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IM 701930-01E
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App
Index
• The probe is rated for maximum input under two conditions in addition to
the input maximums shown in the Product Specifications. These are: (1)
300 Apeak, for non-continuous input, and (2) 500 Apeak at Pulse Width
≤ 30 µs. (1) indicates an upper waveform response limit of 300 Apeak.
Use the sensor at RMS current input levels that are within the rated
continuous maximums. (2) indicates the upper response limit for a single
input pulse. Use the sensor at levels not exceeding this value.
• 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.
1.
Check that the system is safe, and that the preparations described in the
preceding section have been carried out.
2.
Pull the sensor opening lever so that the sensor head opens.
3.
Align the sensor so that the current direction indication corresponds to
the direction of current flow through the conductor to be measured, and
clamp so that the conductor is in the center of the sensor aperture.
4.
Press the clamp lever on the sensor head until the
LOCK
indicator
appears (and the
UNLOCK
indication disappears), and check that the
opening lever is firmly locked and the clamp is securely closed.
5.
It is now possible to monitor the current waveform. The output voltage
rate of the 701930 is 0.01 V/A. Convert the voltage sensitivity of the
waveform observation instrument to current sensitivity. For example, if the
voltage sensitivity is 10 mV/DIV, the current sensitivity is 1 A/DIV.
Note
• The output of this unit is terminated internally. Use a waveform measurement
instrument with an input impedance of at least 1 MΩ.
• Immediately after powering on, this unit may be subject to an appreciable offset
drift due to the effect of self-heating. To counteract this, allow the unit to warm up
for about 30 minutes before carrying out measurement.
701930 Current Probe
