16
IM 701933-01E
2.
Pull the open/close lever to open the sensor head.
3.
Orient the probe so that the current direction arrow on the tip of the
sensor points in the same direction as the flow of current in the conductor
under measurement. Position the probe clamp around the conductor
under measurement so that the conductor is centered in the clamp hole.
4.
Press the open/close lever until the unlocked indicator goes out, then
confirm that the open/close lever is securely locked and that the sensor
head is securely closed.
5.
You can now perform observation of the current waveform on the
waveform measuring instrument. The output voltage rate of the 701933
is 0.1 V/A. Convert the voltage sensitivity on the waveform observation
instrument to current sensitivity. For example, if the waveform observation
instrument’s voltage sensitivity is 10 mV/DIV, the current sensitivity would
be 100 mA/DIV.
Note
• The output from this probe is terminated internally. Use the probe with a waveform
measuring instrument having an input impedance of 1 MΩ or more.
• Immediately after turning the power ON, the probe may experience a large
offset drift due to self-heating, but this will mostly stabilize after approximately 30
minutes.
• Please note that during continuous measurement, the offset voltage can drift
depending on ambient temperature and other factors.
• In rare instances, connecting the power plug to a power supply that is ON can
cause oscillations, but malfunctions will not occur. If this occurs, opening and
closing the sensor head using the open/close lever will stop the oscillations and
restore normal functioning.
• Resonance can be generated depending on the frequency of the measured
current. This will not affect measurement.
• The position of the conductor under measurement within the clamp hole can affect
measurement. Keep the conductor in the center of the clamp hole.
• During measurement, press the open/close lever until the unlocked indicator goes
out, then confirm that the lever is securely locked and that the sensor head is
securely closed. Accurate measurements cannot be obtained if the sensor head is
not securely closed.
• In the high frequency domain, positioning the probe clamp on the high side of the
circuit can introduce common mode noise. As necessary, limit the bandwidth of
the waveform observation instrument, or position the probe clamp on the low side.
Emission source
Load
High
Low
• Accurate measurements may not be possible if operated within close proximity to
strong magnetic fields such as those produced by transformers, circuits with large
currents, and wireless devices.