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UT-P4030 is 0.1V/A (30A range), and then, when the voltage sensibility of the waveform monitor
is 10mV/div, the current sensibility is 100mA/div.
8.
The method to deal with abnormal situation
Situation
Possible reason
Dealing method
Can’t measure DC, or the value
obtained is comparatively low in
the frequency range
Power is off
Turn on power
Oscilloscope set to AC coupling
Set to DC coupling
Sensor is not locked
Please lock the sensor
Auto degaussing or zero setting
unsuccessful
The probe is on the operating circuit under test
when degaussing or zero setting is applied
Turn off the circuit under
test and zero set again.
The amplitude is comparatively
low in the frequency range
The input resistance of the test equipment like
oscilloscope is 50Ω
Set the resistance over
1MΩ
9.
Q&A
9.1 Does UT-P4000 series fit the oscilloscope of any brand?
A: UT-P4000 series has standard BNC interface can be applied to the oscilloscope of any brand. It is
powered by standard adapter, independent of oscilloscope power, so it is very easy to use.
9.2 Can UT-P4000 series product measure small current?
A: Yes. For now, the UT-P4000 series current probe has two optional ranges, and one is for small
current. The current resolution of the UT-P4030(D) is 1mA. When measuring small current, please
accurately zero set and degaussing the probe, and do not change the position of the probe hand grip. To
observe the waveform please set the bandwidth restriction of the oscilloscope to 20MHz to eliminate the
interference of noise. When measuring extremely small current (a few mA for example), one could make
a few more loop of cable around the probe and divide the result with number of loop to obtain the actual
current value.
9.3 Anymore tips?
When measuring high frequency current, please do not let the current surpass the value shown by
the curve of max peak current vs frequency. The max continuous current over the curve will burn
the probe.
To measure accurately, please degauss and zero set the probe, and make sure the probe is locked
during the process.
Set the input impedance of the oscilloscope to 1MΩ(default)