TB 9-6625-2146-35
Table 6. Ac Current
Digital voltmeter indications (V ac)
Westinghouse,
General Electric,
Model PA5
Weston, Model 749
Model AK-4
20 to 135 Hz
at 400 Hz Only
Weston, Models 633
ME-65/U and
ME-79/USM-33
Series and 749 At
ME-65A/U, Weston
Test
ME-79A/USM-33
60 Hz only
Models 155 and 904
Weston, Model 528
instrument
50 to 1000 Hz
ME-489/U
25 to 500 Hz
25 to 500 Hz
range
0.5%
2%
3%
5%
Min
Max
Min
Max
Min
Max
Min
Max
15 mA
---
---
.98
1.02
---
---
---
---
50 mA
---
---
.98
1.02
---
---
---
---
100 mA
---
---
.98
1.02
---
---
---
---
.5 A
.995
1.005
.98
1.02
---
---
---
---
1 A
.995
1.005
.98
1.02
---
---
---
---
2 A
.995
1.005
---
---
---
---
---
---
2.5 A
.995
1.005
---
---
---
---
---
---
3 A
.995
1.005
.98
1.02
---
---
---
---
5 A
.995
1.005
.98
1.02
---
---
---
---
6 A
---
---
---
---
.97
1.03
.95
1.05
10 A
.995
1.005
.98
1.02
.97
1.03
---
---
15 A
.995
1.005
.98
1.02
.97
1.03
.95
1.05
20 A
.995
1.005
---
---
---
---
---
---
25 A
.995
1.005
---
---
.97
1.03
---
---
30 A
---
---
.98
1.02
.97
1.03
.95
1.05
50 A
.995
1.005
.98
1.02
.97
1.03
---
---
60 A
---
---
---
---
.97
1.03
.95
1.05
100 A1
.995
1.005
---
---
.97
1.03
---
---
150 A1
---
---
---
---
.97
1.03
.95
1.05
200 A1
.995
1.005
---
---
---
---
---
---
250 A1
---
---
---
---
.97
1.03
---
---
300 A1
---
---
---
---
.97
1.03
.95
1.05
500 A1
---
---
---
---
.97
1.03
---
---
800 A1
---
---
---
---
.97
1.03
---
---
1000 A1
---
---
---
---
.97
1.03
---
---
2000 A1
---
---
---
---
.97
1.03
---
---
1Check
these ranges at the maximum capability of the ac power supply and ac current calibrator.
14
