
DRAWING No.EM7000 09-1306 2040 2040
The frequency characteristics are good, but an indication
error will increase for high frequencies. (See
8-
3)
Read the indication by multiplying 0 - 120 graduations by 10
in the 750 V range. Never perform measurement exceeding
750 V to ensure safety.
After over voltage was applied, the meter will swing out for
a while even if the input is removed, but this is not a
problem, and the pointer will return to the zero position in a
few seconds.
Because the instrument is super-sensitive, the meter may move
by just connecting test leads, but it is not failure of the
instrument.
It may malfunction when measuring voltage/current in the
inverter circuit.
Differences of indicated values between general testers and
this unit according to measuring waveforms
1. Measurement of sine wave AC
Both general testers and this unit indicate root-mean-square
values.
2. Measurement of distorted wave AC
General testers: Indicate a value proportional to the mean value.
Accordingly, the read value is lower than the actual root-
mean-square value.
This unit: Indicates a value proportional to the p-p value
regardless of waveforms.
Accordingly, the indicated value on the rms scales ACV (rms) is
higher or lower than the actual root-mean-square value
depending on voltage waveforms.
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EM7000_08_英_再校 13.6.10 1:26 PM ページ14
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