Owner's manual

3.6 START UP
Upon completion of all mechanical mounting and termination of all field wiring, apply system power and observe
the following normal conditions:
a) The “Fault” LED is off.
b) A reading of 0.00% CO
2
should be indicated upon conclusion of a 12 second “warming up” cycle.
Note 1: If the display contrast needs adjustment, refer to section 3.10.
3.6.1 Initial Operational Tests
After a warm up period has been allowed for, the sensor should be checked to verify sensitivity to carbon dioxide
gas.
Material Requirements
* Detcon PN 6132 Threaded Calibration Adapter
* Span Gas 50% of full-scale range CO
2
in air at a controlled flow rate of 200 ml/min.
a) Attach the calibration adapter to the threaded sensor housing. Apply the test gas at a controlled flow rate of
200 ml/m. Observe that the LCD display increases to a level of 20% of full-scale range or higher.
b) Remove the test gas and observe that the LCD display decreases to “0.00 % CO2”
.
Initial operational tests are complete. Detcon CO2 sensors are pre-calibrated prior to shipment and will, in most
cases, not require significant adjustment on start up. However, it is recommended that a complete calibration test
and adjustment be performed within 24 hours of installation. Refer to calibration instructions in later text.
Detcon Model IR-540/IR-542 Carbon Dioxide Sensor PG.11
1234
RED BRN WHT BLK
Remote Transmitter
IR-540-RT
Remote Sensor
IR-540-RS
WHT
B
LK
YEL
BLU
RED
B
RN
56
YEL BLU
Figure #4