Appendix B: Calibration
2606B System SourceMeter® Instrument Reference Manual
B-8
2606B-901-01 Rev. B / May 2018
5. Verify measure current accuracy for each of the currents listed using the values listed in the
following table for your model number. For each measurement:
Select the correct source range.
Set the 2606B output current so 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 2606B current reading is within the limits given in the table below.
6. 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
90.000 nA
89.855 nA to 90.145 nA
1 µA
0.9000 µA
0.89928 µA to 0.90073 µA
10 µA
9.0000 µA
8.9963 µA to 9.0038 µA
100 µA
90.000 µA
89.957 µA to 90.043 µA
1 mA
0.9000 mA
0.89962 mA to 0.90038 mA
10 mA
9.0000 mA
8.9957 mA to 9.0043 mA
100 mA
90.000 mA
89.962 mA to 90.038 mA
1 A
0.90000 A
0.89823 A to 0.90177 A
3 A
2.4000 A
2.3953 A to 2.4047 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 limit calculations
7. Turn the output off and change connections as shown adding the 0.5
Ω 250 W resistor (see the
figure titled "Connections for 3 A current range" in
(on page B-6)).
8. Select the DMM volts function.
Repeat steps 4 through 6 for the 3 A range. Calculate the current from the DMM voltage reading
and characterized 0.5
Ω resistance value.
9. Repeat the above procedure for the other channel.