SECTION VI
PMS II GROUND FAULT TESTING
Conditions Which Must Be Met
1.
There should be Infinite resistance between the Main Unit ground and the hull, and the Main Unit Ground and
24v common.
2.
No solid voltage should exist between Main Unit ground and the hull.
Testing Procedures
1. Measure resistance with system power turned off at the battery fused switch.
2.
Measure voltages with system operating.
3.
To Isolate Sensor ground faults to specific modules, disconnect the ribbon cables connected to the Input PC Board
one at a time. Use a rate module GND terminal or a switch module ground (- OR GND) terminal (all switch -(NEG)
Inputs are system ground) for this test. Ensure that the module (rate or switch) you are using for the ground terminal
Is plugged Into the Input PC board.
Section 6 - Page 1
