J.P. Instruments EDM 960 Twin Primary Installation Manual - Manual (Page 15)

FAA Approved Installation Manual for the EDM-960 system Report No 909
Primary Engine Data Management System Page 15 of 46 Rev D
Date 2-6-2014
21. Outside Air Temperature (OAT) Probe Installation
Connect the OAT probe to the
LEFT ENGINE DAU J1 connector
harness 790200 labeled OAT. All
wiring must be type K
thermocouple wire. Do not splice
ordinary copper wire in any
temperature probe circuits.
Install the OAT probe, PN 400510
in the airframe manufacturer’s recommended location. If this information is not available, place the OAT probe in clean
airflow such as in a cabin air scoop or below the underside of the wing away from engine heat or exhaust. In this case
it is recommended that the installation be done similar to the antenna installation. The outside aluminum shield tube is
used to both hold the probe in place and shield it from radiated heat from the sun it can be replaced with a 5/16 nut.
The OAT option is typically displayed as digital gauge and has no associated alarms.
22. Compressor Discharge Temp Probe Installation (optional)
Use the J1 connector harness 790200 and insert the yellow wire into the connector pin 3 and the red wire into pin 4. All
wiring must be type K thermocouple wire. The Induction Air Temperature probe, (IAT), is installed just after the
inter-cooler and the Compressor Discharge Temperature (CDT) just before the inter-cooler. The probe is the same as
an EGT probe and installed similarly to an EGT probe. A large clamp is supplied to fit around the air duct leaving the
inter-cooler. Alternately a 1/8 NPT fitting is available. IAT option is displayed as an independent digital temperature like
"125 IAT". On non-turbo engines the IAT in reality is the Carburetor temperature and displayed as “34 CRB.”
23. Carburetor Probe Installation (optional)
Use the J1 connector harness 790200 and insert the yellow wire into the connector pin 5 and the red wire into pin 6. All
wiring must be type K thermocouple wire. Do not splice ordinary copper wire in any temperature probe circuits. Locate
the access hole (1/4-24 thread) in the carburetor near the butterfly valve. Remove the screw plug now in that hole and
screw the CRB probe into the carburetor throat. No drilling or machining of the carburetor is necessary.
24. Oil Temperature Probe Installation
The sensor port is a standard 5/8-18 thread for both the Continental and Lycoming engines. Probe PN 400509 is a
complete assembly using type K thermocouple wire (red/yellow). Connect the wire marked oil temperature observing
polarity. Wire length has no effect on the readings. Oil temperature will be displayed as an independent temperature
digital and bar-graph. Check with engine manufactures proper location for oil temperature. Check for oil leaks before
first flight.
Oil Temp PN 400509
5/8-18 Thd
25. Oil Pressure Sensor Installation
Use the J3 connector harness 790422 labeled OIL-P
Oil pressure sensor mount using an aluminum clamp MS21919. Mount to firewall.
Mount the pressure sensor to the pressure line using a flexible hose and fittings (not supplied) as depicted in the
drawing below. Use aluminum clamp to mount the pressure sensor to firewall. Do not mount the sensor directly to the
engine
washer
aircraft sheet metal
washer
probe
shield tube
used to secure
probe