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NORMA 6003/NORMA 6003+/NORMA 6004/NORMA 6004+
Users Manual
82
Figure A4. Effects of Leakage Current on Current Measurement
Methods to Reduce the Effect of Leakage Capacitance
1. High frequency components more easily generate current on the leakage capacitance than low
frequency components. When measuring the small current with the built-in current channel, if you
do not pay attention to the high-frequency components of the current, it is recommended to turn on
the 650Hz line filter to effectively reduce the effect of leakage capacitance.
2. Connecting the built-in current channel to terminal N or ground can effectively reduce the effect of
leakage capacitance.
3. Disconnecting the power adapter and using battery only can reduce the effect of leakage
capacitance.
4. When measuring voltage, if the 2 terminals of the voltage source under measurement do not have
the same impedance to the ground, it is recommended to connect the black terminal to the terminal
with lower impedance (to avoid leakage current flowing through the internal resistance of the
voltage source under measurement).
Broadband Measurement
The Analyzer has a bandwidth of up to 500 kHz and a sample rate of 200 kHz. When the measurement
bandwidth is greater than half of the sample rate, aliasing may be caused, the observed waveform is
not the real waveform, and the measured frequency is not the real frequency.
To measure a time-based digital quantity, such as RMS, AC and DC components, the results of the
measurement after aliasing are still accurate. However, note that if the signal frequency is close to or
equal to the sample frequency and its multiples, the measurement results are probably invalid.
If the signal under measurement has a frequency component higher than 100 kHz, and it is not desired
to be measured under aliasing, the line filter of the corresponding channel can be turned on according
to the required bandwidth.
Rs+
Rs-
Rshunt
0.01 Ohm
I
Cs
Ics
∆I= Ics[(Rshunt + Rs-)/Rshunt]
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