Can someone post the procedure for setting up and calibrating/checking your gauges...I am not sure my gauges are accurate or set up properly
Good gauges have an easy to adjust zero, but to really test them, need NTIS certified standard gauges to compare your reading against. For the most part, have to take the word of your gauge manufacturer.
You can check the vacuum section of your low side gauge yourself, get a piece of clear tubing 30' long and bend in into a U to make a manometer, fill it midway with water. 20"/Hg vacuum should cause a water displacement of 135.7". Pressures are a lot more complicated, won't get into that. There are labs that do this, but the price is extremely high. Really don' hear much about gauge accuracy.
I do have a set of standard gauges, those cheap plastic ones with those DIY charging kits with the sealer included are really a bad joke, with precisely 30 psi applied, indicated about 18 psi the best I could read it. Not only want to damage your system, but blow it up as well. Harbor Freight was almost just as bad. Mastercool gauges I tested were pretty close, but wonder why they and others never specify the accuracy.
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