11
IM 701933-01E
Description of Parts
1 Open/Close Lever
This lever opens and closes the sensor head. Always use this lever when
opening and closing the sensor head.
2 Sensor Head
The sensor head clamp is positioned around the conductor under
measurement to detect current. It is a precision-assembled component
consisting of various parts including plastic molded parts, a ferrite core, and a
Hall element. Take proper care when handling the probe to avoid damage as
a result of sudden sharp changes in ambient temperature, mechanical stress,
or physical shocks.
3 Demagnetization Switch (DEMAG)
This switch demagnetizes the core which can become magnetized when
turning the power ON or OFF, or when applying excessive input. You must
always use this switch prior to performing measurement. The time required
for demagnetization is approximately one second. During demagnetization, a
degaussing waveform is output.
4 Zero Adjust Dial (ZERO ADJ)
The zero adjust dial lets you compensate for effects including the probe’s
offset voltage and temperature drift. Before performing measurement,
demagnetize the probe then carry out zero adjustment.
5 Coarse Adjustment Trimmer
This is used only when zero adjustment cannot be performed using the zero
adjust dial alone.
6 Output Terminal
This terminal is connected to a waveform measuring instrument (of 0.1 V/A,
input impedance 1 MΩ) and outputs the current waveform of the conductor
under measurement at a constant rate. The terminal connects to the BNC
input terminal of the waveform observation instrument.
7 Power Plug
Connect the power plug to the receptacle on the power supply (model 701934
or 700938) to supply power to the sensor and terminator.
Note
• The output from this probe is terminated internally. Use the probe with a waveform
measuring instrument of high input impedance. Accurate measurement cannot be
obtained at an input impedance of 50 Ω.
• When using an input terminal other than the BNC terminal (for example via a
BNC-to-banana plug or other adapter), make sure the polarity of the input terminal
is correct.
• Turn the connector until it clicks into place, and confirm that it is securely locked.
• To adjust the coarse adjustment trimmer, use a non-metallic flat-blade screwdriver
whose thickness is 0.4 mm, width is 1.8 mm, and length is 10 mm or longer.
• Do not press or turn the coarse adjustment trimmer by force using a screwdriver.
Doing so may damage the component.