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© 2022 All rights reserved. Data subject to change without notice.
LPT-M - Operation Manual
Rev. B | 2022.03
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 different temperatures that may require a different
contrast setting.
In the Hardware Configuration 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.
