Smu.interlock.tripped; Smu.measure.autorange - Keithley 2450 Reference Manual

Section 8: TSP command reference

smu.interlock.tripped

This attribute indicates that the interlock has been tripped.
Type TSP-Link accessible
Attribute (R) Yes
Usage
interlockStatus = smu.interlock.tripped
interlockStatus
Details
This command gives you the status of the interlock. When the safety interlock signal is asserted, all voltage
ranges of the instrument are available. However, when the safety interlock signal is not asserted, the 200 V
range is disabled, limiting the nominal output to ±37 V.
When the interlock is not asserted:
•
The front-panel INTERLOCK indicator is on.
•
High voltage ranges are disabled.
•
An event message is generated when you attempt to turn on the source with a voltage higher
than ±20 V.
Example
print(smu.interlock.tripped)
Also see
None

smu.measure.autorange

This attribute determines if the measurement range is set manually or automatically for the selected measurement
function.
Type TSP-Link accessible
Attribute (RW) Yes
Usage
autoRange = smu.measure.autorange
smu.measure.autorange = autoRange
autoRange
8-86
Model 2450 Interactive SourceMeter® Instrument Reference Manual
Affected by
Not applicable
The status of the interlock:
smu.OFF: The interlock is not asserted and the 200 V range is disabled;
•
lower voltage ranges are available
smu.ON: The interlock signal is asserted and all voltage ranges are available
•
If the interlock is not asserted, returns smu.OFF.
If the interlock is asserted, returns smu.ON.
Affected by
Restore configuration
Instrument reset
Power cycle
Measure configuration list
Function change
Set the measurement range manually: smu.OFF
Set the measurement range automatically: smu.ON
Where saved Default value
Not applicable Not applicable
Where saved Default value
Configuration script smu.ON
Measure configuration list
2450-901-01 Rev. B/September 2013