Okay. I think I’m good!
Found this: As a general “Rule of Thumb”, for every 1000 feet above sea level, the maximum possible vacuum is reduced by approximately one in-Hg (0.491 psi). By using this rule one can quickly determine the maximum possible vacuum for the area.
According to Vacmaster the maximum vacuum that can be achieved in Los Angeles at sea level is 29.92 in-Hg. Using the rule of thumb, I subtracted 3.5 (round altitude to 3500ft) and got 26.42. Punched that into a google conversion calculator and got 0.089468389 MPa, which is pretty much what my gauge reads.
Now I don’t fully understand everything that I did , so if anyone with a better grasp of the science could confirm (or not confirm) my calculations, that would be great. Just want to make sure I’m getting maximum function out of my
machine.