PAT is Portable Appliance Test. if it's not portable a visual will do. The trick is to do a risk assessment so you can prove you looked at the problem.
Is anyone using ExGarde Pro 4.5.2?
I've got three IP Node Port windows that I didn't have before. If I close them I loose comms' off-and-on-again doesn't help.
I use a Pi to display the output from my solar panels. I installed Team Viewer on it so I can remote in from my office, and a timer ti turn the screen off at night. It worked out really well.