Calibrating pressure gauges - GIF

Calibrating pressure gauges.

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Previously:

https://www.homemadetools.net/forum/...271#post169245
https://www.homemadetools.net/forum/...770#post198146
https://www.homemadetools.net/forum/...566#post193267
https://www.homemadetools.net/forum/...382#post192661
https://www.homemadetools.net/forum/...335#post169455

That's pretty brutal, but about right for CHEAP gauges, I wonder if they 'exercise' them first before 'calibrating' them? As a power station Instrument Technician I had to check cal/recal gauges almost daily. Though decent Budenburg gauges had screw clamped adjustable linkages, with 0.5% cal being our normal standard it could take several goes to get them right, still doing comparator calibration checks in the current job, they won't buy me a deadweight tester.