COMET T3110Ex Temperature and Humidity Outdoor Indoor Probe Instruction Manual

T3110Ex Temperature and Humidity Outdoor Indoor Probe
Instruction Manual

The programmable transmitter of temperature, relative humidity, and other calculated humidity values with 4 – 20 mA outputs

© Copyright: COMET SYSTEM, Ltd.
It is prohibited to copy and make any changes in this manual, without the explicit agreement of company COMET SYSTEM, Ltd. All rights reserved.
COMET SYSTEM, Ltd. makes constant development and improvement of their products. The manufacturer reserves the right to make technical changes to the device without previous notice. Misprints reserved.
The manufacturer is not responsible for damages caused by using the device in conflict with this manual.
Damages caused by using the device in conflict with this manual cannot be provided free repairs during the warranty period.
Read carefully instruction manual before the first device connection.
Contact address of this device’s producer:

COMET SYSTEM, s.r.o.
Bezrucova 2901
756 61 Roznov pod Radhostem
Czech Republic
www.cometsystem.com

General description

The transmitters T3110 are designed for the measurement of ambient temperature and relative humidity of air without aggressive substances.
Measured values are converted to other humidity interpretations: dew point temperature, absolute humidity, specific humidity, mixing ratio, and specific enthalpy.
Measured and computed values are displayed on a two-line LCD display.
The first line displays the temperature (ºC / ºF). Value displayed on the second line is selectable among relative humidity and computed value. It is also possible to display both readings with cyclic overwriting (4 seconds interval) or to switch off the LCD display at all.
The transmitter communicates by means of two galvanically separated current loops 4-20mA. Each loop has a two-wire connection and each loop requires power from the evaluation device. It is always necessary to connect loop I1 which is designed for supplying of measuring part of the device. Using the configuration software can be assigned to each current loop any measured or computed value.
All transmitter setting is performed by means of the PC connected via the optional SP003 communication cable (not included in delivery). Using TSensor software (see  www.cometsystem.com) you can assign to each output any measured or computed value and set its measuring range. It is also possible to assign both outputs to the same value (with the same range), if two evaluation devices are necessary to connect. The program supports making the adjustment to the device too. This procedure is described in file
„Calibration manual.pdf“ which is installed commonly with the software.

Device versions:

gland for easy connection/disconnection of the  output cable (protection IP67)
T3110Ex| intrinsically safe transmitter for use in potentially explosive environments
T3110Z| this marking is intended for non-standard versions of the transmitters. The description is not included in this manual.

T3110Ex transmitter

Transmitter T3110Ex is designed and certified for use in hazardous areas.
In compliance with European Directive 2014/34/EU (ATEX) the T3110Ex transmitter conforms to European Standards EN 60079-0:2018 and EN 60079-11:2012.
The transmitter is suitable for use in potentially explosive atmospheres (Apparatus Groups LLC) in applications requiring devices category 3G.
Type Examination Certificate number FTZÚ 13 ATEX 0189X is available at www.cometsystem.com.

Factory settings

If a special setting was not required in the order device is set from the manufacturer to the following parameters:

value at output I1:| relative humidity range 4-20 mA corresponds to 0 to 100 %RH
---|---
value at output I2:| temperature range 4-20 mA corresponds to -30 to +80 ºC
display:| switched ON
temperature unit:| °C
the value displayed in line 2:| relative humidity

Device installation

Devices are designed for wall mounting. There are two mounting holes at the sides of the case. Working position is with sensor cover downwards.

The connecting terminals are accessible after unscrewing the four screws in the corners of the case and removing the lid. Pass the connecting cable through released gland and connect the wires to terminals (see “Typical application wiring”). Tighten the gland and screw the lid (check the integrity of the seal). The female connector for connecting the T3110L transmitter connects according to the diagram at “Typical application wiring”.
For device connection, it is recommended to use a shielded cable with a maximum length of 1200m. The external diameter of the cable for the T3110 and T3110Ex connection is 4 to 8  mm. For T3311L connection use cable with respect to female connector parameters (do not connect shielding at connector side). When selecting the type of cable for  T3110Ex connection and when choosing a location for T3110Ex mounting it is necessary to observe the conditions for safe installation in potentially explosive environments.  The cables should be located as far as possible from potential interference sources.
It is not recommended to use the device for a long time under condensation conditions or water aerosol conditions. It could be the cause of water steam condensation inside the sensor’s cover with a consequential increase in response time to humidity changes. It can cause sensor damage too.

Devices don´t require special operation and maintenance. It is recommended to keep a clean sensor cover and periodically to verify the accuracy of measurement.

Warning

• Installation, commissioning, and maintenance may only be carried out by personnel with qualifications by applicable regulations and standards.
• The ambient temperature of the housing with electronics of the T3110Ex transmitter is not allowed to exceed 60 ºC.
• Don´t connect the transmitter while the power supply voltage is on.
• Under certain extreme circumstances, the plastic enclosure of the T3110Ex transmitter may store an ignition-capable level of electrostatic charge.
  The device shall not be installed in a location where the external conditions are conducive to the build-up of electrostatic charge. The equipment shall only be cleaned with a  damp cloth.

Info mode

Several settings of installed transmitters are possible to verify without the use of the computer. It is necessary to connect at least the power of current loop I1.
Unscrew the transmitter lid and shortly press the button between the display and interconnection terminals by means of a tool (e.g. screwdriver).

The LCD display shows the type of value assigned to 1. output (here „%RH“ = relative humidity and „1“ = loop I1). The upper line displays the value of the current corresponding to the measured value on the lower line (here 4 mA corresponds to 0 %RH).

Press the button again to get the value for the upper point of the 1. output (here „%RH“ = relative humidity and 1“ = loop 1). The upper line displays the value of the current corresponding to the measured value on the lower line (here 20 mA corresponds to 100 %RH).

After the next press of the button LCD display shows the type of value assigned to 2. output (here „ºC“ = temperature and „2“= loop I2). The upper line displays the value of the current corresponding to the measured value on the lower line (here 4 mA corresponds to 30ºC).

Press the button again to get the value for the upper point of the 2. output (here „ºC“ = temperature and „2“ = loop 2). The upper line displays the value of the current corresponding to the measured value on the lower line (here 20 mA corresponds to 80 ºC).

Press the button again to end info mode and display actual measured values.

Warning

• During info mode, no measurement and no output current generation proceed. The transmitter stays at info mode for 15 s and then automatically goes back to the measuring cycle.
• The verifying of settings of the T3110Ex transmitter is permitted only in non-hazardous areas.

Modification of device adjustment

Device adjustment is performed by means of the optional SP003 communication cable, connected to the USB port of the PC. It is necessary to have installed the configuration program Tensor on the PC (the program is free to download at www.cometsystem.com). During installation please take care of the installation of the driver for the USB communication cable.

• unscrew four screws of the device lid and remove the lid. If the device is already installed in the measuring system, disconnect wires from terminals

• to connect the SP003 communication cable to the PC. Installed USB driver to detect connected to cable and create a virtual COM port inside the PC

• run installed Tensor program and continue in accordance with his instructions

• when a new setting is saved and finished, disconnect the cable from the device, connect wires to its terminals and place the lid back on the device

Warning

• Modification of adjustment of the T3110Ex transmitter using a cable SP003 is permitted only in non-hazardous areas.

Error states of the device

The device continuously checks its state during operation. In case the error is found LCD displays the corresponding error code:

Error 0 – first line displays „Err0“ (output current value is < 3.8 mA). Check sum error of stored setting inside device’s memory. This error appears if an incorrect writing procedure to the device’s memory occurred or if damage to calibration data appeared. At this state, the device does not measure and calculated values. It is a serious error, contact the distributor of the device to fix it.

Error 1 – there is a reading „Err1“ on the LCD display (output current value is > 22 mA). The measured or computed value is higher than the upper limit.
This state appears in the case of:

• the measured temperature is higher than approximately 600 °C (i.e. high non-measurable resistance of temperature sensor, probably opened circuit)
• relative humidity value is higher than 100 %, i.e. damaged humidity sensor or humidity calculation of humidity is not possible (due to error during temperature measurement)
• calculation of the computed value is not possible (error during measurement of temperature or relative humidity or value is over range)

Error 2 – there is a reading „Err2“ on the LCD display (output current value is < 3.8 mA). The measured or computed value is below the lower limit of the allowed full-scale range. This state  appears in the case of:

• measured temperature is lower than approximately -210 °C (i.e. low resistance of temperature sensor, probably a short circuit).
• relative humidity value is lower than 0 %, i.e. damaged sensor for measurement of relative humidity, or calculation of relative humidity is not possible (due to error during  temperature measurement)
• calculation of the computed value is not possible (error during measurement of temperature or relative humidity)

Error 3 – there is a reading „Err3“ on the LCD display upper line. The error of the internal A/D converter appeared (converter does not respond, probably damage of A/D converter). No measurement and calculations of values proceed. It is a serious error, contact the distributor of the instrument.

Technical support and service

Technical support and service are provided by the distributor. For contact see the warranty certificate. You can use the discussion forum at the web address www.forum.cometsystem.cz.

Technical data

Measured values

Temperature:

Accuracy:|  ±0.4 °C
Measuring range:| -30 to +80 °C
Resolution:|  0.1 °C
Response time:| t90 < 7 min (temperature step 20 ºC)

Relative humidity:

Relative humidity:|
---|---
Accuracy:|  ±2.5 %RH from 5 to 95 %RH at 23 °C
Measuring range:| 0 to 100 %RH
Resolution:|  0.1 %RH
Response time:| t90 < 30 s (humidity step 65 %RH, constant temperature

Calculated humidity values

Dew point temperature::|
---|---
Accuracy:|  ±1.5 °C at ambient temperature T < 25 °C and RH > 30  %, for more details see graphs
 Measuring range:| -60 to +80 ºC

Absolute humidity:|
---|---
Accuracy:|  ±1.5 g/m3  at ambient temperature T < 25 °C, for more details see the graph
 Measuring range:| 0 to 400 g/m3

Specific humidity
This value depends on atmospheric pressure. Pressure for quantities calculation is stored in device memory. The default value is 1013hPa and can be changed by software.

Mixing ratio

This value depends on atmospheric pressure. Pressure for quantities calculation is stored in device memory. The default value is 1013hPa and can be changed by software.

Specific enthalpy

This value depends on atmospheric pressure. Pressure for quantities calculation is stored in device memory. The default value is 1013hPa and can be changed by software.

General

Power supply voltage:
9 to 30 Vdc

Current output in case of error:
< 3.8 mA or > 22 mA

Recommended calibration interval:
1 year (relative humidity 1 year, temperature 2 years)

Protection:
housing with electronics IP65, sensors are located in cover with IP40 protection

Storage temperature range:
-30 to +80 °C

Storage relative humidity range:
5 to 95 %RH (no condensation)

Certification of T3110Ex transmitter:

Compliance with standards: EN 60079-0:2018 and EN 60079-11:2012
Intrinsically safe parameters of current loops I1 and I2: Ui = 30 V, Ii = 100 mA, Io = 22 mA, Ci ~ 0, Li ~0
Special condition for safe use (sign “X”): Under certain extreme circumstances, the plastic enclosure may store an ignition-capable level of electrostatic charge. The device shall not be installed in a location where the external conditions are conducive to the build-up of electrostatic charge. The equipment shall only be cleaned with a damp cloth.
Electromagnetic compatibility:
EN 61326-1
Weight:
approximately 150 g
Housing material:
ASA

Operating conditions

Temperature operating range of the housing with electronics:

Ambient temperature range of the housing with electronics:

-30 to +60 ºC T3110Ex

Temperature operating range of the measuring end of stem:
-30 to +80 ºC

Relative humidity operating range:
0 to 100 %RH (no condensation)

End of operation

Dispose of the device according to statutory regulations.

Dimensions

T3110
T3110Ex

T3110L

Typical application wiring

T3110

Loop resistance value Rc = Rm + resistance of wires shall
fulfill the condition Rc[Ω] < 40 x Uss[V] – 360.

T3110Ex

Loop resistance value Rc = Rm + Rs + resistance of wires
shall fulfill the condition Rc[Ω] < 40 x Uss[V] – 360.
Intrinsically safe parameters of the transmitter:
Ui = 30 V, Ii = 100 mA, Io = 22 mA, Ci ~ 0, Li ~ 0

T3110L

Loop resistance value Rc = Rm + resistance of wires shall
fulfill the condition Rc[Ω] < 40 x Uss[V] – 360.

References

• Manufacturer of Dataloggers, Thermometers, Hygrometers,CO2 meters
• Comet system forum

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