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TM 55-4920-383-13&P
b. Disconnect Test Set power cable.
c. Disconnect Test Set accessory cables and test lead ground cable.
2-5.
Test Set Functions.
The Test Set contains four basic types of circuitry.
function and is described in the following paragraphs.
Each circuit performs a separate
(See fig. 2-1.)
a. Measuring tank unit and compensator
b. Measuring tank unit and compensator
c. Simulating tank unit and compensator
the aircraft indicator under test.
capacitance.
insulation resistance.
capacitance for checking
d.
Checking the Test Set capacitance measurement and resistance measurement
circuitry.
2-6.
Typical Interconnection.
which are listed in table 1-2. To interconnect the Test Set to the fuel quantity installation
proceed as follows:
Figure 2-2 shows a typical system/Test Set interconnection. The specific inter-
connection is dependent on the type of aircraft and type of fuel quantity system. For more
detailed information about a particular aircraft’s fuel quantity system, reference should be
made to the aircraft’s applicable technical manual. Table 1-2 lists the accessory cables
provided with the Test Set, to be used as required to connect the Test Set to the particular
aircraft unit or system to be tested. The description which follows pertains to the typical
system/Test Set interconnection shown in figure 2-2 and utilizing the cables as required
a.
If necessary to gain access to the indicator connectors, remove the aircraft fuel
quantity system indicator from the instrument panel. Disconnect the cable from the
receptacle at the rear of the indicator.
See applicable aircraft manual for removal of
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