Shenzhen Zhiyong Electronics Co., Ltd
8. The method to deal with abnormal situation
Can’t measure DC, or the value
obtained is comparatively low
in the frequency range
Oscilloscope set to AC coupling
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 Do CP8000 series fit the oscilloscope of any brand?
A: CP8000 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 CP8000 series product measure small current?
A: Yes. For now, the CP8000 series current probe has two optional ranges, and one is for small current.
The current resolution of the CP8030B/CP8030H 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 Any more tips?
A:
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)
Make sure the probe is locked during testing.
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