COMET U0121M Dataloggers with GSM Modem User Manual
- June 6, 2024
- COMET
Table of Contents
COMET U0121M Dataloggers with GSM Modem
PRODUCT DESCRIPTION
The dataloggers UxxxxM are designed for measuring and recording physical and electric quantities with an adjustable logging interval from 1 second to 24 hours. The measured values (instantaneous or the average, minimum and maximum values detected during the recording interval) are stored in the internal non- volatile memory. The data logging mode can be cyclic (when the data memory is completely full, the oldest data are overwrite by the new ones), or non-cyclic (the recording will stop once the memory is full). For each measured value it is possible to set two alarm limits. The alarms are signalled by the symbols on the LCD display, by flashing the LED, by acoustic or by sending a warning SMS message. The data recording can be performed continuously or only when an alarm occurs.
GSM modem is a part of each datalogger. Modem is used to send SMS messages to up to four selected recipients and to send the measured values using JSON messages, e.g. to the COMET Cloud. In addition to alarm warning messages, SMS messages containing current measured values and alarm statuses can be sent at regular intervals.
Device setting, data downloading and online monitoring are carried out using the computer with the COMET Vision software installed (see www.cometsystem.com). The USB interface is used to communicate with the computer.
The datalogger is powered by an internal Li-Ion battery. The device includes a charging circuit, which is activated automatically when a standard USB charger is connected or after connecting a device to a computer. The charging takes place if the battery condition requires it and the internal temperature of the device is in the range 0 and 40 ºC. Fast charge mode can be run by turning off the device.
| Device type | Measured values | Construction |
|---|---|---|
| U0110M | Ti | Internal temperature sensor |
| U0121M | 2 x Te + 1x cc | Connectors for two external Pt1000/E probe |
connection
U0141M| 4 x Te + 2x cc| Connectors for up to four external Pt1000/E
probe connection
U3120M| Ti + RH + Td + 1x cc| Internal temperature and relative humidity
sensor
U3121M| Te + RH + Td + 1x cc| Connector for an external Digi/E probe
connection
U3631M| Ti + Te + RH + Td + 1x cc| Internal temperature and relative
humidity sensor and connector for Pt1000/E probe connection
U4440M| Ti + RH + Td + P + CO2 + 1x cc| Internal sensors of temperature,
relative humidity, barometric pressure and CO2 concentration
U8410M| CO2| Internal sensor of CO2 concentration
Ti, Te…Temperature, RH…Relative humidity, Td…Dew point temperature, P…
Barometric pressure, CO2… CO2 concentration
cc… calculated channel, ie the channel that can be used to calculate and
record the value calculated from the measured quantities according to the
selected formula
INSTALLATION AND OPERATION
Insert the micro-SIM card for the 2G network into the device (see other side of this sheet). Use a card with parameters conforming to the expected number of sent SMS messages and amount of received and transmitted data. If the SIM card is protected by PIN code, make a note it, and later insert this code into the device configuration. Proceed with care and avoid contact of the external conductive parts with the electronics of the device (the datalogger is constantly supplied from the internal battery). An optional accessory is a prepaid IoT SIM card (order code LP105) for sending data to the COMET Cloud. Please note that this card does not support the sending of SMS messages. The UxxxxMsim kit (datalogger with built-in IoT SIM card) allows the instant connection to the COMET Cloud.
Fasten the device on the wall with two screws or insert it into the wall holder LP100 (optional accessory). Datalogger may be operated as a portable one. In this kind of operation avoid the device falling down. Try to maintain the proper working position.
- The dataloggers always install vertically (with the antenna facing up) into locations with sufficient GSM signal quality. Insufficient signal level can be in reinforced concrete buildings, metal chambers and other shielded areas.
- Connect the probes to the device (maximum length of cables should not exceed 30 m, recommended cable length of the Pt1000/E probe is 15 m)
- The devices with all cables should be located as far as possible from potential interference sources
Set-up the device
- Connect the datalogger with attached probes to the computer. Use an USB cable with USB-C connector (max. cable length 3 m).
- Run the installed COMET Vision software and select the device you want to set up from the device list
- Click on the Configuration button. The device configuration will be downloaded and you can change the setup of individual items.
- Finally save the new configuration into the device (Apply changes)
The devices do not require special maintenance. We recommend verifying the measurement accuracy regularly by calibration.
SAFETY INSTRUCTIONS
- Read carefully the Safety information for dataloggers with GSM modem before operating the device and observe it during use!
- Installation, electrical connection and commissioning should only be performed by qualified personnel in accordance with applicable regulations and standards
- Devices contain electronic components, it needs to liquidate them according to currently valid conditions.
- To complement the information in this data sheet read the manuals and other documentation, which are available in the Download section for a particular device at www.cometsystem.com
COMET SYSTEM, s.r.o. Bezrucova 2901 756 61 Roznov pod Radhostem, Czech
Republic
Specifications are subject to change without notice IE-LGR-N-UxxxxM-14
Technical Specification
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