Sourcing Current - Keithley 6220 Reference Manual

3-14 DC Current Source Operation
When finished using the preset value, press PRES again to disable the feature.
The "PRES" message will cancel, and the unit will return to the original source
value. Note that the compliance value cannot be preset.
NOTE

Sourcing current

To source current, (1) connect the test circuit (DUT) to the output, (2) set the
source range output value and compliance, (3) enable the output filter (if desired),
and finally, (4) turn the output on.
1.
(2).
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Source preset values are not saved as part of a
user setup.
Connect test circuit (DUT) to Model 622x output
WARNING Before making or breaking connections, the Model 622x
must be turned off and the power cord must be discon-
nected from the AC outlet. Also, power must be removed
from all external test circuits and instrumentation.
Connection information is provided in
are two basic output triax connector configurations that can be selected:
• Inner shield connected to Output Low – Cable Guard is not available.
• Inner shield connected to Cable Guard with Output Low connected
to the outer shield (Earth Ground) of the triax connector.
Set the source and compliance values
• Figure 3-3 explains how to set the source and compliance values for
the Model 6220.
• Figure 3-4 explains how to set the source and compliance values for
the Model 6221.
While in the edit mode, AUTO range can be used, but range changes will
not occur during the editing process.
After setting the I-source value for a fixed range, enabling AUTO range will
select the optimum (lowest) range for the source value.
Remote programming – Autorange can be used when setting the I-source
value. With autorange enabled, the Model 622x will automatically select the
optimum (lowest) range to accommodate the source value.
The commands to select the source range, and set the output and
compliance values are provided in
demonstrate proper syntax.
Return to
Model 6220/6221 Reference Manual
Section 2. Keep in mind that there
Table 3-2. The following examples
Section 3 topics