TB 9-6625-2352-35
Table 5e. Simpson, Model 260 Dc Current
Calibration Performance Limits and Adjustments
Dc Current
Test instrument
Calibrator
Test instrument
1
Indication
Initial output
err indication
Dc current range
(A)
(A)
(%)
Adjustments
50 A2
50 A
50 A
3
100 A
100 A
100 A
3
1 mA
1 mA
1 mA
3
1 mA
.6 mA
.6 mA
5
1 mA
.2 mA
.2 mA
15
None
10 mA
10 mA
10 mA
3
100 mA
100 mA
100 mA
3
500 mA
500 mA
500 mA
3
10 A
10 A
10 A
3
3
TI must be calibrated in horizontal position.
1
Connect positive lead to TI +50 A input. After 50 A check is complete, reduce output to minimum and move positive lead
2
to TI + input.
3 Reduce output to minimum and connect TI negative lead to -10A input and connect TI positive lead to +10A input.
Table 6a. Simpson, Model 260-3 Specifications
Test instrument parameter
Performance specification
Dc voltage
Range: 0 to 5000 V
Accuracy: 3% of FS
Ac voltage
Range: 0 to 5000 V
Accuracy: 3% of FS
Range: 0 to 20 MΩ
Accuracy: 3 of arc
Dc current
Range: 0 to 10 A
Accuracy: 3% of FS
Table 6b. Simpson, Model 260-3 Dc Voltage
Calibration Performance Limits and Adjustments
Dc Voltage
Test instrument
Calibrator output
Test instrument
1
Dc volts
Indication
Initial
Limits
range
(V)
output (V)
Min
Max
Adjustments
2.5
2.5
2.5
2.425
2.575
10
10
10
9.7
10.3
50
50
50
48.5
51.5
None
250
250
250
242.5
257.5
1000
1000
1000
970
1030
5000
5000 (900)
5000 (900)
4850 (750)
5150 (1050)
2
TI must be calibrated in horizontal position.
1
Replace calibrator with power supply. Move positive lead to TI D.C. 5000 V input. Calibrate at 900 V if power supply not
2
available. After 5000 V check is complete, reduce output to minimum and move positive lead to TI + input.
12
