7. MEASURING PROCEDURES
7-1 MEASURING INSTRUMENTS
(1)VOLTMETER
AC voltmeter is necessary.
The approximate AC voltage ranges of the voltmeters to be used for various types of generators are as follows :
0 to 150 V : Type with an output voltage
of 110 or 120 V
0 to 300 V : Type with an output voltage of 220, 230 or 240 V
0 to 150 V, 0 to 330 V : Dual voltage type
(2)AMMETER
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 10 A, 20 A, 100 A)
(3) FREQUENCY METER Frequency range : About 45 to 65Hz
NOTE : Be careful of the frequency meter's input voltage range.
FOR AC
FOR AC
