2600AS-901-01 Rev. B / September 2008 Return to Section Topics 20-15
Series 2600A System SourceMeter® Instruments Reference Manual Section 20: Calibration
Step 3. Current Calibration
Models 2601A/2602A/2611A/2612A:
1. Connect the Series 2600A to the digital multimeter (see Figure 20-2), and select the
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 Table 20-2 (Model 2601A/2602A), Table 20-3 (Model
2611A/2612A), or (Model 2635A/2636A):
a. 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
b. Select the correct sense mode based on the calibration step from Table 20-2, Table 20-
3, or , for example:
smua.sense = smua.SENSE_LOCAL
c. Select positive polarity, then set the source output to the positive zero value:
smua.cal.polarity = smua.CAL_POSITIVE
smua.source.leveli = 1e-10
d. Turn on the output:
smua.source.output = smua.OUTPUT_ON
e. Allow the readings to settle, then get both the multimeter and Series 2600A current read-
ings at the positive zero value (the Series 2600A measurement is not necessary if this cal-
ibration 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 2600A:
Z_rdg = smua.measure.i()
f. Turn off the output:
smua.source.output = smua.OUTPUT_OFF
g. Set the source output to the positive full-scale value for the present range, for example:
smua.source.leveli = 0.9
h. Turn on the output:
smua.source.output = smua.OUTPUT_ON
i. Allow the readings to settle, then get both the multimeter and Series 2600A voltage read-
ings at the positive full-scale output value (the Series 2600A measurement is not neces-
sary 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 2600A:
FS_rdg = smua.measure.i()
j. Turn off the output:
smua.source.output = smua.OUTPUT_OFF
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