TB 9-6625-2354-35
Table 12c. Simpson, Model 260-7P Ac Voltage
Calibration Performance Limits and Adjustments
Ac Voltage
Test instrument
Calibrator
Test instrument
1
Ac volts
Indication
Initial output
err indication
Adjustments
range
(V)
(V)
(Hz)
(%)
(fig. 2) (R)
2.5
2.5
2.5
60
3
R25
10
10
10
60
3
----
50
50
50
60
3
----
250
250
250
60
3
R22
500
500
500
60
3
----
1000
1000
1000
60
3
----
2
TI must be calibrated in horizontal position.
1
Reduce output to minimum and move positive lead from TI + input to TI 1000V DC/AC input. After 1000V check is
2
complete, reduce output to minimum and move positive lead to TI + input.
Table 12d. Simpson, Model 260-7P Resistance
Calibration Performance Limits and Adjustments
Resistance
Resistance standard indications
Test instrument
(Ω)
Test instrument
1
Indications
Resistance
ohms scale
range
(Ω)
Min
Max
Adjustments
2
RX1
12
10.7
13.5
RX100
12
1110
1300
None
RX10,000
12
111,000
130,000
TI must be calibrated in horizontal position.
1
2 Short
leads and adjust OHMS ADJ for 0 indication on ohms scale. Repeat for each range.
Table 12e. Simpson, Model 260-7P Dc Current
Calibration Performance Limits and Adjustments
Dc Current
Test instrument1
Calibrator
Test instrument
Indication
Initial output
err indication
Adjustments
Dc current range
(A)
(A)
(%)
(fig. 2) (R)
50 A
50 A
50 A
1.5
R1
2
1 mA
1 mA
1 mA
2
R2
10 mA
10 mA
10 mA
2
----
10 mA
6 mA
6 mA
3.3
----
10 mA
2 mA
2 mA
10
----
100 mA
100 mA
100 mA
2
----
500 mA
500 mA
500 mA
2
----
10 A3
10 A
10 A
2
----
TI must be calibrated in horizontal position.
1
Connect positive lead to TI +50A/250mV input. After 50 A check is complete, move positive lead to TI + input.
2
3 Connect TI negative lead to -10A input and connect TI positive lead to +10A input.
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