8-1 MEASURING INSTRUMENTS
8-l -1 VOLTMETER
AC voltmeter is necessary. The approximate AC volt-
age ranges of the voltmeters to be used for various
types of generators are as follows:
oto150v :
Type with an output voltage of 11OV
or 12OV
0 to 3oov :
Type with an output voltage of 22OV,
230V or 24OV
8-l-3 FREQUENCY METER
Frequency range: About 45 to 65 Hz.
NOTE: Be careful of the frequency meter’s input
voltage range.
FOR AC
8-l-2 AMMETERS
I
AC ammeter is necessary. An AC ammeter with a
range that can be changed according to the current
rating of a given generator is most desirable. (About
1 OA, 20A, 1 OOA)
Prepare a DC ammeter which has a scale range of
15A.
Fig. 8- 1
Fig. 8-2
Fig. 8-3
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