TM 55-1520-240-23-7
8-80.5.1
TEST AND ADJUST FUEL QUANTITY INDICATOR USING PSD 60-1AF FUEL QUANTITY
TEST SET
(Continued)
8-80.5.1
5.
Connect fuel quantity tester CHASSIS jack (J-7)
to airfame ground between the Right Main and
Right Forward Aux fuel tanks.
6.
Lift to unlock tester power toggle switch (S-1)
and turn to ON (Figure 1).
7.
Allow a 3 minute warmup. If words "LO BAT"
appear in upper-left corner of LCD (Figure 2),
replace batteries.
8.
Connect PSDAF-106 "T" cable lead (Figure 10)
marked "MAIN & AUX HIZ" to TU HIZ terminal
(J-5) on tester (Figure 1).
9.
Connect PSDAF-106 "T" cable "MAIN LOZ" lead
to tester TU LOZ terminal (J-4) on tester (Figure
1).
10.
Rotate tester FUNCT switch (S-2) to MEAS EXT
(Figure 1).
11.
Rotate tester SELECT switch (S-3) to TU.
12.
Read cable LOZ-HIZ capacitance displayed
on LCD If capacitance exceeds .5 pf, repair or
replace interface cable. Record capacitance on
dial calibration worksheet line 1 (Figure 23.1).
13.
Subtract cable capacitance measured in step 12
above from 361.7 pf. Record result on worksheet
line 2.
14.
Disconnect interface cable MAIN & AUX HIZ and
MAIN LOZ leads from tester TU terminals.
15.
Connect cable MAIN & AUX HIZ lead to
INDICATOR HIZ terminal (J-2) on left side of
tester.
16.
Connect cable MAIN LOZ lead to tester
INDICATOR LOZ terminal (J-1).
17.
Connect cable MAIN CP lead to tester
INDICATOR COMP terminal (J-3).
18.
Disconnect cable 300W7 (19-pin connector)
from 057W2 at right MAIN tank access panel
114PS518.
19.
Connect interface cable (J-2) to connector
disconnected from tank access panel 114PS518.
DO NOT CONNECT (P-2) to 057W2 on tank.
20.
Rotate tester FUNCT switch (S-2) to MEASURE
INT.
21.
Select "034" on TU decade D-1 (Figure 3).
8-235
