TB 9-6625-1188-24
Figure 2. Range and linearity - equipment setup.
Table 4. Range and Linearity Check
Test instrument
Calibrator indication
RANGE switch
Meter indication
Min
Max
setting
1 MA1
1
0.87 mA
1.13 mA
10 MA
1
9.6 mA
10.4 mA
30 MA
3
29 mA
31 mA
100 MA
0.2
16.9 mA
23.1 mA
100 MA
0.4
36.9 mA
43.1 mA
100 MA
0.6
56.9 mA
63.1 mA
100 MA
0.8
76.9 mA
83.1 mA
100 MA
1
96.9 mA
103.1 mA
300 MA
3
290.9 mA
309.1 mA
2
1000 MA
1
969.9 mA
1.0301 A
1 A1
1
969.9 mA
1.0301 A
13
3 A
3
2.9099 A
3.0901 A
1
10 A
1
9.6999 A
10.3001 A
1Model
428B.
2Model
428A.
3Switch
to Connection B.
b. Adjustments
(1) Set RANGE switch to 100 MA.
(2) Set calibrator for a 100 mA dc output.
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