TB 9-6625-174-24
APPENDIX B
PERFORMANCE TABLES
A. W. Sperry, Model DSA-500
Table B-187. Calibration Description.
Test instrument parameters
Performance specifications
DC VOLTAGE
Range: 0 to 600 V dc
Accuracy: (1.5% rdg + 5 dgts)
AC VOLTAGE
Range: 0 to 600 V ac
Accuracy: 50 to 60 Hz, (2.0% rdg + 5 dgts)
AC CURRENT
Range: 0 to 400 A ac
Accuracy: 50 to 60 Hz: (2.0% rdg + 6 dgts)
Range: 0 to 4000 Ω
Accuracy: (2.0% rdg + 5 dgts)
Table B-188. DC Voltage.
Calibrator output
Test instrument
Applied
Range
Limits (V dc)
(V dc)
(V dc)
Min
Max
120
400
117.7
122.3
280
400
275.3
284.7
360
400
354.1
365.9
-360
400
-365.9
-354.1
540
600
527
553
Table B-189. AC Voltage.
Calibrator output
Test instrument
Applied
Range
Limits (V ac)
(V ac)
(V ac)
Min
Max
360 @ 50 Hz
400
352.3
367.7
360 @ 60 Hz
400
352.3
367.7
540 @ 50 Hz
600
524
556
540 @ 60 Hz
600
524
556
Table B-190. AC Current (≤500 A) (w/50 Turn Coil).
Calibrator output
Test instrument
Applied
Range
Limits (A dc)
(A ac)
(A ac)
Min
Max
0.72 @ 50 Hz
40
35.22
36.78
0.72 @ 60 Hz
40
35.22
36.78
7.2 @ 50 Hz
400
352.2
367.8
7.2 @ 60 Hz
400
352.2
367.8
Table B-191. Resistance.
Calibrator output
Test instrument
Limits (%/Ω)
Applied
Range
(Ω)
(Ω)
Min
Max
190
400
-2.2632% (185.7)
+2.2632% (194.3)
1.9 k
4000
-2.2632% (1857)
+2.2632% (1943)
B-55
