Keithley 2651A Reference Manual page 718

Appendix B: Calibration
Recommended calibration equipment
The table below contains the recommended equipment for the calibration procedures. You can use
alternate equipment as long as that equipment has specifications equal to or greater than those listed
in the table. When possible, test equipment specifications should be at least four times better than
corresponding Model 2651A specifications.
Description
Digital multimeter
Precision resistor: 0.1 Ω, 250 W, 0.1% Isotek
50 Ω resistors (2)
* Resistor used to test 1 A, 5 A, 10 A, and 20 A ranges. Before use, characterize the resistor to the uncertainty shown.
** Used for contact check calibration. Before use, characterize with the resistance function of the digital multimeter.
B-18
Model 2651A High Power System SourceMeter® Instrument Reference Manual
Manufacturer/model Accuracy
DC voltage
DC current
DC current
Pulse only
Resistance*
RUG-Z-R100-0.1-TK1
Any suitable.**
50 mV: ±1500 ppm
90 mV: ±880 ppm
0.5 V: ±200 ppm
0.9 V: ±130 ppm
5 V: ±200 ppm
9 V: ±130 ppm
10 V: ±170 ppm
18 V: ±110 ppm
20 V: ±200 ppm
36 V: ±130 ppm
50 nA: ±2700 ppm
90 nA: ±1500 ppm
500 nA: ±1200 ppm
900 nA: ±750 ppm
5 μA: ±600 ppm
9 μA: ±420 ppm
50 μA: ±170 ppm
90 μA: ±110 ppm
0.5 mA: ±150 ppm
0.9 mA: ±100 ppm
5 mA: ±170 ppm
9 mA: ±110 ppm
50 mA: ±150 ppm
90 mA: ±100 ppm
500 mA: ±1600 ppm
900 mA: ±950 ppm
2.5 A: ±420 ppm
4.5 A: ±290 ppm
5 A: ±600 ppm
9 A: ±460 ppm
10 A: ±400 ppm
18 A: ±310 ppm
20 A: ±750 ppm
45 A: ±620 ppm
0.1 Ω: ±75 ppm
2651A-901-01 Rev. A / March 2011