56-101-01501_01502 Revision D
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B. The Insulation and Capacitance Self-Tests are performed during the first and second
initialization routines respectively.
C. The test frequency defaults to the last frequency entered.
Note:
The MAIN MENU screen provides the next Calibration due date.
6. MENU DISPLAYS
APPENDIX A: DISPLAY NAVIGATION GUIDE
Note:
To perform the tests, the Test Set must be connected to an Adapter Cable, and the latter
to the Aircraft. The Adapter Cable is specific to the Aircraft to be tested. Instructions
presented in this manual are general by necessity, and the particular testing procedures
are indicated in the information provided with each Adapter Cable, prepared as
supplements to this manual. Contact Barfield, Inc., for a current list of Adapter Cables
developed for this Test Set.
7. AIRCRAFT INSULATION TEST
A.
Aircraft Preparation
CAUTION:
TANK UNIT INSULATION TESTS ARE NOT TO BE CARRIED OUT UNTIL
FUEL TANKS HAVE BEEN EMPTIED AND PURGED. REFER TO SPECIFIC
AIRCRAFT MAINTENANCE MANUALS FOR PROPER FUELING AND
DEFUELING PROCEDURES OBSERVING PRECAUTIONS THEREIN.
(1) Defuel the Aircraft.
CAUTION:
FUEL QUANTITY, REFUEL, AND DEFUEL POWER MUST BE OFF
WHILE ACCESSING AND BEFORE ANY HARNESS, CABLE, OR
CONNECTOR IS REMOVED. POWER MUST REMAIN OFF UNTIL
CONNECTIONS ARE MADE AS SPECIFIED AND UNTIL POWER
REQUIREMENT IS CALLED OUT.
(2) Open appropriate Fuel Quantity System circuit breaker(s).
CAUTION:
REFER TO AIRCRAFT MAINTENANCE MANUAL FOR ACCESSING
PROCEDURES, FOLLOW ALL PRECAUTIONS THEREIN.
(3) Gain access to the cockpit indicator or the appropriate Fuel Quantity System electrical
connector(s) necessary for this procedure.
(4) Disconnect at the cockpit indicator or the appropriate electrical connector(s).
(5) It may be necessary to position an aircraft tank select switch and/or an Adapter Cable
select switch for this procedure.
B.
Connecting Test Set
(1) Position the equipment conveniently for the following procedures.
(2) Connect to the Test Set the Adapter Cable specific for the Aircraft being tested, as
shown in Figure 15 or as directed in the Adapter Cable Instructions.
(3) Connect the Adapter Cable between the Indicator and the aircraft wiring plug.
(4) Connect the ground lead from the adapter (if so equipped) or from the Test Set
GND
receptacle, to a secure airframe ground.