Calibration Overview - Keithley 2651A Reference Manual

Model 2651A High Power System SourceMeter® Instrument Reference Manual

Calibration overview

The following topics contain an overview of the entire calibration procedure.
Parameter values
The full-scale parameters are actually 90% of full-scale as indicated in the step sequence table. Note
that you cannot send a value of exactly 0 for the two zero parameters, but must instead send a very
small value, for example 1e-30 or -1e-30.
Sense modes
The table titled "Model 2651A calibration steps" in
the sense modes for the calibration steps. Note that each source and measure range is calibrated
using the LOCAL sense mode. In addition, the 1 V through 40 V ranges are calibrated using the
REMOTE sense mode, and the 1 V, 1 mA, and 5 A source ranges are calibrated using the CALA
sense mode.
Model 2651A step sequence
Calibration steps must be performed in a specific sequence. See the following table. Note that all
steps are performed using 2-wire (local sensing) except as noted. Calibration of each range is
performed as a four-point calibration:
•
+ ZERO
•
+ FULL SCALE
• - ZERO
• - FULL SCALE
Before performing the calibration steps, refer to
(on page B-19).
2651A-901-01 Rev. A / March 2011
Model 2651A step sequence
NOTE
Parameter values (on page B-19) and
Appendix B: Calibration
(on page B-19) lists
Sense modes
B-19