61-101-00802.EF1 Revision J Page | 17
(4) Record the capacitance value measured.
(5) Release the pushbutton.
(6) Rotate the TEST FUNCTION switch to CAP SIM CAL (NORM SYS).
(7) Set the CAP SIM (pF) 100’s and the 10’s thumbwheels to the closest approximation
of the recorded value of step 4.
(8) Press and hold the PRESS TO READ CAP (pF) pushbutton while adjusting the CAP
SIM (pF) control knob to obtain the recorded value of step 4.
(9) Set the T/S ON / OFF switch to OFF.
(10) Connect the T/S to the Indicator as shown in either Figure 5 or 6. Figure 5 depicts
using Adapter Cable 101-00831 for conversion to systems with circular style
connectors.
(11) Connect the aircraft battery if not already connected.
(12) Close the circuit breakers.
(13) Turn the aircraft battery ON / OFF switch ON.
(14) Set the T/S ON / OFF switch to ON.
CAUTION: DO NOT TAP BEZEL OF INSTRUMENT TO VIBRATE. TO REMOVE
FRICTION, GENTLY TAP ADJACENT PANEL OR REAR HOUSING OF
INDICATOR BEFORE TAKING READINGS.
(15) Verify the indicator reads slightly below zero (approximately one needle width).
(16) Rotate the TEST FUNCTION switch to IND AMP.
CAUTION: DO NOT TAP BEZEL OF INSTRUMENT TO VIBRATE. TO REMOVE
FRICTION, GENTLY TAP ADJACENT PANEL OR REAR HOUSING OF
INDICATOR BEFORE TAKING READINGS.
(17) Verify the indicator reads the same as in step 15 within one needle width.
(18) Failure to obtain the correct indication may indicate the possibility of in-line
resistance in the aircraft wiring between the Indicator and the probes.
a. If this condition exists, disconnect and clean the wing break connector and the
wet wing connector with the contact cleaner. Then, gently blow dry.
Note: Model 90 and 99 series have no wet wing.
b. If the condition persists, disconnect and clean the fuel panel connector located
behind the LH sidewall and below the fuel panel with the contact cleaner,
gently blowing dry.
Note: Do NOT spray contact cleaner on the individual Matrix type connectors.
c. If cleaning the connectors does not yield satisfactory results, it may become
necessary to de-pin and inspect each Matrix type connector. Replace any
matrix type blocks that are suspect.
Note: When cleaning the connectors be sure to include the T/S’s
connectors.
(19) Rotate the TEST FUNCTION switch to CAP SIM CAL (NORM SYS).
(20) Set the CAP SIM (pF) 100’s and the 10’s thumbwheels to the closest approximation
of the required value as per Table 4.
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