TB 9-6625-2263-24
d. When indications specified in paragraphs 8 through 10 are not within tolerance,
perform the power supply check prior to making adjustments. After adjustments are made,
repeat paragraphs 8 through 10. Do not perform power supply check if all other
parameters are within tolerance.
e. Unless otherwise specified, all controls are control settings refer to the TI.
7. Equipment Setup
WARNING
HIGH VOLTAGE is used or exposed during the performance of
this calibration.
DEATH ON CONTACT may result if
personnel fail to observe safety precautions.
REDUCE
OUTPUT(S) to minimum after each step within the
performance check where available.
a. Remove protective covers from TI only when necessary to make adjustments.
Replace cover after completing the adjustments.
b. Connect TI to a 115 V ac source.
c. Release INPUT REAR/FRONT pushbutton to FRONT, and EXTERNAL
GUARD/NORMAL pushbutton to NORMAL.
d. Press POWER ON/OFF pushbutton to ON and allow at least 2 hours for warm-up.
8. Dc Voltage
a. Performance Check
(1) Press VDC pushbutton and RANGE
or
pushbutton to select 100 mV dc range.
(2) Short TI V/ INPUT HI and LO. If TI does not indicate between 0.010 and
+0.010 mVdc, perform b (1) through (4) below.
(3) Remove short and connect calibrator OUTPUT HI and LO to TI V/
INPUT
HI and LO.
(4) Set calibrator for a 100 mV dc output. If TI does not indicate between 99.979
and 100.021 mV dc, perform b (5) below.
(5) Repeat technique of (1) and (4) above for TI and calibrator settings listed in
Table 3. Dc Voltage
Test instrument
Test instrument
Calibrator
Indications
range settings
output settings
VDC
(VDC)
(V)
Adjustments1
Min
Max
b(6)
through b(8)
1
1
0.99987
1.00013
b(9)
through b(20)
10
1
0.9998
1.0002
b(9)
through b(20)
10
2
1.9997
2.0003
