Keysight E4980A User Manual page 207

Measurement Procedure and Examples
Correction Functions
Preparing the Standard
It is necessary to prepare a working standard, such as a standard resistor or
standard capacitor. Try to select a standard whose impedance is as close as
possible to the impedance of the DUT. Consider the following
recommendations for selecting standards.
• For capacitance measurements:
A standard capacitor whose capacitance is nearly equal to the capacitance
of the DUT is recommended.
• For resistance measurements:
A standard resistor whose resistance is nearly equal to the resistance of the
DUT is recommended.
• For inductance measurements:
A standard inductor whose inductance is nearly equal to the inductance of
the DUT is recommended.
Reference Values of the LOAD Standard
Enter specified reference values of the standard as the REF A and REF B values
by using the appropriate function on the CORRECTION page. For example,
when using a standard capacitor that has a specified parallel capacitance and
D values, enter the specified parallel capacitance value as the REF A value and
the specified D value as the REF B value with the Cp-D function.
If the REF A and REF B values are entered with the Cp-D function,
measurements with other functions (such as the |Z|-  function) can also
be performed.
Using the Pre-Measured Device for the LOAD
Even if you have no standard with the specified reference values, you can
perform a LOAD correction using a device such as a general purpose capacitor
or resistor. The pre-measured values of a device are used for the REF A and
REF B values. Follow the procedure shown below to use a device for the LOAD
standard.
Step 1. For the LOAD standard, prepare a device that has an impedance as close as
possible to the impedance of the DUT.
Step 2. If the device has BNC connectors structured in the four-terminal pair
configuration, measure the device directly by connecting it directly to the
E4980A/AL: Do not use a test fixture. If the device does not have
four-terminal pair measurement terminals, measure the device using a direct
coupling test fixture (such as the Keysight 16047A/C/D/E).
Step 3. On the CORRECTION page, enter the measured values obtained in step 2 as
the REF A and REF B values with the function used in step 2.
Keysight E4980A/AL Precision LCR Meter 207