How to check the vacuum correctly

[EliotBR (Eliot)]

I’ve brought up your questions internally and been told the following:

1. The cables going into an enclosure (from accessories and tether) will generally allow some amount of air into the system during a vacuum test, which is why we have a 10-15 minute time recommendation for the test
   • This should only be noticeable if there are actually cables going in, so shouldn’t be the case for a sealed enclosure with a single entry point
2. If you’re concerned about a particular part of the system you can try to test it in isolation, and add components from there until you can replicate the leak (if there is one)
   • For example, to determine whether the pump is leaking you can stopper it directly and see whether it maintains the pressure