© 2020 All rights reserved. Data subject to change without notice.
53
Rev. B | 2020.11
LPT-M - Operation Manual
6.12 Enable / Disable Channels
This setting allows you to enable or disable the channel(s). If a channel with a viable sensor is
disabled, the gas readings gathered by that channel will not be used to control the relays and/or
alarms.
In the Sensor C
onfi guration Menu (passcode 3032), press either ARROW key to scroll through the
menu and select the channel you want to disable.
Press ENTER and use the ARROW key to scroll to the Enable screen. Use the ENTER key to choose ON
or OFF. Use the ARROW key to move on to the next menu item and ENTER to Exit.
7 CALIBRATION
7.1 Calibr
ation Specifi cations
7.1.1 Gas
Calibration span gases should have at least ± 5% accuracy and have a current date stamp.
Gas generators should have a current dated cell installed. Service personnel should fl ow zero
emissions air or 20.9% volume O
2
(scrubbed of hydrocarbons) before attempting to null adjust
toxic gas sensors. In some cases nitrogen (N
2
) can be substituted for zero air when null adjusting
electrochemical sensors. Contact CETCI for clarifi cation.
Every LPT-M transmitter is calibrated in a chamber by true diff usion method prior to leaving
our facility. This method more closely emulates actual “real world” conditions. Field calibration
