Comet T5140 Manuale utente
www.cometsystem.com
Instruction Manual
T5140
T5141
T5145
Programmable transmitter of CO2concentration
with 4-20 mA output
T5240
T5241
T5245
Programmable transmitter of CO2concentration
with 0-10 V output
2IE-SNC-T51(2)XX-05
©Copyright: COMET SYSTEM, s.r.o.
It is prohibited to copy and make any changes in this manual, without explicit
agreement of company COMET SYSTEM, s.r.o. All rights reserved.
COMET SYSTEM, s.r.o. makes constant development and improvement of
their products. Manufacturer reserves the right to make technical changes to
the device without previous notice. Misprints reserved.
Manufacturer is not responsible for damages caused by using the device
in conflict with this manual.
To damages caused by using the device in conflict with this manual can not
be provide 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
IE-SNC-T51(2)XX-05 3
Table of contents
GENERAL DESCRIPTION.........................................................................4
FACTORY SETTINGS ...............................................................................5
DEVICE INSTALLATION...........................................................................6
MODIFICATION OF DEVICE ADJUSTMENT............................................7
INFO MODE...............................................................................................8
ERROR STATES OF THE DEVICE ...........................................................9
TECHNICAL SUPPORT AND SERVICE..................................................10
TECHNICAL DATA..................................................................................11
T5140 –AMBIENT AIR CO2TRANSMITTER ........................................ 11
T5240 –AMBIENT AIR CO2 TRANSMITTER......................................... 11
T5141 –CO2 TRANSMITTER WITH EXTERNAL PROBE..................... 12
T5241 –CO2 TRANSMITTER WITH EXTERNAL PROBE..................... 12
T5145 –CO2 DUCT MOUNT TRANSMITTER........................................ 13
T5245 –CO2 DUCT MOUNT TRANSMITTER........................................ 13
GENERAL............................................................................................... 14
OPERATION CONDITIONS ................................................................... 15
END OF OPERATION ............................................................................ 15
DIMENSIONS.......................................................................................... 16
TYPICAL APPLICATION WIRING.......................................................... 21
OPTIONAL ACCESSORY .......................................................................23
4IE-SNC-T51(2)XX-05
General description
The transmitters are designed for measurement of carbon dioxide
concentration of air without aggressive ingredients.
T5140 ambient CO2 transmitter with 4 –20 mA output
T5240 ambient CO2 transmitter with 0 –10 V output
T5141 CO2 transmitter with cable probe with 4 –20 mA output
T5241 CO2 transmitter with cable probe with 0 –10 V output
T5145 duct mount CO2 transmitter with 4 –20 mA output
T5245 duct mount CO2 transmitter with 0 –10 V output
A multiple point CO2 and temperature adjustment procedure leads to
excellent CO2 measurement accuracy over the entire temperature working
range; this is a must for process control and outdoor applications. The dual
wavelength NDIR CO2 sensing procedure compensates automatically for
ageing effects. The CO2 module is highly resistant to pollution and offers
maintenance free operation and outstanding long term stability. Measured
values can be read in „SLOW mode“ (filtered, averaged) or in „FAST mode“
(current values without averaging). SLOW mode has advantages in
applications like climate control because of filtering short time peaks. As an
example exhaled air from an employee passing the sensor could affect the
climate control negatively with a short response time because the control
would trigger a change of the ventilation based on this one-time
measurement. On the contrary in „FAST mode“ no software filter is used for
calculating the output value. This fact adds a noise of typ. ±30ppm which has
to be considered in terms of accuracy. Of principle measurement is the
measured value of CO2concentration depends on the value of air pressure
- altitude at the installation site. For this reason, it is suitable for accurate
measurement to set the altitude of the installation site by TSensor software
(is available to download free www.cometsystem.com).
Measured values are displayed on dual line LCD display. The visual
indication of CO2concentration is provided by three-color LED.
After power up of the device starts internal test. During this time (about 20s)
LCD display shows (----) instead of CO2concentration value.
For setting of all parameters of the transmitter serves the user program
TSensor. Cable SP003 (optional accessory) use for connection the device to
a personal computer.
Device version TxxxxL with watertight male connector instead of a cable
gland is designed for easy connection/disconnection of the output cable.
Models marked TxxxxZare non-standard versions of the transmitters.
Description is not included in this manual.
IE-SNC-T51(2)XX-05 5
Factory settings
If special setting was not required in the order, the device is set from the
manufacturer to the following parameters:
4 - 20 mA output: corresponds 0 to 2000 ppm (T5140 a T5145)
corresponds 0 to 10 000 ppm (T5141)
0 - 10 V output: corresponds 0 to 2000 ppm (T5240 a T5245)
corresponds 0 to 10 000 ppm (T5241)
measurement mode: „SLOW“
display:switched ON
LED indication: up to 1000 ppm lights green LED
from 1000 ppm to 1200 ppm lights yellow LED
over 1200 ppm lights red LED
altitude: 300 m above sea level at the installation site
Modification of the setting is possible to do by means of the PC and
TSensor program.
6IE-SNC-T51(2)XX-05
Device installation
The housing with electronics of the T5140 (T5240) or T5141 (T5241)
transmitter is designed for wall mounting with two screws or bolts.
The T5145 (T5245) transmitter install by
inserting the metal stem into the Pg21 cable
gland so that the measured air was fed into the
head of device (see picture). To fasten the stem
it is also possible to use the flange PP4 or PP90
(see „Optional accessory”).
The external CO2probe unpack and connect to
the T5141 (T5241) device. Then place the
probe into the measured environment.
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”). By jumper J1 select galvanically or non-galvanically
isolated output (T5140, T5141 and T5145). Tighten the gland and screw the
lid (check the integrity of the seal). The female connector for connecting
TxxxxL transmitter connect according to the diagram at „Typical application
wiring”.
For device connection it is recommended to use a shielded cable with
external diameter 3.5 to 8 mm. Maximum cable length of the current loop is
1200 m, maximum voltage output cable length is 15 m. The cable must be
located at indoor rooms and should not be led in parallel along power cabling.
Safety distance is up to 0.5 m, otherwise undesirable induction of
interference signals can appear. For TxxxxL devices connection it is
recommended to use cable with respect to the female connector
specification. Do not connect shielding at connector side
Warning
•Installation, commissioning and maintenance may only be carried out by
personnel with qualification by applicable regulations and standards.
•Don´t connect transmitter while power supply voltage is on.
IE-SNC-T51(2)XX-05 7
Modification of device adjustment
Device adjustment is performed by means of the optional SP003
communication cable, connected to USB port of the PC. It is necessary to
have installed configuration program Tsensor on the PC (program is free to
download at www.cometsystem.com). During installation please take care
about installation of driver for USB communication.
•unscrew four screws of the device lid and remove the lid. If device is
already installed to measuring system, disconnect wires from terminals
•connect SP003 communication cable to the
PC. Installed USB driver detect connected
cable and create virtual COM port inside the
PC
•run installed Tsensor program and continue
in accordance with his instructions
•when new setting is saved and finished,
disconnect the cable from the device,
connect wires into its terminals and place the lid back to the device
8IE-SNC-T51(2)XX-05
Info mode
Several settings of installed transmitter are possible to verify without a use
of the computer. It is necessary to connect power supply. Unscrew
the transmitter lid and shortly press button (the right of the terminal) by
means of a tool (e.g. screwdriver). Upper line of the LCD display shows value
of CO2concentration corresponding to output current 4 mA (output
voltage 0 V)
T5140, T5145
T5240, T5245
T5141
T5241
Press button again to get value of CO2concentration corresponding to output
current 20 mA (output voltage 10 V).
T5140, T5145
T5240, T5245
T5141
T5241
Press 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 15 s, and then automatically
goes back to measuring cycle.
IE-SNC-T51(2)XX-05 9
Error states of the device
Device continuously checks its state during operation. In case error is found
LCD displays 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 incorrect writing procedure to device’s memory occurred
or if damage of calibration data appeared. At this state device does
not measure. It is a serious error, contact distributor of the device
to fix.
Error 2 - there is a reading „Err2“ on LCD display. The CO2 concentration
measurement error occurred.
Error 3 - there is a reading „Err3“ on LCD display upper line. Error of internal
A/D converter appeared (converter does not respond, probably
damage of A/D converter). This error does not affect CO2
concentration measurement. It is a serious error, contact
distributor of the device.
Error 4 - there is a reading „Err4“ on LCD display. It is internal device error
during initialization of CO2sensor. Under this condition device
does not measure concentration of CO2. Value read from device
is -9999. CO2sensor is probably damaged. It is a serious error,
contact distributor of the device.
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