© 2020 All rights reserved. Data subject to change without notice.
23
Rev. A | 2020.03
cGas Detector Digital Transmitter - Installation Manual
6 INSTALLATION
The sensor(s) in the cGas Detector go through a burn in period at our factory
prior to shipping so it is ready for operation upon arrival. When installing the
cGas Detect
or for the fi rst time, the sensor may require a long warm up time
(24 to 48 hours) to stabilize 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.
*except,
Ammonia, which should be left to warm up for 48 hours
.
NOTE:
All sensors are calibrated in the factory 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.
6.1 Special Considerations for Different Types of Sensors
If the cGas Detector is being installed in an environment that is different than
ambient room temperature, you may want to do a zero calibration. This will
allow for the device to compensate for the new environment in which it is being
installed.
After installing a cGas Detector with an Oxygen sensor, leave it to warm up for
at least 2 hours before looking at the readings. If after a minimum of 2 hours
the gas reading is not 20.9%, you should do a respan.
After a substantial warm up period, an Ethylene Oxide sensor should be zeroed
on site if the ambient temperature is above 22°C (71.6°F). This particular
sensor has a drift factor that can be as much as 1 ppm if the temperature rises
