TB 9-6625-1866-50
c. Position UUT controls as listed in (1) through (4) below:
(1) RANGE switch to 5.
(2) NULL switch to .01.
(3) Polarity switch to + (positive).
(4) Voltage readout dials (A through E) to zero.
f. Set UUT power switch to on and allow at least 20 minutes for equipment to warm-
up and stabilize.
until UUT meter indicates zero.
NOTE
When the UUT is not within tolerance, perform the specified
adjustment and continue the performance check. When the
UUT is not within tolerance and no adjustment is specified, the
deficiency must be corrected before continuing with the
procedure.
WARNING
HIGH VOLTAGE is used during the performance of this
procedure. DEATH ON CONTACT may result if personnel fail
to observe safety precautions.
17. Dc VTVM and Null Range
a. Performance Check
(1) Turn UUT NULL switch to VTVM and RANGE switch to .5.
(2) Connect dc voltage standard (A2, table 6) output to UUT input terminal, using
cable (B1, table 7).
(3) Adjust dc voltage standard output until UUT meter indicates 500. Dc voltage
standard will indicate between 0.485 and 0.515 volt. If not, perform b below.
(4) Turn UUT RANGE switch to settings listed in table 8 and repeat technique of
(3) above. Voltage standard will indicate within limits specified.
13
