relative humidity, barometric pressure and CO2 concentration Two-part WAGO terminal block for connection of three voltage inputs 0-10 V and one binary input Two-part terminal block for connection of three current inputs 0-20 mA and one binary input Two-part WAGO terminal block for connection of four binary inputs, up to two of them can work as a counter

U8410M CO2 U8410G

Internal sensor of CO2 concentration

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UxxxxM and UxxxxG series model

(U0141M, U0141G models)

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Safety measures and unauthorized manipulations
Read the following safety directions carefully before putting the device into operation. Follow these instructions when using the device!
· Legislative conditions. This datalogger contains a radio transmitter working in GSM, and LTE frequency bands and using power values that are shown in its “Technical parameters”. These bands and power values are used in the countries of the European Union. Before the first setting the device in operation make sure that you are allowed to operate the device if you reside in a locality outside the EU.
· Electromagnetic interference. Do not use the device in an area where the usage of mobile phones is limited, e. g. near sensitive medical apparatus, on board a plane or in localities where explosive materials are used.
· Operating and storage conditions. Observe the recommended operating and storage condition as quoted in the “Technical parameters”. This datalogger makes use of an internal Liion rechargeable battery. Pay attention to the device is not exposed to temperatures higher than 60 °C. Do not expose the device to direct radiation of heat sources and sun.
· Fire and explosion hazard. It is not allowed to use this datalogger within hazardous areas, especially those endangered by a potential explosion of combustible gases, vapours or dust.
· Device cover. Do not operate the datalogger without the cover. After inserting the SIM card check the integrity of the sealing. Screw the device together by using the original screws. Proceed always exactly according to instructions that are given later in this User’s guide.
· Aggressive surroundings. Do not expose this device to any kind of aggressive surroundings, to chemicals or mechanical shocks. Use soft tissue for cleaning. Do not apply solvents or similar aggressive agents.
· Battery damage. Should the battery casing get damaged or should the whole device get destroyed, carry it outside the fire, high temperature or water affected area to a safe fire-protected place. Protect yourself and the environment against escaping gases and against being soiled with the battery electrolyte.
· Failures and servicing. Do not try to repair the device yourself. Any repairs including battery exchange may be carried out by suitably instructed service personnel only. If the device shows signs of unusual behaviour, screw off the rear cover to disconnect the battery connector. Avoid the removed battery contacting any metallic parts. Contact the distributor you have bought the device from.
· Battery charging. Use the charger that has been recommended to charge the rechargeable battery. During the charging procedure the device must be located in an indoor room with a relative humidity (RH) up to 85 %. The charging will proceed at an indoor temperature ranging between 0°C and +40°C.
· Protection against water and dust. The device will be protected against water and dust only when all connectors are duly tightened, and the USB connector is provided with a closing cap. The input connectors that are not used have also to be provided with closing caps.
· Serviceability. This device uses wireless communication via the mobile operator’s networks. For this reason, the connection (SMS, data, etc.) cannot be guaranteed always and under any circumstances. Do not rely merely on wireless equipment if crucial communications must be realized (rescue systems, safety systems). Bear in mind that redundancy is indispensable for systems featuring high functional reliability. See e.g. IEC 61508 for more information.
· Recommended accessories. Use only accessories that are recommended by the producer.

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Guide to installation and usage of the device
Inserting the SIM card into the device
· Prepare suitable SIM card ­ depending on the intended use, prepare a suitable SIM card that will meet the expected amount of sent SMS messages and transmitted data. The transmitted data can be sent through data connection. Approximate data consumption is 1.5kB for each sent data message when sending via HTTP (if you use HTTPS, it increases to 8.5kB per message).
· Use the micro SIM card and insert it into the device. If you have a nano SIM card, you must purchase a micro SIM adapter. If the SIM card is protected by PIN code, make a note it, and later insert this code into the device configuration. Select such a tariff that meets your requirements concerning the quantity and safety of the message delivery. For some tariffs the message delivery may be stopped when a certain number of messages or amount of transferred data is exceeded or when a given time period has elapsed.
· If you use the optional IoT SIM card accessory (order code LP105), you get the option of a mobile connection to send data to the COMET Cloud. With this card it is possible to transfer 500 MB of data, i.e. the endurance of this SIM card is approximately 5 years at a 10-minute sending interval (possibly 2.5 years at a 5-minute sending interval). Attention, this IoT SIM card does not support sending of SMS messages!
· Make sure the device is turned off or turn it off.
· Screw off the rear cover of the device ­ caution, the device is constantly supplied from the internal battery. Proceed with care. Prevent external conductive parts from contacting electronics components when manipulating the device without the back cover installed.

· Insert the card into the SIM card holder

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· Remove the card from the SIM card holder

· Screw up the rear cover of the device at first check the seal in the nut for integrity, then screw down the lid with the aid of four self-cutting screws. ATTENTION ­ tighten screws gradually and with feeling!

The radio module status (blue LED indication)

For UxxxxM models:

LED state Off 64ms On / 800ms Off 64ms On / 2000ms Off 64ms On / 600ms Off

Module status The module is not running The module is not synchronized with network The module is synchronized with network The data transmission after dialling the PPP connection

For UxxxxG models: – using a 2G network (GSM modem):

LED state ON 200ms On / 200ms Off 800ms On / 800ms Off Off

Module status Searching Network Data Transmit Registered network Power off

– using a 4G network (LTE modem):

LED state

Module status

ON 200ms On / 200ms Off Off

Searching Network Data Transmit / Registered Power off

Installing the datalogger, placing the probes

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· Choose a suitable location for installing the device – bear in mind that the environmental conditions should be concordant with the “Operating conditions”. Do not situate the device near sources of electromagnetic interference, do not expose it to direct sunlight and adverse weather conditions.
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· Recommended working position ­ the antenna should be directed upwards. Pay extra attention to the U0246G device, where an inappropriate working position can affect the accuracy of the measurement.
· Check the availability and quality of the mobile signal at the antenna location use a mobile phone utilizing a SIM card of the same operator as that of the datalogger. Search another installation location if the signal quality is not satisfactory. It is especially in iron concrete constructions, cellars, metal chambers or other shielded rooms that the signal of mobile provider may be insufficient.
· This device may be operated as a portable one. In this kind of operation avoid the device falling. Try to maintain the proper working position.
· You can screw the device on the wall or some other solid base.
· You can fix the device on the wall with the aid of a lockable holder LP100 (optional accessory).

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· Probe installation and cable routing – observe the installation instructions, realize the recommended operating positions, avoid electricpower distribution systems. See the chapter “Models produced” for more information.
· The front panel of the device is protected by a transparent transport foil. Remove it after installing the device.
Device set-up
· Connect the appropriate probes and signal leads to the device. For more information refer to the chapter “Models produced”.
· Install the COMET Vision software into your computer – is available for free on the address www.cometsystem.com.
· Run COMET Vision software. · Connect the device to the computer – on the datalogger side, use
a USB cable with USB-C connector. · Setting up the device – with the aid of the COMET Vision program, set
up the device identification, the names of the points to be measured, the recording mode, the alarms and there signalling. If a PIN code is set on your SIM card, be sure to set it in the Configuration-Modem-General section before using the logger for the first time, the default setting is No PIN code. · For more information, refer to the chapter “Setting up the device”.

Running the device

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· After the set-up ­ Disconnect the device from the computer and close the USB connector with a closing cap. Check that all connectors, including the antenna connector are properly tightened. The device may be operated with a USB cable that is permanently connected to a computer or to a charger. In this case the ingress protection will be reduced to IP 20.
· Operating the device by means of keys ­ In the main display mode you can switch over between individual channels and the display mode Current / minimum / maximum values by means of the keys. By pressing a certain key combination, you will enter a menu in which you will be able to switch the device on or off, to delete the Min/Max values and to disable the alarm signalling. For more information, refer to the chapter “Operating the datalogger from the keypad”.
· Charging the batteries ­ an internal charger will be activated immediately after connecting the USB charger or after connecting the datalogger to the computer. The datalogger contains an intelligent charging circuitry evaluating the battery condition and internal
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temperature. Charging time depends on the current battery discharge status The battery charging process will be initiated only in the case that the battery voltage is low and the internal temperature ranges between 0°C and 40 °C. Use the recommended charger type only. During the charging period the ingress protection is reduced to IP 20; therefore, do the charging under room (or similar) conditions only. If the battery is very low, the charging process may be terminated with an error message. In such a case contact the datalogger vendor to apply for battery replacement. During the battery charging period the internal temperature of the device may be slightly raised, which can, for a short period of time, adversely influence the measurement values of the internal sensors. Therefore, the charging speed with the power on is deliberately slowed down to avoid excessive measurement influence. If you want to charge the device as soon as possible, turn it off first. When the device is turned off, the fast charging mode is automatically activated. Fully charged battery is indicated on the display of the device usually within 6 hours.
· Maintenance and regular checks ­ for a reliable functioning of the device it is advisable to perform its regular check-ups. For more details refer to “Recommendations for operation and maintenance”.
Device disposal procedure
Screw-off the rear cover of the datalogger, disconnect the battery connector and take out the battery. The device is disposed of as electronic waste. The battery must be disposed of as hazardous waste. Remember there can be a SIM card inside the device.

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Operating the datalogger from the keypad
Displaying the device data

Data memory occupancy ­ this display section offers information about the current condition of the free space existing in the data memory. The blinking of the Memory symbol indicates that the preset memory occupancy limit has been exceeded. This limit can be set up in the device’s configuration. Several actions can be assigned to it (optical and acoustic signalling, sending SMS messages).
The memory occupancy is about 75 %, the device is in the noncyclic recording mode, i.e. the recording will be stopped as soon as the memory capacity is full.
The memory occupancy about 75 %, the device is in the cyclic recording mode, i.e. as soon as the memory capacity is full, the oldest data will be overwritten.
The memory occupancy 100 %, the device is in the cyclic recording mode. The preset memory occupancy limit has been exceeded (The Memory symbol is blinking).
Record status ­ offers information on whether the recording is ON and whether it is just running.

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A continuous recording with a preset interval is ON and running.
The recording is ON in the device and it is running at present. This kind of display is only used, when the recording activity is dependent on the alarm or the external input condition.
The recording is ON in the device but it is not running at present. For instance, the rrecording is ON during an alarm only, and there is no alarm just now. Or, a recording is ON that is controlled by an external input which not active at the moment.
The LOG symbol is not displayed: The recording is OFF in the device. The recording is not allowed in any channel in the device’s configuration.
Meaning of the values displayed ­ this item specifies the meaning of the measured values displayed in the two main rows. Beside the currently measured values the device will also evaluate the minimum and maximum values from their last resetting by the user. If the device is OFF and has not been running for some time, then, after it is turning ON, the value of Min / Max is then set to the values before switching OFF. It can be preset in the device configuration, whether and in what manner these Min/Max values will be displayed by the device. Remember that the Min/Max in question are different from those being recorded.
Neither MIN nor MAX is displayed. You can see values that have been currently measured.
In both display rows you can see the minimum values measured since their last resetting by the user.
In both display rows you can see the maximum values measured since their last resetting by the user.
Alarm condition ­ this item provides instant information that at least one of the alarms which have been preset is active. Alarms can be generated by exceeding the limits that have been preset in individual channels. Moreover, they can notify of a device failure. In the device configuration you can preset which conditions should be considered as alarm generating. By means of the upper key you can easily browse through the values measured in all device channels (if enabled in device configuration). In the case that the value is preceded by a bell-like icon, the preset limits (alarms) have been exceeded in this channel.
Radio modem active ­ this symbol indicates that a power supply has been connected to the radio modem because of some online work.

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Battery condition ­ this symbol provides overview information about the current battery charging condition. The charging is indicated by flashing one of these symbols.
Battery conditions during battery operation of the device:
Fully charged battery
Partly discharged battery
Heavily discharged battery
Totally discharged battery, the device will be switched OFF.
Battery conditions with a charger connected to the battery:
Blinking symbol of an empty battery. There was a deep discharge of the battery, the charger is attempting to recover battery. If this condition persists for a long time and the standard charging process is not renewed, contact your service department. The battery will have to be replaced.

Indications of individual charging steps when the charging process takes place in a standard way. If the display shows the symbol of a full battery, the battery is fully charged and the charger can be disconnected.

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A failure has been detected during charging and the charging process has been broken off. Try to remove the failure by disconnecting and reconnecting the charger. If the problem persists, call the service.
Wait, the charger performs internal testing, or the temperature inside the device is not within the allowed charging range (0 to 40°C).
USB interface active ­ the icon indicates that the device has been connected to the computer.
Measured value (upper and lower row) ­ the currently measured value(s) (or the Min/Max values) are displayed if the corresponding symbols in the upper display section are illuminated. The unit name and the measured value symbol (1, 2, 3, 4, INT, EXT) are preset by the manufacturer, the user cannot change them. In addition, it is factory preset whether the measured value of a particular channel will be displayed in the lower or upper display unit row. On the other hand, the user has many possibilities to adjust the appearance and behaviour of individual “screens”. Controlling them can take place only manually by the aid of push buttons situated beside
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the display unit. The upper push button serves to toggle between the measured values (“the screens”):
The lower push button serves to toggle between the currently measured values and the Min/Max values:
The device can also be set up to toggle the “screens” automatically, in for about 5 sec interval. The cycle can be interrupted by pressing a key. If you do not want to use the keypad, you can disable it in the device settings. Display warnings:
Displayed when no SIM card is inserted.
Displayed if the card requires you to enter the PUK code. This condition may occur e.g. if a PIN is activated on the SIM, but PIN code stored in the device configuration is not valid.
The SIM card requires a PIN code, but the PIN is not set/enabled in the SW configuration (Default).

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Menu Options
The menu can be entered by pressing a combination of both keys. In any case, using the keypad must be enabled in the device configuration. Individual menu items, too, may be disabled in the device setup. It is e. g. possible to switch on the device in this way, but it is not possible to switch it off.
To enter the menu: Press the lower key and hold it pressed for about 3 s, until bottom menu line appeared. Then release this key immediately and shortly press the upper key during the following 4 s.:
You can now work with individual menu items. Press the upper key to scroll through the menu items, press the lower key to confirm (SET). After confirming certain choices, the menu will be quit automatically. If the keypad is inactive for more than 20 s, the menu will close automatically.
Menu items:
Deactivation of the optical (LED diode) and/or acoustic (the intermittent tone) alarm signalling. The option “Mute optical and/or acoustic signalling are controlled from local keypad” must be enabled in the device configuration. If you deactivate (mute) the signalling (optical and/or acoustic) using the device keypad, the signalling is automatically reactivated when another alarm occurs. See “Mute of signaling” for more details. Deleting the Min/Max values in the device and it is related only to values obtained since last reset. This does not concern those recorded Min/Max values obtained in some other way. Option must be enabled in the SW device configuration. Switching the device off. This item is available only if the device is ON. Option must be enabled in the SW device configuration. Device switching-on. This item is available only if the device is OFF. Option must be enabled in the SW device configuration. Closing the menu.

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Models produced

The models produced differ from one another by types and ranges of values to be measured. The datalogger’s input channels are invariably assigned to these values. The user cannot change the measured quantities and their ranges. If wireless communication is used, it is necessary to pay attention to a sufficient level of mobile signal at the location.

U0110M, U0110G

One-channel thermometer
This model is equipped with only one internal temperature sensor, no additional probes and sensors can be connected. It is characterized by a simple and compact design and a relatively long response to a temperature change. The device is placed directly in the measured area. During the charging period the measurement accuracy may be affected by up to 1 °C due to parasitic heat.

U0121M, U0121G

Two-channel thermometer for external probes
This model can measure one or two temperatures, which are sensed by Pt1000/E series external probes. The response to a temperature change depends on the connected probe design. As a rule, this model is few times faster than that using the internal sensor. It is often used to monitor locations where the device itself is not directly in the measuring space and only probes are in. The maximum length of each probe lead should not exceed 15 m. It is recommended to use shielded cables. To maintain the IP rating, the unused probe connectors should be provided with a supplied closing cap.

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U0141M, U0141TM, U0141G, U0141TG

U0141M U0141G

Four-channel thermometer for external probes

U0141TM U0141TG

These devices measure up to four temperatures from external probes of the Pt1000 series. The response to a temperature change depends on the connected probe design but it is usually many times faster than a model with an internal sensor. It is often used to monitor places where only probes are introduced, when the device itself is not directly in the measured area. The maximum cable length of each probe should not exceed 15 m. The use of shielded cables is strongly recommended.
The U0141M, U0141G models have a high degree of IP67 protection and probes with the connector (Pt1000/E) can be connected to them. To maintain the IP rating, the unused probe connectors should be provided with a supplied closing cap.
The U0141TM, U0141TG models have a low degree of protection IP20. The connectorless probes Pt1000/0 series are intended to these models. This type of device has not a protection against the ingress of water or dust. Do not use device at places where such conditions can be expected. The probes are connected to the pluggable terminal block.
Connection:

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The procedure for connecting the wires to the terminals can be found in Annex 4.
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U0246G
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Datalogger with 3 inputs for thermocouples and 1 input for external probe Pt1000
This model has three ±70 mV DC voltage inputs with support for temperature measurement using basic types of thermocouples, an external probe of the Pt1000/0 series can be connected to the fourth input. The device also measures the internal temperature. The inputs are not galvanically isolated from each other. Make sure that neither the probe wires, nor the thermocouples are electrically connected to any other conductive elements! Any electrical connections between thermocouples can cause serious measurement errors or unstable values! For correct measurement, it is necessary that there are no rapid temperature changes around the device. Avoid installing the device in places where the temperature is not stable due to air flow, sunlight, or other heat sources. During the charging period the measurement accuracy may be affected by up to 1 °C due to parasitic heat.
Supported thermocouple types (wire marking according to ANSI):

Thermocouple type
K (NiCr-Ni) J (Fe-Co) S (Pt10%Rh-Pt) B (Pt30%Rh-Pt) T (Cu-CuNi) N (NiCrSi- NiSiMg)

Wire colour +
Yellow White Black Black Blue Orange

Wire colour –
Red Red Red Red Red Red

The input signals are connected to the pluggable terminal block. The device has IP20 protection. The device has not a protection against the ingress of water or dust. Do not use device at places where such conditions can be expected. The maximum length of the wires to the inputs must not exceed 15 m. It is recommended to use shielded cables.

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Connection:

The procedure for connecting the wires to the terminals can be found in Annex 4.

U0843M, U0843G
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Two-channel binary-input thermometer for external probes
This model can measure up to two temperature values, which are sensed by external Pt1000/0 series probes. In addition, it is provided with two binary inputs for monitoring voltage-signal changes or changes of a signal coming from a dry contact. The binary input changes are registered immediately, irrespectively of the recording interval setting. To safe record the input status, the signal must be present for at least 1 s. Binary inputs of this device are not able to capture connected/disconnected voltage status. Input signals are connected to a pluggable terminal block. The response to a temperature change depends on the probe design. As a rule, this device is few times faster than the internal-sensor model. The maximum length of the probe line wire should not exceed 15 m; the maximum length of the binary-input cable should not exceed 30 m. It is recommended to use shielded cables. The device has not a protection against the ingress of water or dust. Do not use device at places where such conditions can be expected.
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Connection:
The procedure for connecting the wires to the terminals can be found in Annex 4.

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U3120M, U3120G

Compact thermometer hygrometer
This model is designed to measure temperature, relative humidity and dew-point temperature by internal sensor, no additional probes or sensors can be connected. It is characterized by a simple and compact design and a relatively long response to a temperature and humidity change, compared to model with external probes. The sensors are located under the grid on the front of the device. The device is suitable for measuring in places where there is no rapid change in temperature or relative humidity, and there is no condensation of water vapours. If water vapour condensation occurs inside the datalogger, then the resulting water will remain there and may damage its electronics. The device is placed directly in the measured area, while the installation needs to ensure sufficient level of mobile signal at the installation location. As the internal battery creates a parasitic heat during the charging period, the measurement accuracy may be affected by up to 1 º C. We recommend calibrating the relative humidity and temperature of this device in the laboratory with a sufficient air flow (at least 1 m / s), the reading can be performed only after thorough settling, which can take up to 4 hours.

U3121M, U3121G
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Thermometer ­ hygrometer for external probe
This model measures temperature, relative humidity and dew point temperature using an external COMET Digi/E series probe. Its response to the temperature or relative humidity change is significantly faster than by models with internal sensor. This model is often utilized to monitor areas in which only the probe is installed, whereas the main unit is installed elsewhere. When monitoring remote areas, the maximum probe line wire must not exceed 15 m. The Digi/E series probes provide calibrated measurement values. Hence, they may be replaced without having to modify the device setup.
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U3631M, U3631G

Compact thermometer hygrometer with optional external temperature probe
This model is designed to measure temperature, relative humidity and dew-point temperature by internal sensor, moreover one additional external temperature probe Pt1000/E can be connected. Internal sensors are located under the grid on the front of the device. The device also measures the temperature from an external probe and the difference between this temperature and the dew point temperature. If the surface temperature of the material is measured by an external probe, the risk of condensation of water vapor on the surface to be measured can be determined immediately. The device alone is suitable for measuring in places where there is no rapid change in temperature or relative humidity, and there is no condensation of water vapours. If water vapour condensation occurs inside the datalogger, then the resulting water will remain there and may damage its electronics. The device is placed directly in the measured area, while the installation needs to ensure sufficient level of mobile signal at the installation location. As the internal battery creates a parasitic heat during the charging period, the measurement accuracy may be affected by up to 1 º C. We recommend calibrating the relative humidity and temperature of this device in the laboratory with a sufficient air flow (at least 1 m / s), the reading can be performed only after thorough settling, which can take up to 4 hours. The maximum length of each probe lead should not exceed 15 m. It is recommended to use shielded cables. To maintain the IP rating, the unused probe connector should be provided with a supplied closing cap.

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U4440M, U4440G

Compact thermometer hygrometer – pressure gauge – CO2 concentration meter
This model is designed to measure temperature, relative humidity, dew-point temperature, barometric pressure and the concentration of CO2 in the air by internal sensors. Barometric pressure can be measured as absolute or recalculated to sea level. No additional probes or sensors can be connected. It is characterized by a simple and compact design and a relatively long response in the measured quantities, compared to model with external probes. The sensors are located under the grid on the front and side of the unit. The device is suitable for measuring in places where there is no rapid change in temperature or relative humidity, and there is no condensation of water vapours. The device is placed directly in the measured space, during installation, care must be taken to ensure a sufficient signal level of the mobile operator at the installation location. As the internal battery creates a parasitic heat during the charging period, the measurement accuracy may be affected by up to 1 ºC. In battery mode, this model has significantly shorter battery life than models without CO2 concentration measurement. For this reason, the measurement of CO2 concentration does not occur as often as the measurement of other variables. By default, this is 2 minutes with the option of extending up to 10 minutes (option available in the Vision software). We recommend calibrating the relative humidity and temperature of this device in the laboratory with a sufficient air flow (at least 1 m / s), the reading can be performed only after thorough settling, which can take up to 4 hours. The device has not a protection against the ingress of water or dust. Do not use device at places where such conditions can be expected.

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U5841M, U5841G
Connection:

Datalogger with 3 inputs 0 ­ 10 V and 1 binary input
This model is used to measure up to three voltage inputs 0-10 V DC while allowing one binary input to be monitored. The voltage inputs are not galvanically isolated from one another. This means that the negative terminals (“-“) are connected to each other. These facts must be taken into consideration when designing the device into the circuit. Incorrect connection may cause degradation of the measured values. Binary input serves to monitor voltage signals or signals coming from a dry contact. The binary input changes are registered immediately, irrespectively of the recording interval setting. To safe record the input status, the signal must be present for at least 1 s. Unlike the U0843M (U0843G) model, this input can capture connected/ disconnected voltage status. Input signals are connected to a pluggable terminal block. The device has not a protection against the ingress of water or dust. Do not use device at places where such conditions can be expected. The maximum length of the input wires should not exceed 30 m. It is recommended to use shielded cables.
The procedure for connecting the wires to the terminals can be found in Annex 4.
Optional accessories: LP106 – Adapter with terminals for easy connection of input signals

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U6841M, U6841G

Datalogger with 3 inputs 0 – 20 mA and 1 binary input
This model is used to measure up to three signals from current loops (0 to 20) mA DC while allowing one binary input to be monitored. The current inputs are passive and are not galvanically isolated from one another. This means that the connected sensors cannot be connected to the current loop and the negative terminals (“-“) are connected to each other. These facts must be taken into consideration when designing the device into the circuit. Incorrect connection may cause degradation of the measured values. Standard outputs (4 to 20) mA can also be measured with current inputs without any problems. Binary input serves to monitor voltage signals or signals coming from a dry contact. The binary input changes are registered immediately, irrespectively of the recording interval setting. To safe record the input status, the signal must be present for at least 1 s. Unlike the U0843M (U0843G) model, this input can capture connected/ disconnected voltage status. Input signals are connected to a pluggable terminal block. The device has not a protection against the ingress of water or dust. Do not use device at places where such conditions can be expected. The maximum length of the input wires should not exceed 30 m. It is recommended to use shielded cables.
The procedure for connecting the wires to the terminals can be found in Annex 4.
Optional accessories:
LP106 ­ Adapter with terminals for easy connection of input signals

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U7844M, U7844G

Two-channel binary-input counter
This model includes four inputs. Two of them can function as counters, and all four inputs can function as binary inputs. Both counter and binary inputs serve to monitor voltage signals or signals coming from a dry contact. The binary input changes are registered immediately, irrespectively of the recording interval setting. To safe record the input status, the signal must be present for at least 1 s. Unlike the U0843M (U0843G) model, binary inputs can capture connected/disconnected voltage status. The counter states are recorded according to the set Record interval. Input signals are connected to a pluggable terminal block. The device has not a protection against the ingress of water or dust. Do not use device at places where such conditions can be expected. The maximum length of the input wires should not exceed 30 m. It is recommended to use shielded cables.
Optional input configurations: · 2 x counter + 2 x binary input · 1 x counter

• 3 x binary input · 4 x binary input
  Connection:

The procedure for connecting the wires to the terminals can be found in Annex 4.

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U8410M, U8410G

Compact CO2 concentration meter
This model is designed to measure concentration of CO2 in the air by internal sensors. No additional probes or sensors can be connected. It is characterized by a simple and compact design and a relatively long response in the measured quantities, compared to model with external probes. The sensor is located under the grid on the front and side of the unit. The device is placed directly in the measured area, while the installation needs to ensure sufficient level of mobile signal at the installation location. In battery mode, this model has significantly shorter battery life than models without CO2 concentration measurement. The measurement of CO2 concentration occurs 2 minutes standardly with the option of extending up to 10 minutes (option is available in the Vision software). The device has not a protection against the ingress of water or dust. Do not use device at places where such conditions can be expected.

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COMET Vision program
Minimum HW and OS requirements __
· Windows 7 operational system and higher, or Windows Server 2008 R2 operational system and higher
· 1.4 GHz processor speed · 1 GB memory
Program description __
The COMET Vision program is used to set up COMET devices, to obtain the recorded data and the currently measured values.
The program is available free of charge (www.cometsystem.com), any number of devices can be connected simultaneously (e. g. data from several devices can be downloaded concurrently; several online displays may be running at a time). Moreover, some advanced features are available (e. g. graphs, statistic previews of registered data, userdefined online display, export into a database etc.).
The starting point for the program control is the menu situated in the left (optionally right) portion of the utility software and containing the basic options “Home”, “Devices”, “Files”, “Online display”.
Adding the datalogger to a list of the COMET devices ____
The USB-connected device is automatically detected within approx. 5 seconds (required for connection initialization time). When connected to a computer, the device is automatically added to the COMET device list.
A device can be added manually after clicking on the “Add device” button. This can be found in the “Welcome” screen, which is displayed upon the first program launching, later in the “Home” or “Device” tabs. A screen containing a connection type choice will appear. Here, USB should be selected. Subsequently, after “Finish” button confirmation, the device will be added.

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Setting up the device
After the datalogger has been switched on, it starts measuring, data recording and evaluating alarms according to the device’s setting up performed by the user. Complete device setup can be performed by the aid of the COMET Vision user software (hereinafter SW). During configuration editing the device can work normally, nevertheless the access to some functions (record download, contemporary configuration editing by other users) is limited.
How to set up the device by means of a program
· Connect the datalogger to a computer, run the user SW. · After starting the program, you will see all currently connected devices
in the device list. Note: if you had SW on first and connected the datalogger then it will be automatically added to the instrument list. · Select the device you want to set up. The Device Home panel displays its current status and device information. · Click on the Configuration button. The device configuration will be downloaded; you will be able to view it. · If you change the setup of some item, the SW will pass over into the editing mode. The other users’ access to the device will be limited during the editing procedure. · In case of a longer idle time the configuration editing mode will close automatically. · Finally save the new configuration into the device (Apply changes).
The device setup from a program (Configuration)
General – Information __
In this panel basic device information is available. Here is above all its name (Device name), which serves to identify the device and the measurement values it provides. You can name the device e.g. according to its location or utilization, or you can leave its original setting. The maximum length of this description, in which you can use letters, numerals, underscores and further signs, is 31 characters. More information, which is indicated in this panel, is the device’s serial number, model, firmware version and information, whether the model contains an internal modem to send SMS messages.

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General – Preferences _____
In this panel you can choose the unit with which the device will measure the temperature (Default temperature unit °C/°F). With some devices the pressure unit can be chosen, too (Default atmospheric pressure unit). When the device does not measure the atmospheric pressure, but when it is necessary to know its value to measure some quantities (calculated humidity and CO2), the atmospheric pressure value must be entered (Default value of atmospheric pressure in the area according to altitude).
With barometers, the correction constant can be entered here for conversion to the equivalent sea level pressure. This constant can be entered either as a current pressure converted to the sea level found out e.g. at a near observatory, or through the medium of the elevation above sea level.

General – Data and Time ___
Here you can set the date and time running inside the device (Date and Time). In the datalogger local current time is running according to your setting. By means of the UTC Offset choice you can fix its relation to the UTC. This information will be available for all time data provided by the device. The device cannot automatically pass over between summer and winter time.
CAUTION – after changing date and time the data recorded by the device will be deleted!

Advanced – LCD Display ___
In this panel you can set a variety of display and keypad behaviour modes.

Advanced ­ Other settings (Keypad, Device start, Energy) _
In this panel you can set some functions of the datalogger’s buttons, a delayed switching-on of the datalogger or the control of its switchingon by a binary input (according to type). In addition, the datalogger`s switching-on and/or off by a button on the datalogger panel can be enabled or disabled.
In the standard mode the datalogger measures all channels using an interval of 10 s. This interval can be shortened to 1 s when a faster measuring procedure is required. A disadvantage of this mode is a higher power consumption. When the device is operated for a long time, there is no need for a fast response to the change in the measurement values and a long battery lifetime is what matters,

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you can set the Measuring interval to 1 minute. The CO2 concentration channel measures with a 2-minute interval and can be extended up to 10 minutes to save more battery life. For details concerning power consumption, see “Technical parameters”.
Record _____
The choices that are available in this panel serve to control the device`s recording functions. The recording function may be switched on and off when needed (Recording with interval). However, if you switch the recording off and then you switch it on again, the memory free space may be reduced by up to 0.2 % of its total capacity. Use Cyclic record in the case that you require the device to continue recording even if the measurement data memory is filled up with data. In this case the oldest data is gradually overwritten by the newer data. If you do not use this choice, the data recording will be stopped on reaching the full storage capacity. Another important parameter is the Record interval. It can be set from 1sec/10sec/1min (according to settings in Advanced ­ Other settings (Energy) – Measuring Interval) to 24 hours (See “Recording interval”). The recording takes place every time at integer multiples of the pre-set interval. For example, if you switch the device on at 5:05 and the recording interval has been set to 1 hour, the first data will be recorded at 6:00, the following data at 7:00 and so on.
The data recording can take place either incessantly, or only in the instant when some of the measurement values gets into an alarm condition (system alarms do not trigger the recording). Choose Record mode.
By default, the device records instantaneous readings at a preset recording interval. Another option is to select the record “average, minimum and maximum values per recording interval”. Example: the selected recording interval will be 1h, then every 1h the three values – average, minimum, and maximum – will be stored for the past hour. Therefore, the next three values are saved again in an hour and will correspond to the values in the last hour interval. Attention these Min / Max values are only related to the selected recording interval and are different from the global Min / Max values displayed on the instrument’s display (these are for the entire period of operation since their last manual reset).
The record setting is completed by choosing measurement channels that are supposed to be recorded.
CAUTION – After changing cyclic non-cyclic recording (in either direction) the data recorded in the device is to be deleted! SW warns you when saving a new configuration and gives you the option to save data.

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Channels___

In this panel you can set all input channels. The assignment of the measurement value and its range to a channel is factory-set and cannot be changed.

Depending on the device type, up to three calculated channels are available (for details see Annex 5).

Supply a suitable name of the location to be measured (or calculated value) for each channel and decide whether it will be switched on for measurement and for recording.

Further items, like those for entering the decimal place number, the name of the physical unit and the conversion of the measurement values by means of the so-called User calibration are available in channels with voltage and current inputs only. In these inputs no physical quantity unit is displayed on the device’s LCD display. If the value cannot be displayed on the device’s display for a large number of digits, then Hi (if greater than the displayable number) or Lo (if less than the displayable number) is displayed. However, this error message only concerns the display on the device display, not the measurement and recording.

An example of user-defined calibration for a sensor having a 4 to 20 mA current output. The sensor is connected to the datalogger’s current input; the sensor’s measurement range is -30 to +80 °C:

Lower point A: Input value: 4 will be shown as -30 Upper point B: Input value: 20 will be shown as 80

In a channel for external Pt 1000 probes there exists the possibility to enter the probe parameters to correct the measurement error caused by probe cable length.

In binary channels you can decide whether a voltage signal or a contact (an open-collector transistor) will be connected to the input. Then enter textual descriptions of the states for both input levels. In this way the states will be displayed in the record, in the online display, and in this manner they will be sent in SMS messages, too. At the same time, from the menu, choose symbols for displaying these states by the device.

For a counter channel, decide whether to report an error or continue from zero after it is overflowed. The range is 24 bits, it means max. 16 777 215.

In the next step, set alarm states for each measured variable. You can set up to 2 alarms for each measured quantity (alarm 1 and alarm 2 buttons). Each alarm must be enabled (on/off) first.

Furthermore, choose whether the alarm should arise from exceeding the limit value or from dropping under it (value is greater than / value is

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lower than). Enter this limit value. In binary inputs, only the input state must be defined. Subsequently, the alarm delay time must be entered (for the duration of). This delay time serves to eliminate contingent momentary overshoots of the limit value. The hysteresis, too, has a similar significance (Alarm hysteresis). It prevents the alarm from oscillating in the case that the measurement value varies around

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the alarm limit value. It is not recommended to set it equal zero.
Thus, the setting for generating an alarm is completed. It remains to decide, whether the alarm should be indicated optically by means of a LED diode on the device (Optical signalling – LED), acoustically (Activate internal acoustic signalling) or by sending a alarm text message to up to four selected recipients (when alarm occurs/disappears, send SMS to selected recipients).
In SMS messages you can determine whether they are supposed to be sent out on alarm generation and on alarm disappearance, too. In both cases add a custom text description of the status that the recipient will see in the message.
Alarm events ____
The device makes it possible to evaluate alarm situations, which can either originate from the measurement data, or they can notify of a certain device condition (exceeding the memory occupancy limit, system alarms). The individual alarm situations can be assigned the way of their signalling to the user.
An alarm originating from a measurement value is every time signalled on the device display by means of a bell icon ahead of the corresponding measurement value. General information about any alarm occurring in the device is displayed by ALARM warning on the device display (except for an exceeded memory occupancy limit, which is signalled by a flashing Memory sign).
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An alarm can be signalized by a fast flashing of the LED diode on the device panel (Optical signalling – LED). In the case that only one alarm originating from a measurement value is active, a yellow LED is flashing. In the case that more alarms occur simultaneously, or a system alarm or an alarm originating from an exceeded memory occupancy limit occur, a red LED diode is flashing. NOTE: A blue flashing LED diode does not notify an alarm, but the communication of the radio modem with the operator’s network.
Besides, an alarm may be signalled acoustically by a characteristic sound, which is repeated at regular intervals. If the device is connected to an external power supply, the acoustic signal is more intense than with battery power.
The operator alerted this way can confirm the acoustical or optical (LED diode) signal and so mute it until a new alarm occurs (See the chapter “Operating the datalogger from the keypad”).
Alarm events – Preferences _____
In the standard mode the alarm lasts only during the time when the measurement values lie outside the allowed limits. As soon as they return inside the allowed limits, the alarm will cease. In some cases, it is desirable for the user to be informed of an alarm that has occurred during his absence. If you enable the Latched alarms choice in the device setting, then every alarm occurring in the device remains active until operator intervenes, irrespective of the measurement values (i.e. until the time of manual cancel). Latched Alarms Memory can be deleted either from SW Vision and/or by device restart by buttons (the device Off and On). The availability of these choices depends on device configuration settings.
Moreover, alarm evaluation may be enabled here for selected days of the week only and for certain hours of the day. This setting can also be used for system alarms, but it should not be combined with the above described option Latched alarms.
Alarm events ­ Mute of signalling____
In this panel you can enable or disable the alarm signalization deactivation ­ mute of signalling. Depending on the device configuration, deactivation of the signalling can be done either by SW Vision and / or from the device keypad (in menu item ALARM on LCD).
The alarm signalling means either optical signalling – by a flashing LED, or acoustic signalling – by an intermittent tone (beeping). The alarm deactivation function allows you to deactivate (mute) the alarm signalling for the duration of the alarm condition (the corresponding alarm symbol remains on the display).
Deactivation of the signalling can be according to the device configuration:

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– permanent – the optical and/or acoustic signalling is deactivated until new alarm occurs. In this case, the “Reactivate muted alarm signalling” item must be switched off in the device configuration. – time-limited (temporary) – if the alarm after the set time interval is still current, the optical and/or acoustic signalling is activated again. The time interval can be set in the device configuration under the item “Reactivate muted alarm signalling”.
By local keypad on the device only deactivate the optical and/or acoustic signalling; Sign ALARM at the top of the display is displayed for the whole time of the alarm condition.
Alarm events – Memory occupancy
Use this panel setting, if an overrun of the pre-set limit value of the data memory occupancy needs to be signalled. The signalling mode may be selected optionally as optical (by means of a LED diode), acoustical, or it may be realized by sending a warning SMS message up to as 4 selected recipients.
Alarm events – System failure ____
These panel choices make it possible to set the so-called system alarms, which indicate some technical failure of the datalogger or of some of the probes connected to it. The signalling mode may be selected optionally as optical (every time by means of a red LED diode), acoustical, or it may be realized by sending a warning SMS message up to 4 selected recipients.
The device can respond to the following conditions:
a) Measurement error on any channel …… e. g. a probe has been disconnected or broken.
b) Device configuration error …… the device configuration has been disturbed unexpectedly.
c) External power failure …… the USB connector of the device can be used to charge the battery, or it can be permanently connected to external power (USB charger or computer). This state can therefore be used as an external power failure indicator.
d) Low battery …. it informs that it is necessary to connect external power and charge the internal battery, see “Charging the batteries”.
e) Time setting error or battery is discharged …. the battery has run out of charge.

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Modem – General _____
In the configuration enter the PIN code for your SIM card, if required (given by the settings of the SIM card used). By default, your device is set to not require the PIN code. If the PIN code is set on the SIM card and the required pin is set incorrectly in the device configuration, the SIM card will be blocked when attempting to connect to the mobile operator network, see “Display warnings” chapter. This option does NOT change the PIN code settings on the SIM card, only the PIN code required for the SIM card is entered here.
Modem ­ Text message – General ____
In the case that the alarm condition persists for a longer time, determine whether the warning text message should be sent on the alarm inception only, or whether it should be repeated. The repetition interval can be pre-set in a range of 30 minutes to 24 hours.
Specify the total daily limit for the number of SMS messages sent from the device (i.e. the maximum number of sent SMS messages per day for both battery and external power together) and the maximum daily limit for the number of messages sent in battery mode (to conserve battery capacity). Before sending a message, the daily limit value will be ascertained. Should the limit value be reached, the respective recipient will receive a message indicating that the daily limit of the outgoing messages has been reached. For the day in question no further messages will be sent to the recipient’s number. When it is required to send the message to another recipient, only a notification is sent about the daily message limit error. No further messages will be sent out to this recipient’s number on this day. The daily limit will be reset at time 00:00.
If you want alarm text messages to be sent, remember to assign the pertinent recipients of these messages to the particular alarms. This concerns alarms on measurement channels, system alarms, as well as warnings about exceeding the data memory occupancy limit. This assignment is to be performed during setting the individual alarms.
Modem ­ Text message – Recipients __
In this panel you can set the recipients of the SMS messages. You may enter up to 4 recipients of text messages that the device will work with. Each recipient is identified by their name, telephone number, additional text and an activity flag. If you clear this flag, text messages will not be sent to the selected user, but all its settings will remain unchanged. This way you can easily deactivate a user in a simple manner and restore it later.

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Modem ­ Text message – Keep alive SMS __
In this panel you can set Keep-alive SMS sending parameters. It means sending information messages at regular intervals, regardless of alarm status.
Set the interval for sending Keep-alive text messages. Such messages can be sent by the device to all selected recipients on regular interval basis. They include the datalogger identification, the current measurement values of all channels as well as the conditions of all alarms. These messages can contain user-readable data or alternatively machine-readable data. For more detail see Annex 6: SMS message format. The shortest interval that can be set is 5 minutes; the longest interval is 1 week. With intervals that are longer than 1 day a daily message sending time can be set.
Determine which recipients the informative Keep-alive text messages with user- readable data should be sent to. An easy readability by a mobile phone is an advantage of this kind of messages. The disadvantage is that larger reports can be divided into several messages. These messages will not be sent out if no recipient has been chosen.
Determine which recipients the informative Keep-alive text messages with machine-readable data should be sent to. These messages are suitable for machine processing in customer’s systems. All data is every time compressed into a single message. This data is not suitable to be read on a mobile phone. These messages will not be sent out if no recipient has been chosen.
Modem ­ Data – General ___
In this panel, you configure the APN settings needed for data communication with your mobile operator (sending data messages). Contact your SIM card supplier for this information.
If you are using your own data collection system, the “JSON version” option allows you to set the older data message format to be backward compatible with the older data collection system with new devices. This option is to maintain the backward compatibility of newer devices with the older collection system, without having to update it.
Modem ­ Data ­ Data sending __
This panel sets where and how often messages will be sent. You can send the data: · Periodically in preset interval. The interval is selectable from 5
minutes to once per week and you can set different interval when battery powered and when it has external power available.
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· Asynchronously (immediately) when preset alarm occur.
For battery mode you can select “Buffered mode” option which collects data into internal buffer and then sends them together in preset interval. It sends more data at once and saves battery life. On the other hand, the data is received with higher delay.
In the URL field, enter the destination address where you want to send messages. For use with COMET Database, type the address of the SOAP server, see chapter 8.2 Automatic data sending to the database in Comet Database manual (e.g. http://192.168.1.1/soap).
To send data to the COMET Cloud storage system, select this item as the destination server and the URL will be set automatically. To register, use the COMET Cloud Registration Card supplied with the device (the activation procedure is described on the card). This will allow trial (usually 3 months) free access to the COMET Cloud system. You can then extend this trial period by purchasing a Top-Up Voucher for COMET Cloud (code SLU503).
If the user wants to realize his own collection system, the manufacturer can offer php scripts for message processing.

Security____

When this service is activated in the device configuration, the user is prompted to set the password for the highest user – Administrator. Subsequently, the device allows users to activate User1, User2 and PowerUser and set their own login passwords. The rights of each user are listed in the following table:

User

Rights

Administrator – Edit all parameters of device configuration – Download and erase recorded data

– Go to service mode

PowerUser

– Edit device configuration without security parameters, change device time setting

– Download and erase recorded data

User2

– Download and erase recorded data – Switch On/Off device

User1

– Download recorded data – Switch On device only (cannot switch it Off)

From the moment the configuration is saved to the instrument, the instrument will require a username and password each time it is connected to the SW. You will not be able to connect the device without entering this information.

Summary ___
Printable summary of all device setting.

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Application notes
Operation with a constantly connected charger __
Datalogger is primarily intended to be operated as an autonomous unit powered by its built-in batteries. Nevertheless, you can also operate it with a charger which is constantly connected to it, or with a computer. The datalogger’s internal charging circuitry controls the battery charging process based on its instantaneous condition, thus protecting it against damage. In the case that a cable is connected to the USB connector, the device is not protected against dust and water ingress, and, consequently, it cannot be operated in locations in which such ingress protection is required. The internal charging circuitry initiates the battery charging only when the device’s internal temperature ranges between 0°C and 40°C. If this is not the case, the battery will not charge even if the charger is connected.
Device switching on and off____
If you switch on and off the device frequently, then its keypad and both functions, i.e. device switching on and off from the keypad, must be enabled in the device settings. Another option is to set the date and time when you want the device to turn itself on automatically. Once reached, it will be permanently switched on. For binary input dataloggers, it is possible to control the recording on and off by the level at this input (voltage or contact).
Measuring calculated humidity values
From among the calculated humidity values the device can provide the dew-point temperature only. Other relevant calculated humidity values can be obtained by subsequent data processing in the SW.
What is the purpose of the system alarms and how to work with them

System alarms are useful for performing the functionality diagnosis of the device and of the probes connected to it. A system alarm notifies of a failure or damage of the device or of its probe. On the contrary, alarms on measurement values indicate a failure of the technology the device is monitoring. A system alarm may be intended for e.g. another person than that receiving measurement value alarms.

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Problems with measurement correctness __
Incorrect measurement values of temperature or relative humidity may, in most cases, be caused by an unsuitable probe location or improper methodology. Some notes concerning these problems are mentioned in the following chapter “Recommendations for operation and maintenance”. In probes using current and voltage outputs incorrect measurement results may be induced by latent coupling between individual components, e.g. across supply sources or through improperly connected cable shielding.
If the device indicates an error condition, see detailed information in Annex 1, selected error messages.
Another problem area relates to random peaks occurring within the measurement values. Their most frequent reason is a source of electromagnetic interference situated near the device or the pertaining cables. Attention must be paid also to possible damaged portions of the cable insulation. Prevent accidental contacts between wires and adjacent conductive parts.
Problems arising during communication with a computer __
For communication with a computer a cable should be used that is not longer than 5 m. Check that all connectors are properly seated. It is especially the USB-C connector that must be properly pushed into the receptacle. Cable disconnecting and subsequent connecting during communication can cause a temporary non-availability of the USB equipment in the computer. This may be corrected by closing the COMET Vision utility program (including the communication service) and starting it subsequently. Restart the computer, if the above mentioned measure is not the proper remedy. Check whether new HID equipment will appear in Device administrator after the device has been connected to the computer.
Problems arising during sending SMS messages with UxxxxM models

There are a lot of problem sources in this connection. If sending text messages does not work at all, you may try out the following steps:
· Set an alarm on some of the channels so that it might be induced easily (e.g. temperature alarm by warming the probe by holding it in hand, relative humidity alarm by taking the device in hand on the sensor side) and assign an SMS recipient to this alarm.
· Induce an alarm condition and follow the behaviour of the blue LED diode. After switching the modem on the diode should start flashing fast for a short time (registration in the network), then more slowly (message sending) to finally go off (finishing).

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· If the blue diode does not start flashing at all, then the datalogger`s radio section has not been activated at all. It may be caused by an improper setting: A non-functioning SIM card has been inserted, the SIM Card has been blocked because a wrong PIN has been entered, the alarm is not activated at all, no phone number is assigned to the alarm, and the like). Verify whether the SIM card is protected by a PIN code. If this is the case, verify if the code has been entered properly in the device configuration.
– Make sure the SIM card is properly seated in its holder. Make sure the holder is locked.
– Insert the SIM card into the mobile phone and verify that the SMS messages function properly. Try the same phone numbers as those you have stored in the datalogger.
– Check that the datalogger antenna is not damaged and that it is properly connected.
– Contact your service department (possible failure diagnostics, wrong interconnection of internal component parts, …)
· If the blue LED flashes quickly, but it does not pass over to a slower frequency, then the modem probably failed to be registered in the network. Make sure there is sufficient signal strength near the antenna.
· If the blue LED flashes quickly and then slowly to go out completely, the modem has not been registered in the network. The message has been sent out (but has not arrived), or it has been refused by the network. Try another phone number of the recipient, verify if you enter it in the international format (e.g. +420333222111). Verify in the configuration of the datalogger, that its name contains letters and numerals only. Do the same with the name of the measured channel and with the alarm settings in the user-defined descriptions of the SMS messages. Verify if SMS messages can be sent out from the respective SIM card: Insert it into the mobile phone and try to send a text message to the same number. Ascertain whether the message has been transmitted.
· Contact the service department in the case that you have not succeeded in finding the reason of the problem. Diagnostic records that are saved in the device could deliver further helpful information for resolving the problem.
Problems arising during sending SMS messages with UxxxxG models

There are a lot of problem sources in this connection. If sending text messages does not work at all, you may try out the following steps:
· Set an alarm on some of the channels so that it might be induced easily (e.g. temperature alarm by warming the probe by holding it
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in hand, relative humidity alarm by taking the device in hand on the sensor side) and assign an SMS recipient to this alarm.
· Induce an alarm condition and follow the behaviour of the blue LED diode. After turning on the modem, it should light up for a while (searching for the network), then flash more slowly (registering to the network), then quickly (sending data) and then turn off (completed).
· If the blue diode does not start flashing at all, then the datalogger`s radio section has not been activated at all. It may be caused by an improper setting: A non-functioning SIM card has been inserted, the SIM Card has been blocked because a wrong PIN has been entered, the alarm is not activated at all, no phone number is assigned to the alarm, and the like).
· Verify whether the SIM card is protected by a PIN code. If this is the case, verify if the code has been entered properly in the device configuration.
– Make sure the SIM card is properly seated in its holder. Make sure the holder is locked.
– Insert the SIM card into the mobile phone and verify that the SMS messages function properly. Try the same phone numbers as those you have stored in the datalogger.
– Check that the datalogger antenna is not damaged and that it is properly connected.
– Contact your service department (possible failure diagnostics, wrong interconnection of internal component parts, …)
· If the blue LED is on but does not go into a slower flashing interval, then the modem probably failed to register to the network. Check if there is sufficient signal strength at the antenna location.
· Contact the service department in the case that you have not succeeded in finding the reason of the problem. Diagnostic records that are saved in the device could deliver further helpful information for resolving the problem.

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Recommendations for operation and maintenance
Datalogger operation in several application areas____
Before putting the device into operation, it should be considered, if its usage is suitable for the intended purpose. In connection with this consideration the device’s optimum settings should be determined. In the case that the device is part of a larger measurement system, instructions for its metrological and operational checks should be developed.
Inadvisable or hazardous applications:
This datalogger is not intended for such applications in which the failure of its functioning could directly endanger life and health of humans and animals, or the functioning of other equipment with life-sustaining functions. In applications the failure or malfunction of which could result in severe property damage it is recommended to provide the system with suitable and independent signalling equipment which is able to evaluate such a condition and, in case of failure, to prevent the above mentioned damages (See the chapter “Safety measures and unauthorized manipulations”).
Device positioning:
Adhere to principles and procedures mentioned in this manual. Try to choose such a place to position the device, where the negative influence caused by environment is as low as possible. When performing measurements in refrigerators, metal boxes, metal chambers and the like, it is every time advisable, as far as the device’s operation and reliability is concerned, to place the device outside, leaving only the sensors and probes inside the measured environment.
Positioning of temperature sensors:
These sensors should be placed in locations where sufficient air circulation is ensured and where the most critical location is supposed (according to the application requirements). To prevent heat conduction through the sensor cables from undesirable influencing the measurement value, the sensor must be properly inserted into the measured environment. If you follow the temperature distribution in an air-conditioned storehouse, do not place the sensor into the direct air stream generated by the air-conditioning unit. As a matter of fact, the temperature distribution in large-chamber refrigerators may be quite inhomogeneous, the temperature differences reaching up to 10°C. Similar dispersion can be found inside deep-freezing boxes (e.g. in those used for blood preservation by deep freezing).

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Positioning of humidity sensors:
The positioning of humidity sensors depends again on the application requirements. Humidity measurements in refrigerators without additional humidity stabilization can be very questionable. When the cooling is switched on/off, there may be significant changes in humidity in the range of tens of percent, even if the mean value is correct. Moisture condensation on the ventricle walls is common.

Recommendations for metrological checks _____
Metrological verification is carried out according to the requirements of the particular application at intervals fixed by the user. In some cases, calibration must be performed by an independent laboratory that is accredited by the government.

Recommendations for regular checks _____
It is recommended to check the system in which the instrument is incorporated at regular intervals. Checking interval and inspection scope depend on the particular application and the user’s internal regulations. In fixed installations following checks are recommended to be performed:
· Metrological verification. · Regular checks fixed by the user.
· Judgement of all problems that has occurred since the last check. · Visual check of the device, connectors condition, cover integrity.
· Functionality check (checking of features utilized by the application): a) Check of the transfer of the actual recorded value into the computer, record evaluation b) Checking the functionality of individual alarms. This should be done by changing the input quantity to give rise to an alarm. Then check it visually on the display. Check whether the SMS message has been sent (if used). c) Judgement of the battery condition on the display.
· Check of the cabling. To be checked: Condition of cable connections and cable surface integrity, proper cable routing, no additional parallel heavy- current conductors.
· Check of all sensors. This is to be performed visually. Check for water ingress, check for suitable sensor location with respect to correct measurement conditions and possible signal deteriorating by interference.
· The check results are to be recorded.

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Service recommendations _____
Engineering support and service activities are provided by the device distributor. His contact person’s address is given in the Certificate of warranty included with the product.
WARNING – Unskilled intervention into the device may lead to loss of warranty!

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Technical parameters
Power supply

The device is supplied from an internal Li-ion battery, which is placed under the rear cover. The battery may be replaced by the producer or an authorized service provider only.

Battery _____
Battery model used: Built-in Li-Ion battery A8200, 3.6V/5200mAh (included)
Operating lifetime relating to a single charge of the Li-ion rechargeable battery:
Several months to several years according to the device setting and number of messages sent. Devices with a CO2 concentration sensor have a higher battery consumption and therefore shorter holding time. Follow the battery status, recharge battery if necessary.

Battery charger __
Recommended charger type: Commonly used chargers, such as mobile phone chargers with a USB type C connector, such as Sunny SYS 1561-1105
Maximum current from the USB connector:
· Provided that the datalogger is connected to the computer and a successful enumeration takes place, the input current limit will be set to 500mA.
· If no successful enumeration takes place within 10 s after powering up the device (the device is not connected to the computer), then the input current limit is increased to 1500 mA. However, when the input voltage drops, the current drawn from the connector will decrease automatically.
Charging time: Charging time depends on the current battery discharge level. Since the parasitic heat is generated when the internal battery is charging, the charging speed for devices with internal temperature and/or humidity measuring is deliberately slowed down to prevent

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excessive influence of measured values. If you want to charge these devices as soon as possible, turn it off first. When the device is turned off, the fast charging mode is automatically activated. Fully charged battery is indicated on the display of the device usually within 6 hours. Charging conditions: The charging process only runs when the internal temperature ranges between 0 °C and 40 °C.
USB communication interface
Compatibility: USB1.1, USB 2.0, USB3.0
Connector: USB-C
Measuring, data storage and real time circuitry
Measuring Interval: 10 s as standard 1 s in fast mode 1 minute in economic mode
Recording interval: (1 s, 2 s, 5 s, 10 s, 15 s, 30 s) 1 min, 2 min, 5 min, 10 min, 15 min, 30 min, 1 h, 2 h, 3 h, 4 h, 6 h, 8h, 12 h, 24 h You cannot select a shorter Recording interval than the Measuring interval.
Storage capacity: Maximum 500 000 values in non-cyclic record Maximum 350 000 values in cyclic record

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Radio section
The datalogger includes a radio modem intended for data transfer and sending SMS messages. This modem is only powered up and registered in the mobile operator network only when SMS messages’ sending off is required. Otherwise, it is switched off.
UxxxxM series – transmission power and frequency: Quad-band 850/900/1800/1900MHz GPRS Mobile Station Class B Compliant to GSM Phase2/2+ Class 4 (2W @ 850/900MHz) Class 1 (1W @ 1800/1900MHz)
UxxxxG series – transmission power and frequency: GSM900 band (890 ~ 915 MHz, 33 dBm, GMSK, 8-PSK) DCS1800 band (1710 ~ 1785 MHz, 30 dBm, GMSK, 8-PSK) LTE FDD B1 band (1920 ~ 1980 MHz, 23 dBm, QPSK, 16QAM) LTE FDD B3 band (1710 ~ 1785 MHz, 23 dBm, QPSK, 16QAM) LTE FDD B7 band (2500 ~ 2570 MHz, 23 dBm, QPSK, 16QAM) LTE FDD B8 band (880 ~ 915 MHz, 23 dBm, QPSK, 16QAM) LTE FDD B20 band (832 ~ 862 MHz, 23 dBm, QPSK, 16QAM)
Antenna connection: Connector: SMA, female Impedance: 50 Antenna gain: 3 dBi max. Antenna VSWR: < 1:2
Antenna properties: Model: AO-AGSM-SMVS Gain: 2 dBi VSWR: < 1:1.8
SIM card: The datalogger includes a slot for inserting a micro-sized SIM card. Use a suitable reduction if you own another sized card. The slot may be accessed after removing the datalogger’s rear cover.

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Parameters of datalogger inputs
U0110M, U0110G ____
Measured value: Internal temperature
Temperature range: (-20 to +60) °C
Accuracy: ± 0.4 °C() () During battery charging temporary measurement inaccuracy can occur.
Response time: t63 < 6 min, t90 < 15 min (temperature step 20 °C, air circulation approx. 1 m/s)
Display resolution: 0.1 °C
Recommended calibration interval: 2 years

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U0121M, U0121G ____
Measured values: 2 x temperature sensed by an external COMET Pt1000/E series probe
Temperature range: (-200 to +260) °C, Pt1000/3850 ppm sensor Measuring current: approx. 0.5 mA with pulses of approx. 60 ms length
Input accuracy (without probes): ±0.2 °C in a range of (-200 to +100) °C ±0.2 % of the measurement value in a range of (+100 to +260) °C The accuracy of the device with a temperature probe connected to it is determined by the above input accuracy and the accuracy of the probe employed.
Connection: Two-wire connection with the possibility of compensation of the error caused by the cable resistance. The probe is provided with a 3-pin M8 ELKA 3008V connector. Its connection is shown in Annex 2. The recommended length of the Pt1000/E probe cable is maximum 15 m, a length of 30 m must not be exceeded. Shielded cables are recommended.
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Response time:
Is determined by the response time of the used probe (it valid if Measuring interval is set to 1 s).
Display resolution: 0.1 °C
Recommended calibration interval: 2 years

U0141M, U0141TM, U0141G, U0141TG ___
Measured values:
4 x temperature sensed by an external COMET Pt1000/E series probe
Temperature range:
(-200 to +260) °C, Pt1000/3850 ppm sensor Measuring current: approx. 0.5 mA with pulses of approx. 60 ms length
Input accuracy (without probes):
±0.2 °C in a range of (-200 to +100) °C ±0.2 % of the measurement value in a range of (+100
to +260) °C The accuracy of the device with a temperature probe connected to it is determined by the above input accuracy and the accuracy of the probe employed.
Connection:
Two-wire connection with the possibility of compensation the error caused by the resistance of the cable wires.
The recommended length of the probes is up to 15 m, the length must not exceed 30 m. It is strongly recommended to use shielded cables.
For the U0141M (U0141G) model are intended Pt1000/E series probes ended with a 3-pin M8 ELKA 3008V connector. The connection of the connector is shown in Annex 2.
For the U0141TM (U0141TG) model are intended Pt1000/0 series probes without a connector. They are connected to a pluggable terminal block, max. wire cross- section: 1.5 mm2.
Response time:
Is determined by the response time of the used probe (it valid if Measuring interval is set to 1 s).
Display resolution:
0.1 °C Recommended calibration interval:
2 years

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U0246G ____
Measured values:
3 x input for temperature measurement using thermocouples
1 x temp. from an external COMET Pt1000/0 probe 1 x internal temperature
Range and input levels:
Inputs 1 to 3 can be switched by the user to measure temperature using thermocouples or to measure voltage (-70 to +70) mV.
Parameters of inputs 1 to 3 for different settings: · Type “K” thermocouple (NiCr-Ni)
Range: (-200 to +1300) °C Accuracy (without probes):
± (|0.3 % of the measurement value|+ 1.5 °C) Display resolution: 0.1 °C Cold junction: compensated in the temperature
range of (-20 to +60) °C
· Type “J” thermocouple (Fe-Co) Range: (-200 to +750) °C Accuracy (without probes): ± (|0.3 % of the measurement value| + 1.5 °C) Display resolution: 0.1 °C Cold junction: compensated in the temperature range of (-20 to +60) °C
· Type “S” thermocouple (Pt10%Rh-Pt) Range: (0 to +1700) °C Accuracy (without probes): ± (|0,5 % of the measurement value| + 5 °C) Display resolution: 0.1 °C Cold junction: compensated in the temperature range of (-20 to +60) °C
· Type “B” thermocouple (Pt30%Rh-Pt) Range: (250 to 1800) °C Accuracy (without probes): ± (|0.5 % of the measurement value| + 5 °C) Display resolution: 0.1 °C Cold junction is not compensated.
· Type “T” thermocouple (Cu-CuNi) Range: (-200 to +400) °C Accuracy (without probes): ± (|0.3 % of the measurement value| + 1.5 °C) Display resolution: 0.1 °C Cold junction: compensated in the temperature range of (-20 to +60) °C
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· Type “N” thermocouple (NiCrSi-NiSiMg) Range: (-200 to +1300) °C Accuracy (without probes): ± (|0.3 % of the measurement value| + 1.5 °C) Display resolution: 0.1 °C Cold junction: compensated in the temperature range of (-20 to +60) °C
· DC voltage of -70 mV to +70 mV Range: (-70 to +70) mV Accuracy: ± 70 uV Display resolution: 10 uV Input resistance: approx. 107
Parameters of input 4:
Range: (-200 to +260) °C, sensor Pt1000/3850 ppm
Measuring current: approx. 0.5 mA with pulses of approx. 60 ms length
Input accuracy (without probes):
±0.2 °C in a range of (-200 to +100) °C ±0.2 % of the measurement value in a range of (+100 to +260) °C
The accuracy of the device with a connected temperature probe is determined by the above input accuracy and the accuracy of the probe used.
Internal temperature:
Range: (-20 to +60) °C Accuracy: ± 0.6 °C ()
() During charging the batteries, the measurement accuracy may temporarily deteriorate.
Response time: t63 < 6 min, t90 < 15 min (temperature step 20 °C, air circulation approx. 1 m/s)
Display resolution: 0.1 °C
Response time on inputs 1 to 4:
Is determined by the response time of the used probe (it valid if Measuring interval is set to 1 s).
Connection: Pluggable terminal block, maximum wire cross section 1.5 mm2. The maximum cable length is 15 m. It is recommended to use shielded cables.
CAUTION: The inputs are not galvanically isolated!
Recommended calibration interval: 2 years

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U0843M, U0843G ____

Measured values:
2 x temperature by an external COMET Pt1000/0 probe
2 x binary input intended for voltage to be applied to it or a dry contact (an open-collector transistor) to be connected to it. This device is not suitable for catching the “voltage applied/not applied” states.

Range:
Temperature: (-200 to +260) °C, Pt1000/3850 ppm Measuring current: approx. 0.5 mA in approx. 60 ms long pulses Both voltage and no-voltage contact can be connected to the binary input without the need for configuration.

Voltage levels:

“L” level input voltage:

< 0.8 V(*)

“H” level input voltage:

2 V

Minimum voltage applicable: 0 V

Maximum voltage applicable: +30 V DC

(*) The voltage necessary for establishing the “L” level must factually be applied. Should the input be disconnected, the device will sense the “H” level.

Parameters of the dry contact:
Contact resistance in “switched-on” state: < 10 k
Contact resistance in the “switched-off” state: > 2 M
Excitation voltage: approx. 3 V Minimum state duration necessary for latching
the state: 1 s

Input accuracy (without probes):
±0.2 °C in the range of -200 to +100 °C ±0.2 % of the measurement value in the range
of +100 to +260 °C
The accuracy of the device with the temperature probe connected is determined by the above input accuracy and the accuracy of the probe used.

Connection: Pluggable terminal block, maximum wire cross section 1.5 mm2. Recommended length of the Pt1000 probe cables is maximum 15 m, a length of 30 m should not be exceeded. Maximum length of the binary inputs cables is 30 m. It is recommended to use shielded cables. CAUTION: The inputs are not galvanically isolated!
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Response time: Is determined by the response time of the used probe (it valid if Measuring interval is set to 1 s).
Resolution: 0.1 °C converter range: 16 bits
Recommended calibration interval: 2 years

U3120M, U3120G ____

Measured values:
Internal temperature, relative humidity. Dew-point temperature calculated from the internal temperature and relative humidity.
Ranges:
Temperature: (-20 to +60) °C Relative humidity: (0 to 100) %RH without permanent
condensation. Dew-point temperature: -60 °C to +60 °C Accuracy(*1):
Temperature: ± 0.4 °C Relative humidity:
– sensor accuracy ±1.8 %RH at 23 ºC in the range of 0 to 90 %RH
– hysteresis < ±1 %RH – non-linearity < ±1 %RH – temperature error: see diagrams in Annex 7
Dew-point temperature: ±1.5 °C at an ambient temperature of T< 25 °C and RH

30 %. For details see diagrams in Annex 3.
Response time (air flow 1 m/s approx.) (2):
Temperature: t63 < 2 min, t90 < 8 min (temperature step 20 °C)
Relative humidity: t63 < 45 s, t90 < 4 min, t99 <4 h. (Measured at and constant temperature for 30% humidity step)
Display resolution:
Temperature incl. dew-point temperature: 0.1 °C Relative humidity: 0.1 %RH.
Recommended calibration interval: 1 year
(1) During battery charging temporary measurement inaccuracy can occur.
(*2) Important information is provided in the chapter “Models produced ­ U3120M, U3120G”

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U3121M, U3121G ____
Measured values: Temperature and relative humidity measured by an external Digi/E series probe. The dew-point temperature is calculated from the measured temperature and the relative humidity.
Range and accuracy: Depending on the connected Digi/E series probe.
Response time: Is determined by the response time of the used probe (it valid if Measuring interval is set to 1 s).
Connection: Digi/E series probe. The probe is provided with a 4-pin M8 ELKA 4008V connector. The length of the Digi/E probe cable does not exceed 15 m.
Display resolution: Temperature incl. dew-point temperature: 0.1 °C. Relative humidity: 0.1 %RH.
Recommended calibration interval: 1 year (according to the connected probe)

U3631M, U3631 _____

Measured values:

Internal temperature, relative humidity. 1x External temperature measured by an external COMET Pt1000/E probe. Dew-point temperature calculated from the internal temperature and relative humidity. Difference of external temperature and dew point temperature.

Ranges:

Internal temperature: (-20 to +60) °C Relative humidity: (0 to 100) %RH without permanent
condensation (*2).
Dew-point temperature: -60 °C to +60 °C External temperature input:

Accuracy(*1):

(-90 to +260) °C, Pt1000/3850 ppm sensor Measuring current: approx. 0.5 mA in pulse
length approx. 60 ms

Internal temperature: ± 0.4 °C Relative humidity:

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– sensor accuracy ±1.8 %RH at 23 ºC in the range of (0 to 90) %RH
– hysteresis < ±1 %RH – non-linearity < ±1 %RH – temperature error: see diagrams in Annex 7
Dew-point temperature: ±1.5 °C at an ambient temperature of T< 25 °C and RH

30 %. For details see diagrams in Annex 3.
External temperature input (without probe):
± 0.2 °C in the range -90 °C to +100 °C ± 0.2 % of the measured value in the range
+100 ° C to +260 ° C The precision of the device with the connected temperature probe is determined by the abovementioned precision of input and accuracy of the probe used.
Connection method (external probe):
Two-wire connection with the possibility of compensation for the cable wire resistance. The probe is terminated by a 3-pin M8 ELKA 3008V connector. The method of interconnection is given in Annex 2.
The recommended length of probes Pt1000/E is up to 15 m, not longer than 30 m. It is recommended to use shielded cables.
Response time (air flow 1 m/s approx.) (2):
Internal temperature: t63 < 2 min, t90 < 8 min (temperature step 20 °C)
Relative humidity: t63 < 45 s, t90 < 4 min, t99 <4 h. (Measured at and constant temperature for 30% humidity step)
External temperature: Is determined by the response time of the used probe (it valid if Measuring interval is set to 1 s).
Display resolution:
Internal temperature incl. dew-point temperature: 0.1 °C Relative humidity: 0.1 %RH External temp. input: 0.1 °C, 16-bit converter range
Recommended calibration interval: 1 year
(1) During battery charging temporary measurement inaccuracy can occur.
(*2) Important information is provided in the chapter “Models produced ­ U3631M, U3631G”

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U4440M, U4440G ____
Measured values:
Internal temperature, relative humidity, barometric pressure and the concentration of CO2 in the air. Dewpoint temperature calculated from the internal temperature and relative humidity.
Ranges:
Temperature: (-20 to +60) °C Relative humidity: (0 to 100) %RH without permanent
condensation (2). Barometric pressure (absolute): 700 hPa to 1100 hPa Concentration of CO2 in the air: 0 to 5000 ppm Dew-point temperature: -60 °C to +60 °C Accuracy (1):
Temperature: ± 0.4 °C Relative humidity:
– sensor accuracy ±1.8 %RH at 23 ºC in the range of (0 to 90) %RH
– hysteresis < ±1 %RH – non-linearity < ±1 %RH – temperature error: see diagrams in Annex 7
Barometric pressure: ± 1.3 hPa at 23 °C CO2 concentration in the air:
50 + 0.03 × MV [ppm CO2 at 23 °C and 1013 hPa] Temperature dependency in range -20…45 °C:
typ. ± (1 + MV / 1000) [ppm CO2/°C] MV…measured value Dew-point temperature: ±1.5 °C at an ambient
temperature of T< 25 °C and RH >30 %. For details see diagrams in Annex 3.
Response time (air flow 1 m/s approx.) (*2):
Temperature: t63 < 2 min, t90 < 8 min (temperature step 20 °C)
Relative humidity: t63 < 45 s, t90 < 4 min, t99 <4 h. (Measured at and constant temperature for 30% humidity step)
Barometric pressure: t90 <44s
CO2 concentration in the air: according to the set CO2 Measuring interval (2 min / 10 min)
Display resolution:
Temperature incl. dew-point temperature: 0.1 °C Relative humidity: 0.1 %RH Barometric pressure: 1 hPa CO2 concentration in air: 1 ppm
Recommended calibration interval: 1 year
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(1) During battery charging temporary measurement inaccuracy can occur.
(2) Important information is provided in the chapter “Models produced ­ U4440M, U4440G”
U5841M, U5841G ____
Measured values:
3 x voltage (0 ­ 10) V 1 x binary input. This input can be configured to voltage or a dry contact (with open collector transistor acceptance). Unlike the U0843M (U0843G) model, this input can capture connected/disconnected voltage status.
Range and input levels:
Voltage inputs:
Range: (0 to 10) V DC Accuracy: ± 10 mV Input resistance: approx. 130 k Binary input configured for voltage signal: Input voltage for the “L” level: < 0.8 V() Input voltage for the “H” level: > 2 V Minimum applicable voltage: 0 V Maximum applicable voltage: +30 V DC () When the input is disconnected, the device will measure the “L” level. Binary input configured for a dry contact or an opencollector transistor: Contact resistance for the “switched-on” state:
< 10 k Contact resistance for the “switched-off” state:

2 M Excitation voltage: approx. 3 V Minimum state duration necessary for latching
the state: 1s
Connection: Pluggable terminal block, maximum wire cross section 1.5 mm2. The maximum cable length is 30 m. It is recommended to use shielded cables.
CAUTION: The inputs are not galvanically isolated!
Recommended calibration interval:
2 years

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U6841M, U6841G ____
Measured values:
3x current input, 1 x binary input. This input can be configured to voltage or a dry contact (with open collector transistor acceptance). Unlike the U0843M (U0843G) model, this input can capture connected/disconnected voltage status.
Range and input levels:
Current input:
Range: (0 to 20) mA DC Accuracy: ± 20 µA Resolution: better than 1 µA Input resistance: approx. 100 Minimum current: 0 mA (open circuit) Maximum current: limited to approx. 40 mA
Binary input configured for voltage signal: Input voltage for the “L” level: < 0.8 V() Input voltage for the “H” level: > 2 V Minimum applicable voltage: 0 V Maximum applicable voltage: +30 V DC () When the input is disconnected, the device will measure the “L” level.
Binary input configured for a dry contact or an opencollector transistor:
Contact resistance for the “switched-on” state: < 10 k
Contact resistance for the “switched-off” state: > 2 M
Excitation voltage: approx. 3 V Minimum state duration necessary for latching
the state: 1 s
Connection: Pluggable terminal block, maximum wire cross section 1.5 mm2. The maximum cable length is 30 m. It is recommended to use shielded cables.
CAUTION: The inputs are not galvanically isolated!
Recommended calibration interval: 2 years

U7844M, U7844G ____
Measured values: 2x user configurable binary input for voltage or dry contact (as e.g. an open-collector transistor). Unlike

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the U0843M (U0843G) model, this input is able to catch also the “voltage applied/not applied” states.
2 x counting input. This input, like the binary one, can be configured to voltage or dry contact (as e.g. an opencollector transistor). These counting inputs can be used as additional two binary ones.
Input levels:
Binary or counter input configured for voltage measurements:
Input voltage for the “L” level: < 0.8 V() Input voltage for the “H” level: > 2 V Minimum applicable voltage: 0 V Maximum applicable voltage: +30 V DC () When the input is disconnected, the device will measure the “L” level.
Binary or counter input configured for a dry contact or an open-collector transistor:
Contact resistance for the “switched-on” state: < 10 k
Contact resistance for the “switched-off” state: > 2 M
Excitation voltage: approx. 3 V Minimum state duration necessary for latching
the state: 1 s
Counter parameters:
Range: 24 bits (16 777 215), possibility of letting the counter overflow
Maximum pulse frequency when configuring for:
– voltage input: max. 5 kHz – dry contact or open collector transistor:
max. 200 Hz Further features: relative counter (count of pulses
sensed during the recording interval)
Connection:
Pluggable terminal block, maximum wire cross section 1.5 mm2. The maximum cable length is 30 m. It is recommended to use shielded cables.
CAUTION: The inputs are not galvanically isolated!

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U8410M, U8410G ____
Measured values: Concentration of CO2 in the air.
Ranges: Concentration of CO2 in the air: 0 to 5000 ppm (it is possible to deliver the device with the range of 0 to 10000 ppm as optional)
Accuracy: CO2 concentration in the air: 50 + 0.03 × MV [ppm CO2 at 23 °C and 1013 hPa] Temperature dependency in range -20…45 °C: typ. ± (1 + MV / 1000) [ppm CO2/°C] MV…measured value
Response time (air flow 1 m/s approx.) (1): CO2 concentration in the air: according to the set CO2 Measuring interval (2 min / 10 min) (1) Important information is provided in the chapter “Models produced ­ U8410M, U8410G”
Display resolution: CO2 concentration in air: 1 ppm
Recommended calibration interval: 5 years

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Operating and storage conditions
Operating temperature: (-20 to +60) °C Range of the display visibility: (-10 to +60) °C
Operating humidity: (0 to 95) %RH without permanent condensation for models with CO2 sensor (0 to 100) %RH without long-lasting condensation for other models
Operating pressure: (700 to 1100) hPa for models with CO2 sensor (600 to 1100) hPa for other models
Operating environment: chemically non-aggressive
Storage temperature: (-20 to +45) °C
Storage humidity: (5 to 90) %RH
Mechanical properties
Dimensions (h x w x d): 93 x 61 x 53 (55) mm without connected cables and connectors The data is without connected cables and connectors. More detailed drawings you find in the chapter “Dimensions”.
Mass: Approx. 270 g including batteries
Case material: Polycarbonate LEXAN EXL1434T resin

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Ingress protection:

Device type
U0110M, U0110G U0121M, U0121G U0141M, U0141G U3121M, U3121G U3120M, U3120G U3631M, U3631G U4440M, U4440G U0141TM, U0141TG U0246G U0843M, U0843G U5841M, U5841G U6841M, U6841G U7844M, U7844G U8410M, U8410G

Protection class
case with Temperature electronics and rel. humidity
sensor

IP67(*)

—

IP67(*) IP20

IP30 IP20

IP20

—

(*) To reach this ingress protection, the device cover screws must be properly tightened, the USB connector must be provided with a closing cap, and all connector screws must be tightened. A connector that is not used must be provided with a closing cap.

Optional accessories: LP100 – lockable datalogger holder for wall mounting

Declaration of conformity
This datalogger is in compliance with the requirements of Directive 2014/35/EU. The original Declaration of Conformity can be found on the manufacturer’s website www.cometsystem.com.

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Dimensions
U0110M, U0110G U8410M, U8410G
U0121M, U0121G

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U0141M, U0141G
U3120M, U3120G U4440M, U4440G

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U3121M, U3121G U3631M, U3631G

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U0141TM, U0141TG U0246G U0843M, U0843G U5841M, U5841G U6841M, U6841G U7841M, U7841G
Probe connection

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Annexes
Annex 1: Selected error messages of the device

Error Error 1 Error 2 Error 3
Error 5 Error 9 Error 10 Error 11
Error 13 Error 14 Error 15 Error 16
Error 17
Error 18
Error 19

Description and debugging
A/D converter is at low limit, 0x0000. Contact support.
Temperature probe is not connected, or cable is damaged.
Internal converter communication error. Contact support.
Few valid measured values for calculating the average value for the recording interval (more than 1/8 of invalid values were measured from the given recording interval).
Measured value is out of range or probe is shorted.
The device is switched off, measured values are not available.
No valid data of the counter, batteries missing in the device. Reset the counter content by means of the SW, repeat the measurement.
CO2 concentration sensor is not available, or it does not work correctly. Have the device repaired. This applies to the CO2 concentration sensor devices only.
The measured CO2 value is not available due to low battery voltage. Recharge the battery.
The digital T / RH probe does not communicate with the instrument. Check its connection.
The digital T/RH probe memory does not communicate with the instrument. Contact support.
Measured value is not available. In device U3121M (U3121G) check, and, if needed, replace the Digi/E probe connected. In the other models a device failure may be suspected.

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Error
Error 20
Error 21
Error 22
Error 23 Error 50, Error 52, Error 55
Error 51 Error 56 Error 57 Error 128 Error 255

Description and debugging
The source value of the calculated quantities is not available. Check in the SW whether measurement values are available (temperature and relative humidity) for this calculated quantity in question (e.g. the dew-point temperature).
Calculation failure, incorrect device calibration. Have the device repaired.
Counter overflow in the case that in the device configuration it is required to report this as a failure. Reset the counter by means of the SW, or as the case may be change the setting for the overflow limit.
Thermocouple cold junction temperature measurement error. Check if the internal temperature measurement channel is turned on for measurement.
Device configuration failure, corrupted configuration. Read the configuration into the SW, check for the correct setting of all items, save the configuration in the device again.
The Digi/E series probe contains invalid calibration constants. Get the probe repaired or contact the producer.
The value is not defined, the measurement on the given channel is switched off.
The value has not been measured yet, the first measurement is waiting to be completed.
Error massages generated during communication with the device. Repeat the communication, contact the producer.

Annex 2: Connection of the Pt1000/E series probe connector

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Annex 3: Accuracy of the dew-point temperature measurement

Annex 4: Connecting the wires to the terminals
Some inputs are equipped with a two-part WAGO terminal block. Connect the wires to the block with either the supplied SP013 or a screwdriver corresponding to the size: insert a screwdriver into the pluggable terminal block’s angular opening situated above the circular opening. Open the connector by turning the screwdriver moderately, insert the wire and close the connector by subsequent disengaging the screwdriver. See the illustration.
The pluggable terminal block can be taken out of the device without the necessity of disconnecting any wire.

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Annex 5: Calculated channels

Depending on the device type, up to three calculated channels (i.e. the channels that can be used to calculate and record the values calculated from the measured values) are available. For each calculated channel, the user can choose the type of calculation equation from the following options:
· AX + BY + C · AXY + C · AX/Y + C · AX2 + B*Y + C where A, B, C are user-defined constants, X, Y is an optional value measured by the device on the selected channel (e.g. temperature, humidity, …, according to the device type).
Overview of available the Calculated channels by the device type (named as “Calculated”):

Models
U0110M U0110G U0121M U0121G U0141M U0141G U0141TM U0141TG
U0246G
U0843M U0843G U3120M U3120G U3121M U3121G U3631M U3631G U4440M U4440G U5841M U5841G U6841M U6841G U8410M U8410M

Channel 1 Channel 2 Channel 3 Channel 4 Channel 5 Channel 6 Channel 7

T

—

—

—

—

—

—

T1

T2

T1-T2

Calculated

—

—

—

T1

T2

T3

T4

Calculated Calculated

—

Tc1

Tc2

Tc3

T4

Tint

Calculated Calculated

T1

T2

T1-T2

BIN_IN3 BIN_IN4 Calculated

—

T

RH

Td

Calculated

—

—

—

T

RH

Td

Calculated

—

—

—

Tint

RH

Td

Text

Text-Td Calculated

—

T

RH

Td

Pressure CO2

Calculated

—

U1

U2

U3

BIN_IN4 Calculated Calculated Calculated

I1

I2

I3

BIN_IN4 Calculated Calculated Calculated

CO2

—

—

—

—

—

—

Note: All channels of the device U7844M (U7844G) are occupied, so no calculated channel is available.

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Annex 6: SMS message format

SMS message format for SYSTEM ALARM:
The message header includes: SYSTEM ALARM “Description of the device DescDev”” Depending on the type of alarm, the corresponding text:
Data memory limit overflow, Battery warning, Battery empty, Battery Ok, External power lost, External power Ok; Date/Time Error, Date/Time Ok; Measuring Error on input: ….; Measuring Error END on input: …., Configuration error, Configuration Ok, The time of the event, such as “20170808 10:44”
Texts are fixed, user-immutable, if multiple events occur simultaneously and the length of the message exceeds 160 characters (max message length), then they will be divided into multiple messages.

Format of alarm SMS message from measured value:

Description of the device DescDev …. max. 32 chars

Name of the measured location: max. 16 chars

Text “Actual value: measured value + unit (or binary input status)

Text ¨ALARM¨ or (Text “ALARM END”)

Description of the alarm:

max. 16 chars

Separator comma + gap

Start time / end time of the alarm, such as 2016/05/08 10:44

Text “ALARM” (Text “ALARM END”)

In the case of other alarms followed by and continues with information

about the next alarm

Description of the alarm:

max. 16 chars

Separator comma + gap

2 chars

Start time of the alarm, such as 2016/05/08 10:44

: :

: :

The length of one message is limited to 160 characters, if there is a requirement

to send more characters, the characters are divided into more messages.

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DataKeepAliveSMS format (suitable for automated data processing):
All data coded into ASCII, it means 1 Byte will be sent as 2 ASCII characters. (hex. value 0x9E will be sent as two ASCII characters `9′ ‘E’)

Initial text “Datalogger”

10 ASCII chars

Space

1 ASCII char

Serial number

(4 byte i.e. 8 ASCII chars)

Space

1 ASCII char

Text “ActualData”

10 ASCII chars

Space

1 ASCII char

Device Kind

(1 byte i.e. 2 ASCII chars)

Space

1 ASCII char

Status (AState)

(2 byte i.e. 4 ASCII chars)

Space

1 ASCII char

Memory occupation [%]

(1 byte i.e. 2 ASCII chars)

Space

1 ASCII char

Alarm I states on all chan.: (1 byte i.e. 2 ASCII chars)

Space

1 ASCII char

Alarm II states on all chan.: (1 byte i.e. 2 ASCII chars)

Space

1 ASCII char

Actual values of all 8 chan. in IEEE Float format:

(8×4=32 byte i.e. 64 ASCII chars)

Space

1 ASCII char

Units 3 char per channel

(3×8 = 24 ASCII chars)

Space

1 ASCII char

Value of the mobile operator signal level CsqRssi

(1 byte i.e. 2 ASCII chars)

Space

1 ASCII char

Index of the currently set sending interval KeepAlive SMS

(1 byte i.e. 2 ASCII chars)

Space

1 ASCII char

Time

32b time information, always 8 ASCII chars

Total sends:

152 ASCII chars

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HumanKeepAliveSms format:
The Text of the message is gradually consisting of the items in the order below. The length of this report is limited to max 160 characters. If the message was longer, then it sends only the first 160 characters.
The format of the message: – description of the device from the configuration: max. 32 chars – … 2 chars – according to the device configuration, the current value and the unit are
inserted for each channel switched on for measurement. If Alarm1 is active at the same time, then “!” is inserted BEFORE CURRENT VALUE. If Alarm2 is also active, then “!” is inserted AFTER UNIT (e.g. “!25.3%!” means that Alarm1 and Alarm2 are active). – … 2 chars – information about the state of memory occupation – … 2 chars – information about the state of the battery – … 2 chars – information about the level of the mobile operator signal – … 2 chars – inserts the current time of the device – … 2 chars
Watching the daily limit of SMS sent:
When a request to send an SMS occurs (for example an alarm occurred), the number of already sent SMS messages is checked for the given day. It monitors both the messages sent per day (the sum of the SMS sent when the power supply from battery or external power supply) and the number of messages sent when the power supply from battery. Both limits can be set using the user’s SW. If the daily limit of the sent messages was reached, then instead of the alarm SMS is send to the given number different the notification SMS about exceeding the daily limit and sending of additional SMS to that number will stop. The counters of the daily limit of sending SMS are reset at midnight (0:00).

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Annex 7: Typical tolerance of the % RH measurement

RH 100 [%] 90

< 3 %RH

80

70

60

50 < 7 %RH 40

< 1.8 %RH

< 5 %RH

30

20

10

0 -20 -10

0 10 20 30 40 50 60 70 80 T [°C]

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References

• Manufacturer of Dataloggers, Thermometers, Hygrometers,CO2 meters
• Výrobce snímačů teploty, vlhkosti, atmosférického tlaku, dataloggerů, monitorovacích systémů

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