TB 9-4931-363-50
6. Digital Multimeter Voltage Range and Accuracy (fig. 2)
a. Performance Check
(1) Set all switches having an OFF position to OFF.
(2) If a 115-volt, 60-Hz power source is to be used, connect power cable W3 between
J3 on the test set and the power source. If a 115-volt, 400-Hz power source is to be used,
connect power cable W4 between J3 on the test set and the power source.
(3) Set the POWER switch to ON-60 Hz if 60-Hz power is used. Set to ON-400 Hz if
400-Hz power is used. Observe that the POWER indicator lights. Set TEST SELECT
switch to 2.
(4) Connect the dc voltage calibrator to METER JACKS J16 and J17 with test
leads. Energize the dc calibrator.
(5) Set the dc voltage calibrator and the digital multimeter controls to the settings
given in table 4. For each setting, check that the digital multimeter reading is the same as
that of the dc calibrator within the tolerance specified.
Table 4. Performance Check
Function
Range
Test
Multimeter
Select
Select
Input
Reading
DCV
1
1.000 VDC
0.99 to 1.01
DCV
10
10.00 VDC
9.9 to 10.1
DCV
100
100.0 VDC
99.0 to 101.0
(6) If the indication is within tolerance, proceed to (7). If the digital multimeter
reading is out of tolerance, perform adjustment as indicated in b below.
(7) Deenergize and disconnect the dc calibrator.
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