J.P. Instruments EDM 900 Pilots Guide - Manual (Page 21)

For Your Safe Flight Page 21
See ‘Section 9 - First Time Setup and Customization’.
Note: Amps can operate either as a (Amps Charge) charge/discharge or
(Amps Load) load meter, depending on programming.
Remote Annunciate Light
The remote auxiliary ‘ALERT LIGHT’ provides redundancy. Upon power
up the Remote Annunciate Light displays Red and Yellow. If the RAL is
not working abort the flight. While the EDM’s programmed configuration
(aircraft make and model and primary status) is shown in the display.
Mentally Confirm that it matches your aircraft configuration before using
the instrument. If it does not match the aircraft configuration abort the
flight.
Additional Displays Hobbs, Revisions, and Alarm Limits
Holding both the LF and DIM buttons simultaneously will display the
Hobbs times similar to the example below:
or Revisions