61-101-00802.EF1 Revision J
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(3) Disconnect T/S IND connector from the Indicator.
(4) Reconnect aircraft wiring plug to Indicator.
(5) Return the aircraft to its original configuration.
5. SYSTEM WIRING INTEGRITY TEST
Note:
Refer to Precautions and Preliminary in General Information section.
Note:
Ensure that the Insulation, Capacitance, Indicator test and Preferred Calibration have
all been accomplished with satisfactory results and that the tanks are still dry prior to
attempting this test.
Note:
This test is used to determine whether there exists an inline (series) resistance
problem in the aircraft wiring. It will be accomplished by a comparison of the aircraft
empty probes capacitance versus a simulated capacitance from the T/S to drive
the cockpit indicator to the same point. No adjustment of the Indicator should be made
during this test or based on the outcome of this test. If repairs are made to the harness
following this test, then the Preferred Calibration must be repeated and subsequently
this integrity test.
A. Aircraft Preparation
(1) Disconnect aircraft battery.
CAUTION:
WHEN LOWERING OR RAISING THE FUEL PANEL, ENSURE
AIRCRAFT BATTERY IS DISCONNECTED.
(2) Gain access to applicable Indicator.
(3) Open the circuit breakers.
(4) Disconnect aircraft wiring plug at the indicator.
B. Test Set Preparation
(1)
Set the T/S ON / OFF switch to OFF.
(2)
Rotate the TEST FUNCTION switch to PROBE(S).
(3)
Set the INSULATION / SYSTEM switch to SYSTEM.
(4)
Set the MAIN / TOT-AUX / NAC switch to MAIN / TOT.
(5)
Set the 200 (pF) / 1000 (pF) switch to 200 (pF).
C. Connecting Test Set
(1)
Connect the T/S as shown in either Figure 3 or 4.
Note:
Figure 3 depicts using Adapter Cable 101-00831 for conversion to systems
with circular style connectors.
(2)
Connect the T/S ACFT connector to the aircraft-wiring plug removed from indicator.
(3)
Do not connect the T/S IND connector.
D. Test
(1)
Set the T/S ON / OFF switch to ON.
(2)
Set the aircraft fuel panel select switch to MAIN or TOTAL.
(3)
Push and hold the T/S PRESS TO READ CAP (pF) pushbutton.
