Cps micron gauge

[ChaseAir]

Using this gauge is a learning curve I take it. Today it held at 320 microns for a couple minutes. How long should you wait? There was a leak in the flare fitting of the evaporator.

[HAP2]

I'm not too sure what you are asking... holding 320 microns. Was that the lowest reading you could achieve, or is that what it leveled out at from a lower reading? Pump isolated? The CPS seems to take a while to settle down, but it is a decent gauge. The time thing is subjective to what you feel confident with based on the system and your set-up.
Just my thoughts.
HAP

[ChaseAir]

Isolated the micron gauge with a ball valve. Gauge would not pull down below 320 microns but never ddoes. How can it hold at 320 microns and there be a leak that you can see after charging it up?

[youngtech]

pulling vacuums sucks (pun intended) too many variables

[XcelTech]

I wait 30 mins. but it could be the meter you have. I find that paying a lot for a micron gauge makes all the difference.

[Bart Vaio]

I had a supco v64 vac gauge, everything pulled down great and held. Then one day I pulled the gauge off the hoses to atmosphere and it hung at 375 micron for five minutes. The next day I ordered a BluVac, now I have to replace all my hoses, and rebuild my manifold as this thing responds so fast I see every little leak. ohh well I guess they were gettin up there anyways lol.

[dunkman]

I always pressure test with nitro to check for leaks. Then the micron gauge tells you when you're completely dehydrated. If it held good under pressure, rarely will they leak under a vac.