TB 9-6625-2352-35
Table 11e. Simpson, Model 270 Dc Current
Dc Current
Test instrument
Calibrator
Test instrument
1
Indication
Initial output
err indication
Adjustments
Dc current range
(A)
(A)
(%)
50 A2
50 A
50 A
2
----
1 mA
1 mA
1 mA
2
R27 (R)
10 mA
10 mA
10 mA
2
----
10 mA
6 mA
6 mA
3.33
----
10 mA
2 mA
2 mA
10
----
100 mA
100 mA
100 mA
2
----
500 mA
500 mA
500 mA
2
----
10 A
10 A
10 A
2
R22 (R)
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 12a. Triplett, Model 310 Specifications
Test instrument parameter
Performance specification
Dc voltage
Range: 0 to 1200 V
3% of FS
Accuracy:
Ac voltage
Range: 0 to 1200 V
4% of FS
Accuracy:
Range: 0 to 20 MΩ of dc scale
3%
Accuracy:
Dc current
Range: 0 to 600 mA
3% of FS
Accuracy:
23