TB 9-6625-975-24
meter does not indicate 0.045 inches on both ends of the scale as noted in a (2) above
perform b (1) through (3) below.
(4) Reconnect resistance standard to TI and set resistance standard for 50 M .
(5) Set TI RANGE switch to 100 V M . Rotate generator crank cw at normal
speed. TI meter will indicate 50 M 0.045 inches. Note TI meter indication.
(6) Remove resistance standard from TI. Short TI HI and LO terminals together.
Rotate generator crank cw at normal speed. TI meter will indicate 0 0.045 inches. If TI
meter does not indicate 0.045 inches on both ends of the scale as indicated in (5) above,
perform b (4) through (6) below.
(7) Connect equipment as shown in (fig. 2) and substitute resistance standards as
required for settings and indications listed in table 5. Resistance standard will indicate
within limits specified.
Table 5. Resistance Accuracy
Resistance standard indications1
Test Instrument
RANGE switch
settings
Indications
Min
Max
8
12
M x1
10 M
M
M
19
21
M x1
20 M
M
M
28
32
M x1
30 M
M
M
45
55
M x1
50 M
M
M
38
42
M x2
40 M
M
M
9.5
10.5
M
2
10 M
M
M
11 M
9
10
M
5
1
M
M
1
950
1050
k
Substitute resistance standards as required for M
indications.
b. Adjustments
(1) With TI HI and LO terminals shorted rotate generator crank cw at normal
speed and adjust R2 (fig. 3) for 0 0.045 inches.
(2) Remove short and reconnect resistance standard, rotate generator crank cw at
normal speed and adjust R2 (fig. 3) for 50 M 0.045 inches.
(3) Repeat (1) and (2) above and adjust R2 (fig. 3) for best compromise or until no
further adjustments are required.
(4) With TI HI and LO terminals shorted rotate generator crank cw at normal
speed and adjust R1 (fig. 3) for 0 0.045 inches.
(5) Remove short and reconnect resistance standard, rotate generator crank cw at
normal speed and adjust R1 (fig. 3) for 50 M 0.045 inches.
(6) Repeat (4) and (5) above and adjust R1 (fig. 3) for best compromise or no further
adjustments are required.
17. Final Procedure
a. Deenergize and disconnect all equipment and reinstall protective cover on TI.
b. Annotate and affix DA Label/Form in accordance with TB 750- 25.
