Keithley 2651A Reference Manual

Appendix B: Calibration Model 2651A High Power System SourceMeter® Instrument Reference Manual
B-6 2651A-901-01 Rev. A / March 2011
Setting the measurement range
When simultaneously sourcing and measuring either voltage or current, the measure range is coupled
to the source range, and you cannot independently control the measure range. Thus, it is not
necessary for you to set the range when testing voltage or current measurement accuracy.
Current source accuracy
Follow the steps below to verify that the Model 2651A output current accuracy is within specified
limits.
1. With the power off, connect the digital multimeter to the Model 2651A output terminals, as shown
in Connections for current verification (100 mA range and below)
(on page B-7).
2. Select the multimeter DC current measuring function.
3. Press the SRC key to source current, and make sure the source output is turned on.
4. Verify output current accuracy for each of the currents for the 100 nA through 100 mA ranges
using the values listed in the following table. For each test point:
• Select the correct source range.
• Set the Model 2651A output current to the correct value.
• Verify that the multimeter reading is within the limits given in the table below.
Output current accuracy limits
Source range Output current setting
1
Output current limits
(1 year, 18° C to 28° C)
100 nA 50.000 nA 49.450 nA to 50.550 nA
90.000 nA 89.410 nA to 90.590 nA
1 μA
500.00 nA 497.50 nA to 502.50 nA
900.00 nA 897.10 nA to 902.90 nA
10 μA 5.0000 μA 4.9850 μA to 5.0150 μA
9.0000 μA 8.9810 μA to 9.0190 μA
100 μA 50.000 μA 49.925 μA to 50.075 μA
90.000 μA 89.913 μA to 90.087 μA
1 mA 0.50000 mA 0.49955 mA to 0.50045 mA
0.90000 mA 0.89943 mA to 0.90057 mA
10 mA 5.0000 mA 4.9905 mA to 5.0095 mA
9.0000 mA 8.9893 mA to 9.0107 mA
100 mA 50.000 mA 49.955 mA to 50.045 mA
90.000 mA 89.943 mA to 90.057 mA
1 A 500.00 mA 496.10 mA to 503.90 mA
900.00 mA 895.78 mA to 904.22 mA
5 A 2.50000 A 2.4945 A to 2.5055 A
4.50000 A 4.4929 A to 4.5071 A
10 A 5.00000 A 4.9865 A to 5.0135 A
9.00000 A 8.9805 A to 9.0195 A

Keithley 2651A Specifications

General

Brand	Keithley
Model	2651A
Category	Measuring Instruments
Language	English