TB 9-6625-174-24
APPENDIX B
PERFORMANCE TABLES
Westward Co., Model 33II
Table B-34. Calibration Description.
Test instrument parameters
Performance specifications
AC VOLTAGE
Range: 0 to 600 V ac
Accuracy: (1.2% rdg + 3 dgts) 40 to 500 Hz
AC CURRENT
Range: 0 to 600 A ac, 50 to 60 Hz
Accuracy: 200 A range: (1.9% rdg + 5 dgts); 600 A range: 0 to 400 A, (1.5%
rdg + 5 dgts); 400 to 600 A, (2.5% rdg + 5 dgts)
Range: 0 to 200 Ω
Accuracy: (1.5% rdg + 2 dgts)
Table B-35. AC Voltage.
Calibrator output
Test instrument
Applied
Range
Limits (V ac)
(V ac)
(V ac)
Min
Max
180 @ 40 Hz
600
175
185
180 @ 500 Hz
600
175
185
420 @ 40 Hz
600
412
428
420 @ 500 Hz
600
412
428
540 @ 40 Hz
600
531
549
540 @ 500 Hz
600
531
549
Table B-36. AC Current (≤500 A) (w/50-Turn Coil).
Calibrator output
Test instrument
Applied
Range
Limits (A ac)
(A ac)
(A ac)
Min
Max
3.6 @ 50 Hz
200
176.1
183.9
3.6 @ 60 Hz
200
176.1
183.9
7.2 @ 50 Hz
600
350
370
7.2 @ 60 Hz
600
350
370
Table B-37. AC Current (≤1000 A) (w/50-Turn Coil).
Calibrator output
Ammeter calibrator
Test instrument
Applied
Range
Range
Limits (A ac)
(V ac)
(A ac)
(A ac)
Min
Max
1.08 @ 50 Hz
20
600
521
559
1.08 @ 60 Hz
20
600
521
559
Table B-38. Resistance.
Calibrator output
Test instrument
Limits (%/Ω)
Applied
Range
(Ω)
(Ω)
Min
Max
190
200
-2.632% (185)
+2.632% (195)
B-9
