Oscilloscope Ground Clip Safety When Measuring Circuits with Isolation Transformer

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#1 21670273 31 Oct 2013 08:50

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Anonymous

Post #1
21670273 31 Oct 2013 08:50

When using an isolation transformer with your circuit and you make measurements of different electronic components, can you connect oscilloscope ground anywhere on the line? And if not, why?
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#2 21670274 01 Nov 2013 08:31

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Anonymous

Post #2
21670274 01 Nov 2013 08:31

A 50-60 Hz isolation transformer exhibits a capacitance of at least 100 pF from the oscilloscope common to earth ground. This capacitance can alter the operation of sensitive circuit nodes and nodes with high dV/dt. The common is usually connected only to a low impedance node having a low dV/dt.
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