Hioki CM4141-50, Инструкция по эксплуатации

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90
Troubleshooting
Problem Cause Remedy
Measured value differ from
those of another clamp-on
current.
Measured waveforms contain a
component that falls outside the
frequency characteristics range.
Measured waveforms contain a
component that falls outside the
frequency characteristics.
If the jaw is damaged or cracked, it
will not be able to measure current
accurately.
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.
The current value is larger
than expected.
A current value is displayed
even with no input.
There is a transformer or high-
current circuit that emits a strong
magnetic field near the instrument.
Otherwise, there is a wireless device
that emits a strong electric field.
Perform measurement keeping
the instrument away from such
equipment.
The instrument’s jaw emits
sound (vibration).
Greater than or equal to 500 A of AC
current is being measured.
The jaw may emit sound
(vibration); however, there is no
effect on the measurement.
The measured value does not
appear.
The test leads have a break. Check the continuity of the test
leads. (p. 41)
If a break is found, replace the test
leads.
HIOKI CM4141C961-00