FIELD AMPS/REG VOLTS Meter

TB 9-4920-359-35

(5) Set power amplifier OUTPUT VOLTAGE RANGE switch to 200 V.

(6) Adjust POWER AMPLIFIER GAIN control to 115 V at 400 Hz, as indicated on

GEN/PMG VOLTS and FREQUENCY meters. CT TEST CURRENT meter will indicate

between 0.9 and 1.1 mA dc.

(7) Adjust resistance standard to each setting listed in table 4. CT TEST

CURRENT meter will indicate within the limits specified.

(8) Adjust POWER AMPLIFIER GAIN control fully ccw and set power amplifier

OUTPUT VOLTAGE RANGE switch to 30 V.

(9) Press calibrator RESET key. Disconnect all equipment from TI.

Table 4. CT TEST CURRENT Meter

Resistance standard

Test instrument CT TEST CURRENT meter indications

settings

(mA dc)

Min

Max

(Ω)

2100

1.4

1.6

1500

1.9

2.1

1100

2.4

2.6

b. Adjustments. No adjustments can be made.

11. FIELD AMPS/REG VOLTS Meter

a. Performance Check

(1) Connect calibrator OUTPUT HI directly to pin g and LO to pin S of J1.

(2) Set READ REG BUS VOLTS-FLD CUR switch to up position.

(3) Adjust calibrator output for a 30 V dc indication on FIELD AMPS/REG VOLTS

meter. Calibrator will indicate between 28 and 32 V dc.

(4) Set calibrator to STBY and disconnect from TI.

(5) Connect calibrator amplifier CURRENT OUTPUT HI to pin J and CURRENT

OUTPUT LO to pin f of J1.

(6) Set READ REG BUS VOLTS-FLD CUR switch to down position.

(7) Enter 1 A dc in calibrator display and press calibrator BOOST key.

(8) Adjust calibrator output for a 1 A dc indication on FIELD AMP/REG VOLTS

meter. Calibrator will indicate between 0.8 and 1.2 A dc.

(9) Repeat technique of (8) above at FIELD AMP/REG VOLTS meter indications

listed in table 5. Calibrator will indicate within limits specified.

(10) Press calibrator RESET and disconnect from TI.