Tektronix Keithley 2651A Reference Manual page 47

Section 2: General operation
Setting the limit
Front-panel limit
Set the limit from the front panel as follows:
1. Press the LIMIT key to directly edit the limit value. Pressing the LIMIT key while in limit edit mode
will toggle the display between the complementary function limit and the power limit display.
2. Press the navigation wheel and set the limit to the new value.
3. Press the ENTER key or the navigation wheel to complete editing.
4. Press the EXIT (LOCAL) key to return to the normal display.
Setting the limit from a remote interface
The table below summarizes basic commands to program a limit. For a more complete description of
these commands, refer to the
Limit commands
Command
smua.source.limiti = limit
smua.source.limitv = limit
smua.source.limitp = limit
compliance = smua.source.compliance
To set the limit, send the command with the limit value as the parameter. The following programming
example illustrates how to set the current, voltage, and power limit to 50 mA, 4 V, and 1 W,
respectively:
smua.source.limiti = 50e-3
smua.source.limitv = 4
smua.source.limitp = 1
The following programming example illustrates how to print the limit state:
print(smua.source.compliance)
A returned value of true indicates one of these things:
•
If the instrument is configured as a current source, the voltage limit has been reached
•
If the instrument is configured as a voltage source, the current limit has been reached
2-22
Model 2651A High Power System SourceMeter® Instrument Reference Manual
TSP command reference
Description
Set current limit.
Set voltage limit.
Set power limit.
Test if in limit (true = in limit; false = not in limit).
(on page 7-1).
2651A-901-01 Rev. C October 2021