TM 1-1520-238-T-7
10–160.12
Change 5
10–48A.
FUEL QUANTITY SYSTEM – CAPACITANCE AND INDICATING TEST
10–48A
(USING PSD 60-1AF TEST SET) (cont)
Task
Result
v. Verify CPG selectable digital display (fig.
10–70.9) LEFT/FWD digital readout and
pilot fuel quantity indicator TOTAL digital
readout and FWD vertical scale indicate
1050 30.
If CPG selectable digital display LEFT/FWD digital
readout and pilot fuel quantity indicator TOTAL digital
readout and FWD vertical scale do not indicate 1050
30, adjust fuel signal conditioner TK1 F to obtain
1050 30 fuel indication.
w. Set test set (fig. 10–70.5) FUNCT switch to
AIRCRAFT ONLY.
x. Verify DC voltage reading on multimeter is 0
0.5 VDC.
If DC voltage reading on multimeter is not 0 0.5 VDC
adjust fuel signal conditioner TK1 E to obtain 0 0.5
VDC.
y. Remove multimeter leads from receptacles
on T cable (fig. 10–70.7).
z. On pilot center circuit breaker panel (fig.
10–70.4), open FUEL FILL circuit breaker.
aa. On pilot ELEC PWR panel (fig. 10–70.3),
set BATT/EXT PWR switch to OFF.
ab. Detach T cable #1/FWD LOZ and #1/FWD
HIZ lead from test set INDICATOR LOZ
and INDICATOR HIZ receptacle.
ac. Detach T cable P1 from (A308) fuel signal
conditioner J1.
6. Perform fuel quantity system aft tank indicating test as follows:
a. Attach #2/FWD LOZ lead to test set TU LOZ
receptacle.
b. Attach #2/FWD HIZ lead to test set TU HIZ
receptacle.
c. Set test set FUNCT switch to MEASURE
EXT.
d. On test set, rotate SELECT switch to
LOZ-HIZ.
