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IM 701931-01E
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Measurement Procedure
CAUTION
• The maximum continuous input range is based on heat that is internally
generated during measurement. Never input current in excess of this
level. Doing so may result in damage to the probe.
• The maximum continuous input range varies according to the frequency
of the current being measured. See page1-10, “Product Specifications.”
• If excess current is input, generated heat activates a built-in safety
function that blocks normal output. If this happens, remove the input
immediately (remove the sensor from the conductor being measured, or
reduce the input current to zero). Wait until the sensor has had sufficient
time to cool before resuming operation.
• Heat generated by an input current whose frequency is 1 kHz or higher
is mainly due to self-heating of the sensor head. In this case, the
protection function is not activated. Therefore, be careful of burns, short
circuits, and other accidents or sensor damage and the like caused by
the temperature increase.
• If you continuously input a current even if it is below the maximum
current value established by the maximum continuous input range,
the self-heating of the sensor may cause the safety function of the
instrument to activate in order to prevent damage to the instrument.
• At high ambient temperatures, the built-in safety circuit may activate at
current input levels below the rated continuous maximum.
• Continuous input of current exceeding the rated maximum, or repeated
activation of the safety function may result in damage to the unit.
• The specifications indicating the maximum input range lists the
maximum peak current at 700 Apeak when non-continuous in addition to
the continuous maximum input range. This indicates an upper waveform
response limit of 700 Apeak. Use the sensor at the RMS current input
levels that is within the rated continuous maximum.
• Open the clamp only by using clamp lever.
• To maintain the probe accuracy within the specifications and to verify
that correct measurement results are being obtained, periodic calibration
is necessary. The calibration period varies depending on your operating
environment and the frequency of use. We recommend that you set
a calibration period according to the frequency of use and ask us to
calibrate it periodically.
701931 Current Probe
