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Before sending the device for repair
Symptom
No waveform is
displayed on the
connected waveform
measurement
instrument
A resonant sound is
emitted by the sensor
head.
The resonant sound
emitted by the sensor
head has grown
louder.
The positive and
negative components
of the demagnetization
waveform are
asymmetrical.
Check and/or remedy
• Perform demagnetization and zero-
adjustment again. (p. 37)
• Verify that the waveform measurement
instrument's input coupling parameter
is set to DC. (p. 39)
If this fails to remedy the issue, the
device may be malfunctioning.
Have it repaired.
A resonant sound may be emitted
depending on the amplitude and
frequency of the current being
measured. Such a sound may also
be emitted during demagnetization.
Measurement is not affected.
The gap between the upper and lower
sensors may have increased in size.
It is recommended to calibrate the
device since the gap may cause sensor
characteristics to vary.
This is not a malfunction. Verify that the
demagnetization and zero-adjustment
process results in an appropriate zero
position of the measurement waveform
instrument.
Troubleshooting
59
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