TB 9-6625-2352-35
Table 6c. Simpson, Model 260-3 Ac Voltage
Ac Voltage
Test instrument
Calibrator
Test instrument
1
Ac volts
Indication
Initial output
err indication
Adjustments
range
(V)
(V)
(Hz)
(%)
250
250
250
60
3
R31 (R)
2.5
2.5
2.5
60
3
R282 (R)
10
10
10
60
3
----
50
50
50
60
3
----
1000
1000
1000
60
3
----
5000
900
900
60
16.67
----
3
TI must be calibrated in horizontal position.
1
Recheck 250 V range and, if necessary, readjust R31 (fig. 3) and R28 (fig. 3) for best in-tolerance condition.
2
3 Reduce output to minimum and move positive lead from TI + input to TI A.C. 5000 V input. After 5000 V check is complete,
reduce output to minimum and move positive lead to TI + input.
Resistance
Test instrument
Test instrument
1
(Ω)
Indications
Resistance
ohms scale
range
Min
Max
Adjustments
(Ω)
2
RX1
12
10.5
13.7
RX100
12
1050
1370
None
RX10,000
12
105,000
137,000
TI must be calibrated in horizontal position.
1
2 Short
leads and adjust ZERO OHMS for a 0 indication on ohms scale. Repeat for each range.
Table 6e. Simpson, Model 260-3 Dc Current
Dc Current
Test instrument
Calibrator
Test instrument
1
Indication
Initial output
err indication
Adjustments
Dc current range
(A)
(A)
(%)
50 A
50 A
50 A
3
----
2
100 A
100 A
100 A
3
----
1 mA
1 mA
1 mA
3
R27 (R)
1 mA
.6 mA
.6 mA
5
----
1 mA
.2 mA
.2 mA
15
----
10 mA
10 mA
10 mA
3
----
100 mA
100 mA
100 mA
3
----
500 mA
500 mA
500 mA
3
--
10 A3
10 A
10 A
3
R22 (R)
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.
13