12.3.2 Extended GST accuracy
The right side of this setup tab is dedicated to the Extended GST Accuracy settings.
When measuring a grounded specimen all stray capacitances between high voltage and ground enter the
measurement. Normally the influence of these stray capacitances is small. However, when measuring devices with
small capacitance (<1nF), this may induce a considerable error to the measurement. Therefore the MIDAS micro
2883 provides the possibility to measure these stray capacitances and compensate them afterwards in the
measurement of the device.
Enable the Stray Error Correction by clicking the checkbox. The values can now also be edited manually, which is
only recommended for expert users. If you want to re-evaluate the Stray Capacitance you have to uncheck the
stray error correction checkbox first and then click on the Evaluate Button as described above.
In order to measure the stray capacitances, disconnect the HV cable from the DUT, but leave it in a position which
is as similar as possible to the position when connected. Make sure the clamp is isolated from any conducting
parts. When ready press the Start Button. Press Stop to return to the setup screen.
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