2606B System SourceMeter® Instrument Reference Manual
Appendix B: Calibration
2606B-901-01 Rev. B / May 2018
B-13
0.5 Ω, 250 W, 0.1%
Precision Resistor
Isotek
RUG-Z-R500-0.1-TK3
Resistance
3
0.5 Ω:
±125 ppm
50 Ω Resistors (2)
Any suitable
4
1 GΩ, 200 V, 1%
standard
Keithley Instruments
Model 2600-STD-RES
Resistance
5
1 GΩ:
±250 ppm
1
90-day specifications show full-range accuracy of recommended model used for specified calibration point.
2
Id.
3
Resistor used to calibrate 3 A ranges should be characterized to uncertainty shown using resistance function
of a digital multimeter before use.
4
Used for contact check calibration. Characterize resistors using ohms function of digital multimeter before
use.
5
Standard is a guarded and characterized 1 G
Ω resistor that is used to test the 100 nA current range.
Calibration adjustment overview
The following topics contain an overview of the entire calibration adjustment procedure.
Parameter values
The full-scale parameters are actually 90 percent of full-scale as indicated (see the table contained in
(on page B-14)). Note that you cannot send a value of exactly 0 for the two zero
parameters. Instead, you must send a very small value, such as 1e-30 or -1e-30.
Sense modes
The preceding table for your specific model 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 100 mV
source and measure range is also calibrated using the REMOTE sense mode, and the 1 V and 1 mA
source ranges are also calibrated using the CALA sense mode.