Model 2657A High Power System SourceMeter® Instrument Reference Manual Appendix B: Calibration
2657A-901-01 Rev. B/December 2012 B-7
1. With the power off, connect the digital multimeter to the Model 2657A as shown in the figure titled
"Connections for current verification."
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 1 nA through 120 mA ranges using
the values listed in the following table. For each test point:
• Select the correct source range.
• Set the Model 2657A 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 Output current limits
(1 year, 18 °C to 28 °C)
1 nA* 0.5000 nA 0.497499 nA to 0.502501 nA
0.9000 nA 0.897099 nA to 0.902901 nA
10 nA* 5.0000 nA 4.98999 nA to 5.01001 nA
9.0000 nA 8.98599 nA to 9.01401 nA
100 nA* 50.000 nA 49.8899 nA to 50.1101 nA
90.000 nA 89.8499 nA to 90.1501 nA
1 μA 0.50000 μA 0.499150 μA to 0.500850 μA
0.90000 μA 0.899030 μA to 0.900970 μA
10 μA 5.0000 μA 4.99350 μA to 5.00650 μA
9.0000 μA 8.99230 μA to 9.00770 μA
100 μA 50.000 μA 49.9250 μA to 50.0750 μA
90.000 μA 89.9130 μA to 90.0870 μA
1 mA 0.50000 mA 0.499550 mA to 0.500450 mA
0.90000 mA 0.899430 mA to 0.900570 mA
2 mA 1.0000 mA 0.99850 mA to 1.00150 mA
1.8000 mA 1.79826 mA to 1.80174 mA
20 mA 10. 000 mA 9.9850 mA to 10.0150 mA
18.000 mA 17.9826 mA to 18.0174 mA
120 mA 60.000 mA 59.946 mA to 60.054 mA
108.000 mA 107.932 mA to 108.068 mA
* Output current limits assume 1 V burden voltage.
5. Repeat the procedure for negative output currents with the same magnitudes as those listed.
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