TB 9-6625-1866-50
(3) Turn NULL switch to 10, 1, .1, and .01 while adjusting P4 (fig. 1) for 0 (zero)
indication on UUT meter.
12. 0.5-Volt Range
a. Performance Check
(1) Turn VOLTS RANGE switch to .5.
(2) Adjust dc voltage standard (A2, table 1) for full-scale indication on UUT meter.
(3) Turn NULL switch to 10, 1, .1, and .01 while adjusting dc voltage standard for 0
(zero) indication on UUT meter. Dc voltage standard will indicate between 0.49975 and
0.50025 volt. If not, perform b below.
(4) Turn NULL switch to VTVM.
(5) Adjust dc voltage standard for 0 (zero) indication on UUT meter.
b. Adjustments
(1) Turn NULL switch to VTVM.
(2) Adjust dc voltage standard for 0.500000 volt.
(3) Turn NULL switch to 10, 1, .1 and .01 while adjusting P5 (fig. 1) for 0 (zero)
indication on UUT meter.
13. Voltage Dividers
a. Performance Check
(1) Turn VOLTS RANGE switch to CAL and press and hold CAL PUSH (OP-CAL,
to CAL) switch.
(2) Adjust CAL ADJ control for 0 (zero) indication on UUT meter.
(3) Release CAL PUSH (OP-CAL, to OP) switch.
(4) Turn VOLTS RANGE switch to 500 and A, B, C, D and E switches to 3, 9, 9, 9
and 10.
(5) Adjust dc voltage standard (A2, table 1) to 400 volts.
(6) Turn NULL switch to 10, 1, .1, and .01 while adjusting dc voltage standard for 0
(zero) indication on UUT meter for each NULL switch position. Dc voltage standard will
indicate between 399.800 and 400.200 volts.
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