Keithley 2601B Reference Manual page 755

Series 2600B System SourceMeter® Instrument Reference Manual
Model 2611B/2612B/2614B current measurement accuracy limits
Source and measure range
100 nA
1 µA
10 µA
100 µA
1 mA
10 mA
100 mA
1 A
1.5 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
Model 2634B/2635B/2636B current measurement accuracy limits
Source and measure range
100 pA to 100 nA ranges
1 µA
10 µA
100 µA
1 mA
10 mA
100 mA
1 A
1.5 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
2. Turn the output off and change connections as shown adding the 0.5 Ω 250 W resistor (see the
figure titled "Connections for 1.5 A and 3 A current ranges" in
B-7)).
3. Select the DMM volts function.
Repeat steps 4 through 6 for the 3 A range (Model 2601B/2602B/2604B) or 1.5 A range (Model
2611B/2612B/2614B/2634B/2635B/2636B). Calculate the current from the DMM voltage reading
and characterized 0.5 Ω resistance value.
4. For the Model 2602B/2604B/2612B/2614B/2634B/2636B, repeat the above procedure for the
other channel.
2600BS-901-01 Rev. B / May 2013
1 2
Source current
90.000 nA
0.9000 µA
9.0000 µA
90.000 µA
0.9000 mA
9.0000 mA
90.000 mA
0.90000 A
1.3500 A
Measurement limit calculations
1 2
Source current
See Model 2634B/2635B/2636B current measurement accuracy
100 pA to 100 nA ranges
0.9000 µA
9.0000 µA
90.000 µA
0.9000 mA
9.0000 mA
90.000 mA
0.90000 A
1.3500 A
Measurement limit calculations
Current reading limits (1 year,
18 °C to 28 °C)
89.846 nA to 90.154 nA
0.89928 µA to 0.90073 µA
8.9963 µA to 9.0038 µA
89.957 µA to 90.043 µA
0.89962 mA to 0.90038 mA
8.9957 mA to 9.0043 mA
89.962 mA to 90.038 mA
0.89823 A to 0.90177 A
1.34583 A to 1.35418 A
(on page B-4).
Current reading limits (1 year,
18 °C to 28 °C)
(on page B-14)
0.89938 µA to 0.90063 µA
8.9963 µA to 9.0038 µA
89.957 µA to 90.043 µA
0.89962 mA to 0.90038 mA
8.9957 mA to 9.0043 mA
89.962 mA to 90.038 mA
0.89823 A to 0.90177 A
1.34583 A to 1.35418 A
(on page B-4).
Current source accuracy
Appendix B: Calibration
(on page
B-13