TB 9-6625-2352-35
Table 3c. ME-297/U Ac Volts
Calibration Performance Limits and Adjustments
Ac Voltage
Test instrument
Calibrator
Test instrument
Ac volts
Indication
Initial output
err indication
Adjustments
range
(V)
(V)
(Hz)
(%)
50
50
50
400
4
R42 (R)
2.5
2.5
2.5
400
4
R411 (R)
10
10
10
400
4
----
250
250
250
400
4
----
500
500
500
400
4
----
1000
1000
1000
400
5
----
2
5000
700
700
400
50
----
3
Recheck 50 V range and, if necessary, readjust R42 (fig. 1) and R41 (fig. 1) for best in-tolerance condition.
1
Reduce output to minimum and move positive lead from TI V-Ω-A input to TI AC/DC 1000 Ω/V 1000 V input.
2
3 Reduce output to minimum and move positive lead to TI AC/DC 1000 Ω/V 5000 V input.
Table 3d. ME-297/U Resistance
Calibration Performance Limits and Adjustments
Resistance
Resistance standard indications
Test instrument
Test instrument
(Ω)
Indications
Resistance
ohms scale
range
Min
Max
Adjustments
(Ω)
1
X1
02
---
---
Short leads, adjust
OHMS ZERO
X1
25
22.0
28.0
X10
25
220
280
for 0 indication.
X100
25
2200
2800
Open leads, adjust
OHMS INF
X1000
25
22,000
28,000
X10,000
25
220,000
280,000
for ∞ indication.
1 Adjust
OHMS ZERO and OHMS INF controls for each range.
If 0 indication cannot be obtained, set OHMS ZERO control to mid-position, short leads, and adjust R36 (fig.1) for 0
2
indication.
Table 3e. ME-297/U Dc Current
Calibration Performance Limits and Adjustments
Dc Current
Test instrument
Calibrator
Test instrument
Indication
Initial output
err indication
Adjustments
Dc mA range
(mA)
(mA)
(%)
.25
.25
.25
3
R50 (R)
2.5
2.5
2.5
3
----
10
10
10
3
----
50
50
50
3
----
100
100
100
3
----
500
500
500
3
----
2500
2500
2500
3
----
10 A1
10 A
10 A
3
----
Reduce output to minimum and connect TI positive lead to +10A input.
1
7