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© 2021 All rights reserved. Data subject to change without notice.
cGas Detector Analog Transmitter - Installation Manual
Rev. B | 2021.08
6 INSTALLATION
The sensor in the CGAS-A goes through a burn in period at our factory prior to
shipping so it is ready for operation upon arrival. If you install the CGAS-A when
it arrives, most sensors will not require a long warm up period (about 5 minutes
for Ammonia and Nitrogen dioxide, 2 minutes for the other gases, except
Oxygen which is a minimum of 2 hours).
If the device is not installed within two weeks of delivery, the sensor may
require a longer warm up time to stabilize (approximately 48 hours) and
provide accurate readings.
NOTE:
CETCI suggests that upon power-up, all sensors be left to warm up for
24 hours prior to considering the gas readings to be accurate.
NOTE:
All sensors are calibrated in the factory before they are shipped
and should not require calibration at the time of a routine installation or
replacement.
NOTE:
Temperature affects calibration. It is important to ensure the gas is
at the appropriate temperature during calibration. If the sensor is being used
in an extreme temperature range, calibration should be done in that same
temperature range.
A bump test will help you determine if a sensor requires calibration. If the
sensor still does not respond as it should after a successful calibration, it
probably requires replacing.
6.1 Special Considerations for Different Types of Sensors
After installing an CGAS-A with an Oxygen sensor, leave it to warm up for at
least 2 hours before looking at the readings. If after at least 2 hours, the gas
reading is not 20.9%, you should do a respan.
