TB 9-6625-162-24
(4) Set Ammeter Calibrator output for 0.4 A at 60 Hz. If TI does not indicate within
limits specified in appropriate row of table 8, perform b below.
(5) Repeat technique of (4) above, using settings and indications listed in table 8. If
TI does not indicate within limits specified in table 8, perform b below.
Table 7. AC Current Accuracy.
Test instrument
Ammeter
Coil Output
1
Range (A ac)
Calibrator
Calibrator Output
(A ac)
(A ac)
(V ac)
200, 2000
400, 2000
Min (A ac)
Max (A ac)
Range
Output
0.3 @ 60 Hz
20
45
200
400
44.00
46.00
0.66 @ 60 Hz
20
99
200
400
97.20
100.8
0.94 @ 60 Hz
20
141
200
400
138.6
143.4
2.0 @ 60 Hz
20
300
-------
400
295.2
304.8
0.266 @ 60 Hz
100
399
-------
400
392.7
405.3
2 @ 60 Hz
20
300
2000
2000
295.3
304.7
0.334 @ 400 Hz
100
501
2000
2000
482.0
520.0
0.50 @ 400 Hz
100
750
2000
2000
723
777
0.60 @ 400 Hz
100
900
2000
2000
869
931
0.60 @ 1 kHz
100
900
2000
2000
869
931
AC Current only calibrated to 900 amps.
1.
(6) Set Ammeter Calibrator output to minimum.
b. Adjustments. No adjustments can be made.
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25. Affix a
DA Label 163 to TI stating that DC Current calibrated to 1500 amps and AC Current
calibrated to 900 amps only.