TB 9-6625-2146-35
Dc voltage standard indications (V)
Test instrument
TS-433/U
TS-340/U and Weston, Models 430, 455,
range
622 series, 901 and 931
0.25%
0.5%
Min
Max
Min
Max
20
V
---
---
19.9
20.1
30
V
---
---
29.85
30.15
50
V
---
---
49.75
50.25
60
V
---
---
59.70
60.30
75
V
---
---
74.625
75.375
100
V
---
---
99.50
100.5
125
V
---
---
124.37
125.63
150
V
149.625
150.375
149.25
150.75
200
V
---
---
199.0
210.0
250
V
---
---
248.75
251.23
300
V
---
---
298.5
301.5
400
V
---
---
398.0
402.0
450
V
---
---
447.75
452.25
500
V
---
---
497.5
502.5
600
V
---
---
597.0
603.0
750
V
---
---
746.25
753.75
1000
V
---
---
995.0
1005.0
1Connect
dc voltage standard to voltage divider input and divider output to TI. Set divider to .001000.
2Set
voltage divider to .01000.
3Remove dc voltage divider from setup.
9. Dc Amps
a. Performance Check
(1) Set TI function switch (if applicable) to dc amps and set range switch to lowest
range.
(2) Connect equipment as shown in figure 1.
NOTE
Position dc current shunt (A3) range plugs as required for
range being calibrated. Also set decade resistor (A8) controls
as required for current limiting and remove when current
exceeds decade resistor current capability.
(3) Adjust dc power supply (A4) and decade resistor as required for full-scale
indication on TI meter. Digital voltmeter will indicate within limits specified under
accuracy in table 4 for TI being calibrated.
7
