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  TM 11-6130-266-15
6-5. Regulation and Ripple Test
a. Test Equipment and Materials.
(1) Digital, Voltmeter AN/GSM-64.
(2) Transformer, Variable TF-171A.
(3) Voltmeter, Meter ME-30A/U.
(4) Multimeter TS-352B/U.
(5) Multimeter, Weston Instruments Model 281 (test ammeter).
(6) Simulator, Battery Variable Load Bank (FMC63743, type K48149).
(7) Connector, Electrical (FSN 5935-921-3398).
b. Test Connections and Conditions . To perform this test, connect the equipment as shown in figure 6-1.
c. Procedure.
Control Settings
Step No.
Test procedure
Performance standard
Test equipment
Equipment under test
1
a. TF-171A set for
a. 230V-115V switch to
With no load connected, adjust DC OUTPUT
a. AN/GSM-64 indicates 28 volts dc.
115 volt ac, 60
115V.
ADJ potentiometer for 28 volts de indication on
Hz.
OUTPUT METER
b. AN/GSM-64 set
b. AC circuit breaker to
b . ME-30A/U indicates 140 millivolts maximum.
to indicate 28
ON.
volts de.
c. ME-30A/U set
c. DC circuit breaker to
to indicate 140
ON.
millivolts
d. Load bank not
connected.
2
Same as step No. 1,
Same as step No. 1.
a. AN/GSM-64 indicates 28 volts dc ±1%.
except TF-171A
b . ME-30A/U indicates 140 millivolts maximum.
set for 103.5 volts
ac, 60 Hz.
3
Same as step No. 1,
Same as step No. 1.
a. AN/GSM-64 indicates 28V dc ± 1%.
except TF-171A
b . ME-30A/U indicates 140 millivolts maximum.
set for 126 volts
ac, 60 Hz.
4
Same as step No. 1,
Same as step No. 1.
Adjust load bank for 25 amperes indication on
a.
AN/GSM-64 indicates 28 volts dc ±1.
except load bank
OUTPUT METER.
b.
ME-30A/U indicates 140 millivolts maximum.
is connected.
c.
Test ammeter indicates 25 amperes ±3%.
5
Same as step No. 4
Same as step No. 4.
Same as step No. 4.
a.
AN/GSM-64 indicates 28 volts de ±1%.
except TF-171A
b.
ME-30A/U indicates 140 millivolts maximum.
is set for 103.5
c.
Test ammeter indicates 25 amperes ±3%.
volts ac, 60 Hz.
6
Same as step No. 5,
Same as step No. 5.
Same as step No. 5.
a. AN/GSM-64 indicates 28 volts dc ±1%.
except TF-171A
b . ME-30A/U indicates 140 millivolts maximum.
is set for 126 volts
c. Test ammeter indicates 25 amperes ±3%.
ac 60 Hz.
6-4
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