![background image](http://html2.mh-extra.com/html/keithley/s540/s540_administrative-manual_3932695050.webp)
Section 3: Equipment startup
S540 Power Semiconductor Test System Administrative Guide
3-8
S540-924-01 Rev. D / January 2019
If you open a cabinet door or open the DUT interlock while instruments are sourcing, the interlock
activates and disconnects the hazardous voltage from the source-measure instruments, stopping any
tests in progress.
An indicator on the front door of the S540 cabinet illuminates, and the KTE software immediately
notifies you of the interlock activation.
Figure 41: Interlock indicator
Once the interlock has been activated, you must clear the cause of the interlock activation.
To clear the interlock activation:
1.
Follow the instructions on the computer.
2.
Make sure the front and rear doors are closed.
3.
Make sure the DUT interlock is properly set for safe operation.
4.
Close the DUT safety shield.
5.
The software must recover before you can continue normal operation. You may need to rerun
your tests.