App-3
IM WT310-02EN
Appendix
Appendix 1 How to Make Accurate Measurements
Because the WT310/WT310HC/WT330 measures high frequencies, the effects of i
C
s cannot be
ignored.
If you connect the WT310/WT310HC/WT330 current input terminal to the side of the power supply
(SOURCE) that is close to its earth potential, the WT310/WT310HC/WT330 current measurement
circuit positive and negative terminals are close to the earth potential, so V
C
s becomes approximately
zero and very little i
C
s flows. This reduces the effect on measurement accuracy.
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