Remote Rel Programming - Keithley 2651A Reference Manual

Section 3: Functions and features
Defining a rel value
A unique rel value can be established for the selected measurement function.
To establish a unique rel value from the front panel:
1. Press the CONFIG key and then the REL key.
2. Select the measurement function (CURRENT, VOLTAGE, OHMS, or WATTS), and then press
ENTER or the navigation wheel
3. Set the desired rel value.
4. With the desired rel value displayed, press the ENTER key or the navigation wheel
press the EXIT (LOCAL) key to back out of the menu structure.

Remote rel programming

Rel commands
Rel commands are summarized in the following table.
Rel commands
Command
To set rel values:
smua.measure.rel.leveli = relval
smua.measure.rel.levelp = relval
smua.measure.rel.levelr = relval
smua.measure.rel.levelv = relval
To enable/disable rel:
smua.measure.rel.enablei = smua.REL_OFF
smua.measure.rel.enablep = smua.REL_OFF
smua.measure.rel.enabler = smua.REL_OFF
smua.measure.rel.enablev = smua.REL_OFF
smua.measure.rel.enablei = smua.REL_ON
smua.measure.rel.enablep = smua.REL_ON
smua.measure.rel.enabler = smua.REL_ON
smua.measure.rel.enablev = smua.REL_ON
Rel programming example
The programming example below illustrates how to set and enable current rel to 100 mA:
-- Set current rel to 100 mA.
smua.measure.rel.leveli = 0.1
-- Enable current rel.
smua.measure.rel.enablei = smua.REL_ON
3-2
Model 2651A High Power System SourceMeter® Instrument Reference Manual
. The present rel value is displayed.
Description
Set current rel value.
Set power rel value.
Set resistance rel value.
Set voltage rel value.
Disable current rel.
Disable power rel.
Disable resistance rel.
Disable voltage rel.
Enable current rel.
Enable power rel.
Enable resistance rel.
Enable voltage rel.
2651A-901-01 Rev. A / March 2011
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