Tektronix Keithley 2651A Reference Manual page 849

Model 2651A High Power System SourceMeter® Instrument Reference Manual
Calibration adjustment overview
The following topics contain an overview of the entire calibration adjustment procedure.
Parameter values
The full-scale parameters are 90 percent of full-scale as indicated (see the table in
page 12-19)). Note that you cannot send a value of 0 for the two zero parameters. Instead, you must
send a very small value, such as 1e-30 or -1e-30.
Sense modes
The table titled "Model 2651A calibration steps" in
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.
Step sequence
Adjustment steps must be performed in a specific sequence. See the table titled "Model 2651A
adjustment steps." Note that all steps are performed using 2-wire (local sensing) except as noted.
Adjustment of each range is performed as a four-point adjustment:
+ ZERO
▪
+ FULL SCALE
▪
− ZERO
▪
− FULL SCALE
▪
Before performing the adjustment steps, refer to
modes (on page 12-19).
2651A-901-01 Rev. C October 2021
Step sequence (on page 12-19) lists the sense
Parameter values (on page 12-19) and
Section 12: Calibration
Step sequence (on
Sense
12-19