Surge Guard w/ ? Power pedestal - how do you handle this?

I always trust my EMS PT50. If it does show a problem, I pull my spare PT 50 out and if it agrees with the first one (yes, both are portables) I call the CG. If they don't believe there is a problem, can't move me, or won't otherwise fix it - This is why I'm on wheels. Out the gate I go. If they don't voluntarily give me a refund I just do a charge back on my credit card which I have only had to do once.