FAA Approved Installation Manual for the EDM-960 system
Report No 909
Primary Engine Data Management System
Page 4 of 45 Rev C
Date 12-12-12
5. Operation and Abbreviations
The EDM-960 is a combined electronic indicating system which simultaneously displays to the pilot powerplant and
aircraft systems operating parameters. It includes the following indicating systems; replacing all previous primary
digital and/or analog instruments: Message Area Abbreviation in parenthesis. (X)* denotes cylinder No.
5.1 Remote Alarm Display Operation
The RAD is composed of two (one per engine) red 0.2” high by 8 character displays. The RAD displays flashing
alert messages when any of the parameters reaches its preset trigger point, otherwise the RAD is dark. The RAD
also serves as an alert back-up if the main LCD display screen becomes inoperative. Some alarm examples are;
CHT over-temp: ‘HIGH-CHT’, oil over-temp: ‘OIL-TEMP’, RPM over-speed: ‘HIGH-RPM’. The RAD will extinguish
when no primary alarms exist or when the pilot acknowledges the alarm by tapping the STEP button on the EDM-
960. On initial startup or whenever power is turned on, the words ‘EDM-960 PRIMARY’ are displayed, followed by
the make and model of the aircraft for which the primary limits are set.
Gauge Function
Message Area
Alarm Abbreviation
Primary
Primary
Engine rotational speed
RPM xxxx
Engine Manifold Pressure
MAP xx.x in hg
Engine Cylinder Head Temp
CHT2 xxx
o
F
Engine Oil Temperature
O-T xxx
o
F
Engine Oil Pressure
O-P xxx
o
F
Fuel Pressure
F-P xx PSI
Fuel Flow to engine
F-F xx.x GPH
Comp. Discharge Temp.
CDT xxx
o
F
Turbine inlet Temp. Left side
TIT-L xxxx
o
F
Turbine Inlet Temp. Right side
TIT-R xxxx
o
F
Single Turbine Inlet Temp.
TIT xxxx
o
F
Non-Primary
Non-Primary
Exhaust Gas Temp.
EGT2 xxxx
o
F
Shock Cooling of CHT
CLD xx
o
/MIN
Differential Temp. of EGT
DIF xx
o
F
Bus Voltage
Volts xx.x
Amperage Load
AMPS xx
Outside Air Temp.
OAT xx
o
F
Estimated Time to Empty
Est. T to E xx:xx H:M
Fuel used to date
USED xx.x GAL
Estimated Remaining fuel
Est. REM xx GAL
Estimated Fuel required to Waypoint
Est. WP REQ xx GAL
Estimated Fuel Remaining at Waypoint
Est. WP RES xx GAL
Nautical Miles per Gallon
ECON xx.x MPG
Brightness, Dim control
DIM/BRT
