Keithley 2601 Reference Manual page 460

Section 16: Calibration
Step 3. Current Calibration
Models 2601/2602/2611/2612:
1. Connect the Series 2600 to the digital multimeter (see
multimeter DC current function.
2. Send this command to initialize current calibration:
smua.source.func = smua.OUTPUT_DCAMPS
3. Perform each calibration step listed in
2611/2612), or
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
16-14
Table 16-4 (Model 2635/2636):
Select the range being calibrated with this command:
smua.source.rangei = range
(Note that it is not necessary to set the measure range for calibration.) For example, for
the 1A range, the following command would be sent:
smua.source.rangei = 1
Select the correct sense mode based on the calibration step from
3, or Table 16-4, for example:
smua.sense = smua.SENSE_LOCAL
Select positive polarity, then set the source output to the positive zero value:
smua.cal.polarity = smua.CAL_POSITIVE
smua.source.leveli = 1e-10
Turn on the output:
smua.source.output = smua.OUTPUT_ON
Allow the readings to settle, then get both the multimeter and Series 2600 current read-
ings at the positive zero value (the Series 2600 measurement is not necessary if this cali-
bration step is being done on the CALA sense mode). The two measurements should be
made as close as possible in time. Use this command for the Series 2600:
Z_rdg = smua.measure.i()
Turn off the output:
smua.source.output = smua.OUTPUT_OFF
Set the source output to the positive full scale value for the present range, for example:
smua.source.leveli = 0.9
Turn on the output:
smua.source.output = smua.OUTPUT_ON
Allow the readings to settle, then get both the multimeter and Series 2600 voltage read-
ings at the positive full-scale output value (the Series 2600 measurement is not necessary
if calibration is being done on the CALA sense mode). The two measurements should be
made as close as possible in time. Use this command for the Series 2600:
FS_rdg = smua.measure.i()
Turn off the output:
smua.source.output = smua.OUTPUT_OFF
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Series 2600 System SourceMeter® Instruments Reference Manual
Figure
Table 16-2 (Model 2601/2602),
16-2), and select the
Table 16-3 (Model
Table 16-2, Table 16-
2600S-901-01 Rev. C / January 2008