Appendix B: Calibration
Series 2600B System SourceMeter® Instrument Reference Manual
B-8
2600BS-901-01 Rev. B / May 2013
Model 2611B/2612B/2614B output current accuracy limits
Source range
Output current setting
Output current limits
(1 year, 18 °C to 28 °C)
100 nA
1
µ
A
10
µ
A
100
µ
A
1 mA
10 mA
100 mA
1 A
90.000 nA
0.90000
µ
A
9.0000
µ
A
90.000
µ
A
0.90000 mA
9.0000 mA
90.000 mA
0.90000 A
89.846 nA to 90.154 nA
0.89893
µ
A to 0.90107
µ
A
8.9923
µ
A to 9.0077
µ
A
89.913
µ
A to 90.087
µ
A
0.89943 mA to 0.90057mA
8.9913 mA to 9.0087 mA
89.943 mA to 90.057mA
0.89775 A to 0.90225 A
1.5 A
1.35000 A
1.34519 A to 1.35481 A
Model 2634B/2635B/2636B output current accuracy limits
Source range
Output current setting
Output current limits
(1 year 18 °C to 28 °C)
1 nA
10 nA
100 nA
0.90000 nA
9.0000 nA
90.000 nA
0.89665 nA to 0.90335 nA
8.9815 nA to 9.0185 nA
89.896 nA to 90.014 nA
1
µ
A
10
µ
A
100
µ
A
1 mA
10 mA
100 mA
1 A
0.90000
µ
A
9.0000
µ
A
90.000
µ
A
0.90000 mA
9.0000 mA
90.000 mA
0.90000 A
0.89903
µ
A to 0.90097
µ
A
8.9923
µ
A to 9.0077
µ
A
89.913
µ
A to 90.087
µ
A
0.89943 mA to 0.90057 mA
8.9913 mA to 9.0087 mA
89.943 mA to 90.057 mA
0.89775 A to 0.90225 A
1.5 A
1.35000 A
1.34519 A to 1.35481 A
1. Repeat the procedure for negative output currents with the same magnitudes as those listed.
2. Turn the output off, and change connections as shown in the figure titled "Connections for 1.5 A
and 3 A current ranges" in
Current source accuracy
(on page B-7).
3. Select the DMM DC volts function.
4. Repeat steps 4 through 6 for the 3 A range (Model 2601B/2602B/2604B) or the 1.5 A range
(Model 2611B/2612B/2614B/2634B/2635B/2636B). Calculate the current from the DMM voltage
reading and the characterized 0.5
Ω
resistance value:
I=V/R.
5. For the Model 2602B/2604B/2612B/2614B/2634B/2636B, repeat the above procedure for the
other channel.
Model 2634B/2635B/2636B current source accuracy 1 nA to 100 nA ranges
A suitably guarded and characterized 1 G
Ω
resistance standard, such as the Keithley Instruments
Model 2600-STD-RES is necessary for the following measurements. Step-by-step procedures and
connection diagrams for verifying the output current accuracy for the low current ranges are included
with the Model 2600-STD-RES. The general process entails (for each current range) measuring the
voltage across the characterized 1 G
Ω
resistor for a given output current and comparing the derived
current to the current accuracy listed in the table titled "Model 2634B/2635B/2636B output current
accuracy limits."
Connect the guarded resistance standard to the Model 2634B/2635B/2636B and the DMM.
1. Source the appropriate current for +/- full-scale reading.
2. Wait 30 seconds for stable measurement.
Summary of Contents for System SourceMeter 2601B
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