Keithley 2600a series User Manual

2600AS-901-01 Rev. B / September 2008 Return to Section Topics 22-11
Series 2600A System SourceMeter® Instruments Reference Manual Section 22: Performance Verification
Model 2635A/2636A output current accuracy 1nA to 100nA ranges
A suitably guarded and characterized 1 GΩ 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 measuring the voltage
across the characterized 1GΩ resistor for a given output current and comparing the derived
current to the current accuracy of Table 15-8 for each current range.
1. Connect the guarded resistance standard to the 2635A/2636A and the DMM.
2. Source the appropriate current for +/- full-scale reading.
3. Wait 30 seconds for stable measurement.
4. Capture the reported voltage measurement.
5. Calculate the current from measured voltage and characterized resistance.
6. Verify output current accuracy for each of the currents for the 1nA to 100nA ranges listed in
Table 22-8 (Model 2635A/2636A).

Keithley 2600a series Specifications

General

Brand	Keithley
Model	2600a series
Category	Measuring Instruments
Language	English