TB 9-6625-2023-24
Table 3. Dc voltage
Test instrument settings
Calibrator output
Test instrument indications
settings (dc)
RANGE
HIGH RESOLN
Min
Max
0.1
off
100
mV
0.099985
0.100015
1
off
1
V
0.99990
1.00010
1
on
1
V
0.999905
1.000095
1
on
-1
V
-0.999905
-1.000095
10
on
10
V
9.99917
10.00083
10
on
-10
V
-9.99917
-10.00083
10
off
10
V
9.9991
10.0009
100
off
100
V
99.989
100.011
100
on
100
V
99.9897
100.0103
1
k
on
1000
V
999.897
1000.103
1
k
off
1000
V
999.89
1000.11
(4) Press calibrator RESET key.
b. Adjustments
(1) Set calibrator to STANDBY and disconnect from TI.
(2) Remove TI top outer cover and top inner cover to gain access to circuit board A10.
(3) Set controls as listed in (a) through (e) below:
RANGE 10 key to on.
(a)
HIGH RESOLN key to on.
(b)
TRIGGER INTERNAL key to on.
(c)
MATH OFF key to on.
(d)
AUTO CAL key to off.
(e)
(4) Connect multimeter (V dc mode) INPUT LO to TI INPUT (2 WIRE) LO
(inguard chassis) and multimeter INPUT HI to A10 TP1 (fig. 1).
(5) Adjust A10 R66 (fig. 1) until multimeter indicates 0 V dc 50 PV.
(6) Disconnect multimeter.
(7) Press RANGE 100 and AUTO CAL keys to on.
(8) If TI does not indicate 0.0000 V 1 count, repeat (3) through (7) above.
(9) Replace TI protective covers.
(10) Press RANGE 1 key to on.
(11) Short INPUT (2 WIRE) HI and LO using copper wire or shorting bar.
(12) Allow TI to operate at room temperature for at least 30 minutes.
(13) TI will indicate 0.000000 V 4 counts.
(14) Remove short from INPUT (2 WIRE) HI and LO.
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