© 2020 All rights reserved. Data subject to change without notice.
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Rev. B | 2020.11
LPT-M - Operation Manual
6.5 Set LCD Display Contrast Level
The contrast level of the LCD display can be changed to be made more visible in high light, low light
and/or diff erent temperatures that may require a diff erent contrast setting.
In the Har
dware Confi guration Menu (passcode 1001), press either ARROW to scroll through the
menu and select Contrast Adjust. Press ENTER to select. Use the ARROW keys to enter a number
between 00 and 35. The factory default contrast level is 20.
6.6 Fault Detection
The LPT-M has built in fault detection, and in the event of a problem with the measurement
circuitry the transmitter will indicate a fault condition on the display. Normal operation will resume
once the fault condition has been corrected.
NOTE
: While faults in the circuitry can be detected, a dead or damaged electrochemical sensor will
usually appear to the transmitter as a zero gas reading. To ensure safe operation, periodic bump
tests are required.
