![background image](http://html2.mh-extra.com/html/keithley/6514/6514_instruction-manual_4064199241.webp)
Performance Verification
18-7
Calibrator voltage calculations
When verifying the 20pA-2
µ
A current ranges and all charge ranges, you must calculate the
actual calibrator voltages from the desired current or charge values and the characterized Model
5156 Calibration Standard resistor and capacitor values.
Current calculations
Calibrator voltages required for verification currents are calculated as follows:
V = IR
Where: V = required calibrator voltage
I = verification current
R = actual standard resistor value
For example, assume you are calibrating the 20pA range using an actual 100.5G
Ω
standard
resistor value. The actual calibrator voltage is: 20pA
×
100.5G
Ω
= 2.01V.
Charge calculations
Calibrator voltages for verification charge values are calculated as follows:
V = Q/C
Where: V = required calibrator voltage
Q = verification current
C = actual standard resistor value
For example, the required calibrator voltage for a 200nC range verification charge value with
a 99.5nF standard capacitance value is: 200nC/99.5nF = 2.01005V.
Summary of Contents for 6514
Page 203: ...14 CommonCommands...
Page 207: ...15 SCPISignalOriented MeasurementCommands...
Page 235: ...18 PerformanceVerification...
Page 254: ...19 Calibration...
Page 274: ...20 RoutineMaintenance...
Page 278: ...A Specifications...
Page 282: ...B StatusandErrorMessages...
Page 288: ...C GeneralMeasurement Considerations...
Page 294: ...D DDCEmulationCommands...
Page 299: ...E ExamplePrograms...
Page 306: ...F IEEE 488BusOverview...
Page 320: ...G IEEE 488andSCPI ConformanceInformation...
Page 324: ...H CalibrationOptions...