FAA Approved Installation Manual for the Report No 908
EDM-900 and EDM-930 Page 16 of 55 Rev I
Primary Engine Data Management System Date 1-18-2013
observing polarity to pin 1 and 2 on 790200. 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.
21. Oil Pressure Sensor Installation
Use the J3 connector harness 790420 labeled OIL-P for a VDO pressure sensor PN 306018 (0-150 psi) (shown in
diagram below). Use pin 4 for a Sensym pressure sensor (not shown) or three wire i2s sensor (0-5vdc)
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. Connect the other end of the hose to the engine manufacturer’s recommended location for engine oil
pressure.
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