Hioki 3532-50, Инструкция по эксплуатации

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4.9 Open Circuit Compensation and Short Circuit Compensation
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Test sample
Test fixture
Zm = Zs +
Yo +
1
1
Zx
4.9 Open Circuit Compensation and Short Circuit
Compensation
The residual impedance component of the test fixture can be considered in
terms of an equivalent circuit as shown in the figure. Further, because the
measured value Zm for impedance includes this residual component,
therefore, in order to obtain the genuine impedance value, it is necessary to
compensate the measured value in terms of the open circuit impedance
residual component and the short circuit residual component, which
accordingly must be obtained.
Zx
: true value
Rs
: residual resistance
Ls
: residual inductance
Go
: residual conductance
Co
: floating capacitance value
Zs
: short circuit residual
component
Yo
: open circuit residual component
Zm
: measured value
In this case, for the measured value Zm:
The residual components can be determined in the following manner:
Open circuit compensation
The terminals of the test fixture are left separated (open circuited). Because
the short circuit residual component Zs is now zero, therefore the open
circuit residual component Yo can be determined.
Short circuit compensation
The terminals of the test fixture are connected together (short circuited).
Because the open circuit residual component Yo is now zero, therefore the
short circuit residual component Zs can be determined.
These residual components thus obtained are recorded as compensation
values, and the compensation process may then be performed by substituting
them into the above equation.