just got it this week and man is it great.
Used it a few times on a couple recovery jugs. With a old vacuum pump that was so called "bad".

Pulled a 100lb cylinder down to 80 and it only rose to 150 in 10 mins. will pull down just a brass coupler from trutech down below 100 in 20 seconds and 2 mins maybe less to below 20.

But now it is reading 0 microns at atm pressure.
Changed the battery and still doing it.
Any idea why and how to resolve problem?