Keithley 6517 - Coulombs Function Calibration Commands and Parameters (Using Calibration Standard)

Calibration Command Reference
3-14
Description The :C commands calibrate the coulombs function ranges using a suitable charge source. Each
range requires four commands, corresponding to zero A, positive full range, zero B, and nega-
tive full range. For example, :CZEROA2N and :CZEROB2N calibrate 20nC range zeroes, while
:C20N and :CN20N calibrate positive 20nC full range and negative 20nC full-range values re-
spectively. Normally, 95% of full-range values are used (for example, 19nC). Commands using
a charge source to calibrate all ranges are summarized in Table 3-5.
The :C<range>CARD commands calibrate the coulombs ranges using the optional Model 5156
Electrometer Calibration Standard and a DC voltage calibrator. Commands for use with the cal-
ibration standard and DC voltage calibrator are listed in Table 3-6.
Programming Notes 1. All four commands for a given range must be used in order to properly calibrate that range.
2. Appropriate zero command must be sent before full-scale command. (A command before
positive full-scale command; B command before negative full-scale command.)
Examples :CAL:PROT:CZEROA200N Cal 200nA range zero A.
:CAL:PROT:C200N 190E-9 Cal 200nA positive 95% of full range.
:CAL:PROT:CZEROB200N Cal 200nA range zero B.
:CAL:PROT:CN200N -190E-9 Cal 200nA negative 95% of full range.
:CAL:PROT:C200NCARD 190 Cal 200nA range with cal standard.
:CAL:PROT:CN200NCARD -190 Cal 200nA range with cal standard.
Table 3-6
Coulombs function calibration commands and parameters (using calibration standard)
Range Command format* <Cal_voltage> parameter limits (V)
2nC :cal:prot:czeroa2n
:cal:prot:c2ncard <Cal_voltage>
:cal:prot:czerob2n
:cal:prot:cn2ncard <Cal_voltage>
None
0.95 to 2.05
None
-0.95 to -2.05
20nC :cal:prot:czeroa20n
:cal:prot:c20ncard <Cal_voltage>
:cal:prot:czerob20n
:cal:prot:cn20ncard <Cal_voltage>
None
9.5 to 20.5
None
-9.5 to -20.5
200nC :cal:prot:czeroa200n
:cal:prot:c200ncard <Cal_voltage>
:cal:prot:czerob200n
:cal:prot:cn200ncard <Cal_voltage>
None
95 to 205
None
-95 to -205
2µC :cal:prot:czeroa2u
:cal:prot:c2ucard <Cal_voltage>
:cal:prot:czerob2u
:cal:prot:cn2ucard <Cal_voltage>
None
9.5 to 20.5
None
-9.5 to -20.5
* Command short form shown.
NOTE: Model 5156 Electrometer Calibration Standard and DC voltage calibrator are required to use these
commands.