HP 8712C User Manual page 267

Accuracy
Step 3: Verify
Performance
measurements. lb check the accuracy that can be obtained using the new
device must not be one of the calibration standards: measurement of one of
these standards is merely a measure of repeatability.
The published specikations for your analyzer system include accuracy
C A U T I O N
enhancement with compatible calibration kits. Measurement calibrations
made with user-dehned or modified calibration kits are not subject to those
Calibrating for Increased Measurement
Choose an Appropriate Calibration Method
Once a measurement calibration has been generated with a user-defined
calibration kit, its performance should be checked before making device
calibration kit, a device with a well-defined frequency response (preferably
'lb achieve more complete verifkation of a particular measurement
calibration, accurately known verification standards with a diverse magnitude
and phase response should be used. NBS traceable or HP standards are
recommended to achieve verihable measurement accuracy.
analyzer speciEcations.
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