Keithley 4200A-SCS Reference Manual page 1178

Model 4200A-SCS Parameter Analyzer Reference Manual
Details
The DisplayCableCompCaps82 user module reads the nominal cable compensation values that
are stored in the compensation file and returns them to the calling function. In the case of Clarius, it
returns the values to the UTM data sheet.
The default parameters for this user module are shown in the following figure. Line 1 specifies the file
directory path where the capacitance values are saved. This file directory path must be the same as
the one used by the SaveCableCompCaps82 user module.
To prevent unpredictable results, the array size values for the RangeSize, Values100kSize, and
Values1MSize arrays must be set to 8.
For details on the procedure to perform cable compensation, refer to
page D-9).
The returned arrays are arranged in the order shown in the following table.
Reading_rate valid inputs
Range
2E-12
2E-12
20E-12
20E-12
200E-12
200E-12
2E-9
2E-9
If CabCompFile does not exist, or if there is no path specified (null string), the default compensation
parameters are used. When entering the path, be sure to use two \ characters to separate each
directory. For example, if your cable file is in:
C:\calfiles\82cal.dat
You would enter:
C:\\calfiles\\82cal.dat
4200A-901-01 Rev. C / February 2017
Figure 606: DisplayCableCompCaps82 user module
100 kHz values 1 MHz values
2 pF low comp value 2 pF low comp value
2 pF high comp value 2 pF high comp value
20 pF low comp value 20 pF low comp value
20 pF high comp value 20 pF high comp value
200 pF low comp value 200 pF low comp value
200 pF high comp 200 pF high comp value
value
2 nF low comp value 2 nF low comp value
2 nF high comp value 2 nF high comp value
Appendix D: Using a Model 82 C-V System
Cable compensation tests (on
D-37