Model 2651A High Power System SourceMeter® Instrument Reference Manual
Appendix B: Calibration
2651A-901-01 Rev. A / March 2011
B-19
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
(on page B-19) lists
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
NOTE
Before performing the calibration steps, refer to
(on page B-19) and
(on page B-19).
