Table 4. Voltmeter Accuracy

Figure 1. Voltmeter accuracy check, equipment setup.

Test instrument

Electronic voltmeter or meter calibrator

Range

Indication

min

max

30V

10NV

9.1

10.9

30V'

20V

19.1

20.9

30V

29.1

30.9

300V*

300V

291.0

309.0

600V*

500V'

482.0

518.0

*Use Power Supply (AR) in place of (A4) for this check

NOTE

9. Resistance Accuracy. a. Performance Check.

Perform procedures given in (5) through (7) below

for AN/GSM-256 calibration.

NOTE

(5) Connect meter calibrator (A3) - (negative)

Substitute equipment in parentheses for AN/GSM-

terminal to TI L1 and +(positive) terminal to L2, using leads

256 calibration.

furnished with TI.

(1) Position controls and test leads on TI as in (a)

(6) Connect TI RX10 terminal to TI 3V range and

through (c) below:

'VM-terminal to TI-. Adjust meter calibrator for a 3-volt

(a) VM-RES Switch to RES.

indication on TI meter. Meter calibrator will indicate

(b) RX10 test lead to R jack.

between 2.91 and 3.09 volts dc.

(7) Repeat the procedures given in (6) above for TI

(2) Connect L1 and L2 on TI to decade resistor (A1)

range positions and meter indications listed in table 4.

(meter calibrator A3) using leads furnished with TI.

Meter calibration will indicate within limits specified.

(3) Set decade resistor (meter Calibrator) controls

b. Adjustments. No adjustments can be made.