TB 9-6625-2121-24
9. Dc Current
a. Performance Check
(1) Position controls as indicated in (a) and (b) below:
(a) AC POWER switch to OFF.
(b) CURRENT RANGE switch to X1.
(2) Connect equipment as shown in figure 1.
Figure 1. Dc current - equipment setup.
(3) Set dc current shunt range plugs to .00001 A.
(4) Adjust dc power supply and decade resistor to obtain a 5 A indication on TI dc
A meter. Multimeter will indicate between 49 and 51 mV dc.
(5) Repeat technique of (4) above for TI indications listed in table 4. Multimeter
will indicate within limits specified.
Table 4. Dc Current Accuracy
Test Instrument
Multimeter Indications
Indications
(mV dc)
( A)
Min
Max
4
39
41
3
29
31
2
19
21
1
9
11