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4.9 Open Circuit Compensation and Short Circuit Compensation
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NOTE
The determination of test range is performed according to the measured
value Zm for impedance. Therefore it may happen that testing cannot be
performed, when HOLD is on, if the test range is determined merely
according to the value of impedance of the sample under test. In this case,
you should set the test range in consideration both of the impedance of the
test sample and also of the residual impedance components of the test
fixture.
Deviations in the measured values can become comparatively large in
the following cases:
If only short circuit compensation has been performed.
With short circuit compensation only having been performed, since no
compensation can be performed in terms of the open circuit residual
component Yo (which is not available), thereby deviation in the resultant
values will become large if the value of that open circuit residual component
Yo is relatively large.
If only open circuit compensation has been performed.
With open circuit compensation only having been performed, since no
compensation can be performed in terms of the short circuit residual
component Zs (which is not available), thereby deviation in the resultant
values will become large if the value of that short circuit residual component
Zs is relatively large.
In order to avoid this sort of thing, be sure always to perform both short
circuit compensation and also open circuit compensation.
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