TB 9-6625-2114-24
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 set within the performance
check where applicable.
NOTE
The FUNCTION and SELECTOR switches are functionally
identical and will be referred to as the SELECTOR switch
throughout this section.
a. Remove protective cover from TI only when necessary to make adjustments. Replace
cover after completing the adjustments.
b. Connect TI to a 115 V ac source.
c. Set SELECTOR switch to - and RANGE switch to RX1 1V. Allow at least 15
minutes for warm-up.
d. Set SELECTOR switch to OFF and wait 30 seconds. If meter pointer does not
indicate 0, adjust meter mechanical zero for a 0 indication.
8. Dc Voltage
a. Performance Check
(1) Set SELECTOR switch to +.
(2) Connect DC probe and COMMON lead together and adjust ZERO ADJ for 0
meter indication.
(3) Connect DC probe and COMMON lead to calibrator OUTPUT HI and LO.
(4) Adjust calibrator for a full scale indication on TI. If calibrator does not indicate
between 0.970 and 1.030 V, perform b below.
(5) Repeat technique of (4) above using settings and indications listed in table 3.
Calibrator will indicate within limits specified.
Table 3. Dc Voltage and Tracking
Calibrator indications
Test instrument
(V dc)
RANGE
switch settings
Indications
Min
Max
RX1 1V
0.6
0.570
0.630
RX10 3V
3.0
2.910
3.090
1.0 1
RX100 10V
9.70
10.30
RX1K 30V
3.0
29.10
30.90
RX100K 300V
3.0
291.0
309.0
See footnote at end of table.
