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© 2018 All rights reserved. Data subject to change without notice.
LPT-P - Operation Manual
Rev. B | 2018.08
Ž
TP1 and TP2
Test Points 1 and 2 to confi rm voltage registers are
working. Reading should be 3.3 volts.
•
RS-485 Communication
Terminals
Pluggable power and signal terminal for connection
to controller and next transmitter.
•
Termination Resistor
Network termination resistor. “IN” position includes
120 ohm resistor.
5 INSTALLATION
The sensor in the LPT-P 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-P when it arrives the sensors will require about a 5
minute warm up period. If the device is not installed within two weeks of delivery, the sensors 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:
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.
NOTE:
Silicone, lead and chlorinated hydrocarbon vapours can poison catalytic sensors.
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,