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16-18
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2600S-901-01 Rev. C / January 2008
Section 16: Calibration
Series 2600 System SourceMeter® Instruments Reference Manual
Models 2635 and 2636:
1. Connect the Series 2600 to the digital multimeter (see
), and select the
multimeter DC current function.
2. Calibrate the low current ranges (100pA, 1nA, 10nA, 100nA
1
)
using a suitably guarded and
characterized 1G
Ω
resistance standard, such as the Keithley Instruments Model 2600-STD-
,
"Recommended calibration equipment"
).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 2635/2636 measured results against the
standard resistance and voltage derived current.
a. Characterize the appro/- V source values with the Digital Multimeter according
.
b. Characterize the desired Model 2635/2636 current ranges.
Table 16-6
Settings of Model 2635/2636 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
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 2635/2636 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 2601/2602/2611/2612 only)
a. Short the Series 2600 sense low and output low terminals, as shown in
Also short the sense high and output high terminals together, as shown in the figure.
1.The 2601/02/11/12 could be calibrated with this method for the 100nA setting only if desired.