At times when a power failure occurs and you need to perform some critical action a Uninteruptable Power Supply(UPS) is added to the test station.
This may be to put the test station in a safe mode( removing excitation or setting excitation to safe values, logging of last data and closing file handles, terminating the application.)
Things to check
- Wattage that needs to be backup.
- Time Duration required to place your system into safe mode.
- Time Duration UPS will provide.
- Number of outlet.
- Size /mountable hardware
- Some form of indication by UPS or other means that it detect a power loss(so the test station can respond to condition).
Some requirement can not have any interruption of power for the complete system(This can be a very BIG UPS) it all depends on the requirement of your project.