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10. MEASURING PROCEDURES
AC VOLTMETER
DC VOLTMETER
10-l METERS
10-1-l VOLTMETERS
Both AC and DC voltmeters are nesessar! .
The approximate AC voltage ranges of the voltmeters to be
used for various types of generators are as follows:
0 to 1 SOV: Type with an output voltage of 110 or
12ov
0 to 300V: Type with an output voltage of 220.230
or 21OV
Fig. 70-l
10-l-2 AMMETER
Both AC and DC ammeters are necessary.
The AC ammeter must have a scale range from 0 to ap-
proximately 10A.
AC AMMETER
DC AMMETER
The DC ammeter must have a scale range from 0 to ap-
proximately 15A.
Fig. 10-2
10-l-3 FREQUENCY METER
The frequency meter must have a scale range from 45 to ap-
proximately 65 Hz.
NOTE: Note the range of input voltage of the frequency
meter.
Fig. 70-3
-2l-