Section 10: Calibrating the Model 9100: Capacitance Function
10.4-45
Final Width = 215mm
10.4.8
Capacitance Calibration
10.4.8.1
Introduction
This section is a guide to calibrating the Model 9100's Capacitance Function using its
front panel controls. The following topics are covered:
10.4.8.2
Calibration Equipment Requirements
10.4.8.3
Interconnections
10.4.8.4
Calibration Setup
10.4.8.5
Calibration of 'UUTi Low' Source Current Hardware Configuration
10.4.8.6
'UUTi Low' Source Current Hardware Configuration —
Calibration Procedure
10.4.8.7
Calibration of 'UUTi Super' Source Current Hardware Configuration
10.4.8.8
'UUTi Super' Source Current Hardware Configuration —
Calibration Procedure
Is a Local External User-Calibration Really Necessary?
It should be noted that all the hardware configurations associated with the 9100
Capacitance function are automatically calibrated whenever the Resistance function is
calibrated. If both the Capacitance and Resistance functions are being separately
calibrated against external standards, Capacitance must be calibrated after Resistance to
prevent overwriting of the Capacitance function's calibration correction factors.
Due to the cost of maintaining a suitable set of standard capacitors, (2 per 9100
capacitance span), it is not really practicable to use this technique for values above about
400
µ
F. Specially-designed equipment is used at manufacture to calibrate the 9100 before
shipment.
10.4.8.2
Calibration Equipment Requirements
A set of traceably calibrated standard capacitors at values between the minimum and
maximum calibration targets defined in Table 10.4.8.1 overleaf, and a 3-1/2 digit or better
capacitance meter (for example, a Wavetek DM97 Digital Multimeter for UUTi Low
source current, and a Wavetek DM28 Digital Multimeter for UUTi Super source current)
which is used to make transfer measurements between these standard capacitors and the
9100.
