I've used one of these a few years ago, it was a company tool. It worked well, connect it up, evacuate, and in an hour or so it would be down to 500 +/-.
I've been using a Supco for the past year, company tool. I liked the fieldpiece better so I bought one.
This new one just doesn't seem right.
It will pull down fairly quick to 700 or so then rise up around 1100 and stay there forever. What I really don't understand is why the vacuum lowers when I add gas, as shown in the video.
I install the gauge inline with the suction hose. This manifold set is fairly new, no low loss hoses or anything.
I also have a picture of it reading stable at 950 with nothing connected to it.
Seems like a defective gauge or an I missing something?