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© 2020 All rights reserved. Data subject to change without notice.
LPT-M - Operation Manual
Rev. B | 2020.11
5 INSTALLATION
The sensor in the LPT-M goes through a burn in period at our factory prior to shipiping so it is ready
for operation upon arrival. If you install the LPT-M 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 and do not require calibration at the time
of a routine installation.
NOTE:
Temperature aff ects 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.
5.1 Special Consider
ations for Diff erent Types of
Sensors
After installing an LPT-M 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 by following Step 1 in Section
7.5 Calibrating an Oxygen Sensor
.
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 to 25°C (77°F). With the low set point you could experience
false alarms.