TB 9-4931-383-50
(3) If voltmeter does not indicate between 6.01999 and 6.02001 volts dc, perform b
below.
b. Adjustments.
Adjust R9, MASTER REF ADJUST
(fig. 5)
for an
indication of
a. Performance Check
NOTE
Do not perform power supply check if all other parameters are
within tolerance.
(1) Connect equipment as shown in figure 1, except connect TI from MASTER REF
(2) Set voltage divider (A7) to .0666667.
(3) Set dc transfer standard (A2) for 1 V mean output.
(4) Position TI controls as listed in (a) through (g) below:
(a) METER switch to VOLTAGE.
(b) VOLTAGE RANGE switch to 1000.
(c) Voltage dials to 00X.0000.
(d) VOLTAGE TRIP switch to 1000.
(e) VERNIER control fully clockwise.
(f) CURRENT LIMIT control fully clockwise.
(g) POWER switch to OPR.
(5) If null detector (A4) does not indicate null, perform b below.
b. Adjustments.
Adjust R9 REF VOLTAGE ADJUST
(fig. 6)
for a null
indication on
null detector (R).
25. Final Procedure
a. Deenergize and disconnect all equipment.
b. In accordance with TM 38-750, annotate and affix DA Label 80 (US Army
Calibration System). When TI cannot be adjusted within tolerance, annotate and affix DA
Form 2417 Unserviceable or Limited Use) tag.
34