2600AS-901-01 Rev. B / September 2008 Return to Section Topics 20-19
Series 2600A System SourceMeter® Instruments Reference Manual Section 20: Calibration
Models 2635A and 2636A:
1. Connect the Series 2600A to the digital multimeter (see Figure 20-2), and select the
multimeter DC current function.
2. Calibrate the low current ranges (100pA, 1nA, 10nA, 100nA
1
)
using a suitably guarded and
characterized 1GΩ resistance standard, such as the Keithley Instruments Model 2600-STD-
RES (see
Table 20-1). Step-by-step procedures, connection diagrams, and a factory script
for calibrating the low current ranges are included with the Model 2600-STD-RES. The
general process entails forcing a characterized voltage across the 1G
Ω resistor and
comparing the 2635A/2636A measured results against the standard resistance and voltage
derived current.
a. Characterize the appropriate +/- V source values with the Digital Multimeter according
to
.
b. Characterize the desired Model 2635A/2636A current ranges.
1) Connect the guarded resistance standard.
2) Source the appropriate voltage for +/- full-scale reading.
3) Wait 30 seconds for stable measurement.
4) Capture the Model 2635A/2636A reported current measurement.
5) Initiate HI-Z mode to open the resistor standard (source zero current) and the
characterize offset.
6) Repeat the above steps for each low current range.
Step 4. Contact check calibration (For 2601A/2602A/2611A/2612A only)
a. Short the Series 2600A sense low and output low terminals, as shown in Figure 20-4.
Also short the sense high and output high terminals together, as shown in the figure.
1. The 2601A/2602A/2611A/2612A could be calibrated with this method for the 100nA setting only if desired.
Table 20-6
Settings of Model 2635A/2636A Characterization of Voltage Source
Low Current Range Voltage Source Compliance
100pA +/- 100.00mV 1.5A
1nA +/- 1.0000mV 1.5A
10nA +/- 10.000mV 1.5A
100nA +/- 100.00V 100mA
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