TB 9-6625-2184-35
HIGH VOLTAGE is used or exposed during the performance of
DEATH ON CONTACT may result if
personnel fail to observe safety precautions.
REDUCE
OUTPUT(S) to minimum after each step within the
performance checks where applicable.
a. Remove protective covers from TI only when necessary to make adjustments.
Replace cover after completing adjustments.
c. Connect autotransformer to a
115 V ac
power source and adjust for a
115 V ac
output.
d. Set power switch to ON and allow at least 1 hour for warm-up and stabilization.
a. Performance Check
(1) Connect true rms voltmeter to BAL OUTPUT using voltage divider.
NOTE
Reduce output promptly after making checks to avoid
overheating voltage divider.
(2) Position controls as listed in (a) through (c) below:
(a) MOD. BAL. - BAL. - UNBAL switch to BAL.
(b) RANGE switch to X100.
(3) Adjust AMPLITUDE COARSE and FINE controls until OUTPUT LEVEL
meter indicates 40 on the 0 to 50 scale. If true rms voltmeter does not indicate between
37.5 and 42.5 V ac, perform b below.
(4) Repeat technique of (3) above for remaining OUTPUT LEVEL meter indications
listed in table 3. True rms voltmeter will indicate within limits specified.
True rms voltmeter indications
Test instrument OUTPUT LEVEL
(Vac)
meter indications
(V ac)
Min
Max
30
27.5
32.5
20
17.5
22.5
10
7.5
12.5