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107
4
Maintenance and Service
4.1 Troubleshooting
Problem
Cause
Remedy
The instrument is
indicating an abnormal
measured value.
The measured value is lower
than the lower limit value of the
measuring range.
Wrap the wire around the jaw one or more
times. Wrapping the wire
n
times can increase
the displayed value by (
n
+ 1) times.
The tips of the jaw open.
Close the jaw tips.
The jaw is damaged.
The instrument with its jaw damaged cannot
measure current accurately. Have the
instrument repaired.
Displayed values can frequently
fluctuate due to induction potential even with no
input. This, however, is not a malfunction.
Measured value differ
from those of another
clamp-on current meter.
Measured waveforms contain a
component that falls outside the
frequency characteristics range.
The instrument cannot accurately measure
waveforms that contain a component that falls
outside the frequency characteristics range.
The instrument, which uses the true RMS method, can accurately measure
distorted waveforms. When measuring a distorted waveform, the measured value
will differ from a clamp-on current meter that uses the averaging method.
4 Maintenance and Service
HIOKI CM4371C961-00
Содержание CM4371-50
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