Shenzhen Zhiyong Electronics Co., Ltd
3. Making Measurements
Before using the probe, check that the system is safe and that the preparations described in Safe
Probing.
Have a visual inspection of the current probe of high frequency CP8000 Series probes, power
supply, cable and oscilloscope.
The output of the current probe is terminated internally. Use a high impedance input to the
measuring instrument. Accurate measurements are not possible when the input impedance of
the oscilloscope is set to 50Ω. Be sure to set the input impedance to 1 MΩ before making
measurements. Set the oscilloscope’s input coupling to DC. With the oscilloscope input at
ground, adjust the trace to the zero position. Connect the probe’s output connector to the
oscilloscope’s input connector.
Connect the power supply to probe and the power indicator will light. Select suitable Range
you want via the Range Key.
Ensure that the probe sensor is NOT clamped around any conductors. Slide the probe’s
Opening Lever into the LOCKED position as shown in Figure. Confirm that the sensor head
is properly closed.
Degaussing and Zero Setting
When the key is pressed, the probe will demagnetizes the core and set the output to zero
voltage if it has been magnetized by switching the power on and off, or by an excessive input.
Always carry out demagnetizing and Zero Setting before measurement and without current in
the clamp. The demagnetizing and Zero Setting process takes about 5 seconds. During
demagnetizing and Zero Setting, a demagnetizing waveform is output.
If degaussing and Zero Setting succeeds, the buzzer will make two short beeps. If degaussing
and Zero Setting failed, the buzzer will make a single sound, for one second.
Do not demagnetize while the conductor being measured is clamped.
This could damage the components of the circuit being measured. Also, check that the
conductor being measured is not clamped when supplying power to the current probe for the
same reason. Demagnetized waveforms are generated when switching on the supply.
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