TM 55-1520-240-23-6
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TEST UTILITY RESERVOIR/COOLER (AVIM)
(Continued)
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FLUID LEVEL TRANSDUCER ADJUSTMENT
26.
Close valve (14).
27.
Apply pressure to pressure port (4) until cylinder
(15) bottoms in reservoir (11).
28.
Mark line on cylinder (15) where cylinder enters
housing (16). Use marking pencil (E271).
29.
Open valve (14).
30.
Close valve (10).
31.
Open valve (9) and fill reservoir (11) until line
on cylinder (15) is 1 inch from empty position.
Close valve.
32.
Connect signal generator (17) to transducer
receptacle (18). Pin numbers 1 and 2.
33.
Connect voltmeter (19) to transducer receptacle
(18). Pin numbers 3 and 4.
34.
Apply 5 volts at 450 Hz to transducer receptacle
(18). Then adjust the voltage until the
milliammeter reads 10 ma.
35.
Open valve (9) and apply 60 psi pressure to
return port (2) until line on cylinder (15) is 4
inches from housing (16).
36.
Close valve (9).
37.
Check reservoir (11) fluid level. Fluid level shall
not change.
38.
Remove two screws (20) from cylinder (15).
39.
Turn square end of LVDT core (21) until voltmeter
(19) reads 1.473 volts rms.
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