TB 9-6625-142-24
b. Adjustments. No adjustments can be made.
11. AC Current
a. Performance Check
Connect TI mA input and COM to calibrator.
(1)
and 200 A range.
(2)
Set TI function switch to
(3) Set calibrator output for 180 A @ 45 Hz.
TI will indicate within limits
specified for the 200 μA @ 45 Hz range in table 6.
(4) Repeat step (3) above for 500 Hz. TI will indicate within limits specified for the
200 μA range @ 500 Hz range in table 6.
(5) Repeat technique of (3) and (4) above for the 2 mA through 200 mA ranges @
45 Hz and 500 Hz. TI will indicate within limits specified for those ranges in table 6.
(6) Set calibrator output to minimum. Connect TI 10A and COM to the calibrator
amplifier CURRENT OUTPUT terminals, observing polarity.
(7) Set calibrator output to 9 A @ 45 Hz. TI will indicate within limits specified for
the 10 A range @ 45 Hz in table 6.
(8)
Repeat step (7) above for 500 Hz.
(9)
Set calibrator output to minimum.
Table 6. AC Current Accuracy.
Test Instrument
Limits
Calibrator Output
RANGE
(AC Amps)
(AC Amps)
(AC Amps)
Min
Max
180 @ 45 Hz
200
176.0
184.0
180 @ 500 Hz
200
176.0
184.0
1.8 m @ 45 Hz
2m
1.760 m
1.840 m
1.8 m @ 500 Hz
2m
1.760 m
1.840 m
18 m @ 45 Hz
20 m
17.60 m
18.40 m
18 m @ 500 Hz
20 m
17.60 m
18.40 m
180 m @ 45 Hz
200 m
176.0 m
184.0 m
180 m @ 500 Hz
200 m
176.0 m
184.0 m
1,2
9 @ 45 Hz
10
8.73
9.27
10 1,2
9 @ 500 Hz
8.73
9.27
Move test lead from TI mA terminal to TI 10A terminal.
1
Connect TI to the calibrator amplifier CURRENT OUTPUT terminals, observing polarity.
2
b. Adjustments. No adjustments can be made.