High Voltage SourceMeter Instrument Reference Manual Section 14: TSP comm
2470-901-01 Rev. A / May 2019 14-109
smu.interlock.tripped
This attribute indicates that the interlock has been tripped.
Type TSP-Link accessible Affected by Where saved Default value
Usage
interlockStatus = smu.interlock.tripped
The status of the interlock:
 smu.OFF: The interlock is not asserted and the 200 V and 1000 V range is
limited; lower voltage ranges are available

: The interlock signal is asserted and all voltage ranges are available
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 and 1000 V ranges are hardware limited to a nominal output of less than ±42 V.
When the interlock is not asserted:
• The front-panel INTERLOCK indicator is off.
• High voltage ranges are disabled.
• If you attempt to turn on the source with a voltage more than ±21 V, an event message is
generated.
Example
print(smu.interlock.tripped)
If the interlock is not asserted, returns smu.OFF.
If the interlock is asserted, returns
.
Also see
None
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