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The continuous maximum input range is the fixed value caused by the machine’s operating heat. Please
do not put in current higher than this value, or the device will be damaged.
The continuous maximum input range will change according to the frequency of the current under test.
The probe will be damaged when operate under overcharged current .
When the input current continuously surpasses the maximum input range, the self-protection will be
activated by the heating of the sensor and cause wrong output. Please stop the current input and wait for
full cool down before next operation.
The protection circuit will be mistakenly activated by the high temperature even when the continuous
current under test is below the max input.
When the connect input surpass the max input range current and activate the protection function too
often, the device may be damaged.
You must open the entire part through switch controller.
At the lock state, please do not press the entire part as shown below.
7.1 Preparation before testing
Prepare the high frequency current probe UT-P4000 series, adapter and oscilloscope
Power up the UT-P4000 probe and the green LED power indicator will be lighted.
Set the oscilloscope: Ground the measuring mode, zero set the oscilloscope and turn the
oscilloscope mode to DC mode.
Choose the proper range according to the current under test. The default setting of the probe is
large current range
7.2 Degaussing and Zero setting
Connect the UT-P4000 with oscilloscope (Make sure the input impedance of the oscilloscope is
1MΩ)
Lock the probe until the UNLOCK symbol disappear.
Press the button to degauss and zero set. There will be beeping as success indication after 6s
7.3 Measuring method
Confirm the previous steps
Pull the switch control pole of the sensor, open the head of the sensor and make the current
direction mark in front of the sensor accordance with the current under test, and put the conductor
under test in the middle of the sensor.
Push the switch control pole of the sensor until the UNLOCK mark disappear. Lock the probe,
make sure the entire part is closed, and then observe the waveform under test. Utilize the current
transfer ratio to transform the voltage sensibility into current sensibility. For instance, the ratio of
