J.P. Instruments EDM 760 Pilots Guide - Manual (Page 53)

Setting GPS-C Fuel Flow Communications Format
GPS-C Input to GPS; output of EDM-760
0 No fuel data output
1 Garmin (Shadin Miniflow format)
2 Allied Signal (format B)
3 Arnav/EI fuel data
4 Allied Signal (format C) *
5
(not assigned)
6 UPS/Garmin fuel/air data
Diagnostic Messages, Fuel Flow
The following displays indicate a malfunction in the Fuel Flow
Option transducer or associated electrical connections:
0.0
GPH Zero’s indicate Fuel flow is too low to register
--- GPH Dashes indicate No fuel flow transducer signals
--- H.M Dashes indicate No fuel flow transducer signals
GPS Interface Diagnostics
Measurements REQ, RES, &
MPG are all missing from the
scan.
No communications from GPS receiver
to EDM-760. Possibly no connection or
aircraft GPS is off.
NO - COM message and
measurements
REQ, RES, &
MPG are missing.
Communications are received by EDM-
760 and the Auto-Protocol setup is in
process. Verify correct output format
setup in GPS receiver; check GPS
connections.
NO - SIG message and
measurements
REQ, RES, &
MPG are missing.
GPS receiver has insufficient signal for
valid data.
NO - WPT message and
measurements
REQ & RES, are
missing.
No waypoints are programmed into the
aircraft GPS receiver.
- - - REQ or - - - RES message Your ground track is more than ± 70°
from your course to the next GPS
waypoint.
For Your Safe Flight Page 49