A slow SPG is a bad thing?

[divad]

Very extreme example and you do have to suck it out again, that depends
how much liquid gets past the hole if any, and if you use a needle or a drill
or if you soak in a vessel or a vibrating machine with only 10mm liquid in it
soaking the threaded part only not the entire gauge although you can do it

and if you think about it, admirably as you did

and working with very hot water promotes evaporation

Do you use a rubber washer between the syringe and the orifice to maintain vacuum?

 

[Nathan Doty]

Why not concentrate efforts on preventing equipment from failing? Prevent wear, routine maintenance, & gear replacement when warranted. The risk VS reward matrix for an SPG you don't fully trust swings into the negative for me.

The industry doesn't service SPG's for a reason, we only check accuracy and call it "calibration". But it is a standard to replace when not accurate.

All equipment fails eventually. You can delay it but at some point it will fall. They're dead people all over the world with equipment that worked perfectly right up to the moment it didn't. Plan for it to fail and you'll have a better chance of living to replace it.

 

[АлександрД]

one remark...

Now let's ask a question: Does corroded metal have more or less flexibility? Less

Corroded metal became thinner. Consequently - flexibility became more flex
Corroded Bourdon pipe under high pressure will show bigger values of pressure.
... and without pressure can show over zero values.

About SPG cleaning from flooding: I had idea to clean tube with alcohol 96% inside, but... cappilary effects will not allow to fill all inner volume, and to make good mix of water inside and alcohol...
But cleaning under vacuum bell looks reasonable. Liquid should boil inside and evaporate