Keithley 2651A Reference Manual

Model 2651A High Power System SourceMeter® Instrument Reference Manual Appendix B: Calibration
2651A-901-01 Rev. A / March 2011 B-9
4. Verify measure current accuracy for each of the currents listed in the table below for ranges
100 nA through 100 mA.. For each measurement:
• Select the correct source range.
• Set the Model 2651A output current such that the digital multimeter reading is the value indicated in the
source current column of the table below. It may not be possible to set the current source to get exactly
the required reading on the digital multimeter. Use the closest possible setting and modify the reading
limits accordingly.
• If necessary, press the TRIG key to display readings.
• Verify that the Model 2651A current reading is within the limits given in the table below.
5. Repeat the procedure for negative calibrator currents with the same magnitudes as those listed.
Current measurement accuracy limits
Source and measure range
1
Source current
2
Current reading limits (1 year,
18° C to 28° C)
100 nA 50.000 nA 49.460 nA to 50.540 nA
90.000 nA 89.428 nA to 90.572 nA
1 μA 0.5000 μA
497.60 nA to 502.40 nA
0.9000 μA
897.28 nA to 902.72 nA
10 μA 5.0000 μA 4.9880 μA to 5.0120 μA
9.0000 μA 89.848 μA to 9.0152 μA
100 μA 50.000 μA 49.965 μA to 50.035 μA
90.000 μA 89.957 μA to 90.043 μA
1 mA 0.5000 mA
499.70 μA to 500.30 μA
0.9000 mA
899.62 μA to 900.38 μA
10 mA 5.0000 mA 4.9965 mA to 5.0035 mA
9.0000 mA 8.9957 mA to 9.0043 mA
100 mA 50.000 mA 49.970 mA to 50.030 mA
90.000 mA 89.962 mA to 90.038 mA
1 A 0.50000 A 496.75 mA to 503.25 mA
0.90000 A 896.55 mA to 903.45 mA
5 A 2.5000 A 2.4958 A to 2.5043 A
4.5000 A 4.4948 A to 4.5053 A
10 A 5.0000 A 4.9880 A to 5.0120 A
9.0000 A 8.9832 A to 9.0168 A
20 A 10.0000 A 9.984 A to 10.016 A
18.0000 A 17.978 A to 18.022 A
50 A
3
20.000 A (DC level) 19.940 A to 20.060 A
45.000 A (pulse) 44.888 A to 45.113 A
1. Measure range coupled to source range when simultaneously sourcing and measuring current.
2. As measured by precision digital multimeter. Use closest possible value, and modify reading limits
accordingly if necessary. See Measurement limits calculations
(on page B-4).
3. The 20 A (DC level) source current uses the integrating ADC, while the 45 A (pulse) source current
uses the FAST ADC called form the high speed ADC pulse verification script.

Keithley 2651A Specifications

General

Brand	Keithley
Model	2651A
Category	Measuring Instruments
Language	English