3-105. AC Voltmeter Replacement.See (42, fig. 3-18) and replace the ac voltmeter asfollows:CAUTIONOpen DC CONTROL CIRCUITBREAKER before testing orreplacing the ac voltmeter.a .Testing.(1) Gain access to rear of control cubiclepanel (96).(2) Connect multimeter with appropriate acvoltmeter connections across ac voltmeter terminals.(3) Perform preparation for starting proced-ure (fig. 2-6) and zero ac voltmeter with front panelVOLTAGE ADJUST control.(4) Perform starting procedure (fig. 2-7) steps1 through 4.(5) Check that readings on multimeter and acvoltmeter do not differ by a voltage greater than thatlisted below for each setting of the AMPS-VOLTSselector switch.(a)240/416 V operation.AMPS-VOLTSsettingVoltage DifferenceL1-L2 . . . . . . . . . . . . . . . ...34 VL1-L0 . . . . . . . . . . . . . . . ...22 V(b)120/208 V operation.AMPS-VOLTSsettingVoltage DifferenceL1-L2 . . . . . . . . . . . . . . . ...21 VL1-L0 . . . . . . . . . . . . . . . ...11 V(6) If voltage differences, greater than thosespecified above are obtained, the ac voltmeter isfaulty and must be replaced. Faulty ac voltmetermust be forwarded to higher maintenance level forrepair.(7) Stop engine generator (fig. 2-8).(8) Disconnect multimeter and secure controlcubicle panel.b .Removal.(1) Gain access to rear of control cubiclepanel (96).(2) Tag and remove ac voltmeter (42) leads.(3) Remove screws (40) and nuts (41) whichsecure ac voltmeter and remove ac voltmeter.c.Installation. Install replacement ac voltmeterusing removal steps in reverse order. Remove tags.3-106. Kilowatt Met er Replacement.See (39, fig. 3-18) and replace the kilowatt meter asfollows:a. Removal.—(1) Gain access to rear of control cubiclepanel (96).(2) Tag and remove kilowatt meter (39) leads.(3) Remove three screws and nuts which securekilowatt meter and remove kilowatt meter.b. Installation.Install replacement kilowattmeter using removal steps in reverse order. Removetags.3-107. Watt meter Converter Inspection and Replace -ment.See (102, fig. 3-18) and proceed as follows:a. Inspection.Gain access to interior of controlcubicle and inspect wattmeter converter for signs ofcorrosion, loose mounting, loose electrical connec-t ions, or evidence of damage.b. Removal.—(1) Gain access to rear of control cubiclepanel (96).(2) Tag and remove electrical leads.(3) Remove screws (100) and nuts (101) whichsecure wattmeter converter (102) and remove watt-meter converter.c. Installation.Install replacement wattmeterconverter (102) using removal steps in reverseorder. Remove tags.3-108. AC Ammeter Replacement,See (8, fig. 3-18) and replace the ac ammeter (8) asfollows:a. Removal.—(1) Gain access to rear of control cubiclepanel (96).(2) Tag and remove ac ammeter leads.(3) Remove three screws and nuts which secureac ammeter (8) and remove ac ammeter.b. Installation.Install replacement ac am-m e t e r ( 8 ) r e m o v a l s t e p s i n r e v e r s e o r d e r .Remove tags.3-39
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