Calibration of Kegland Digital Pressure Gauges

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Joined
Aug 2, 2024
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Location
Northern Ireland
Hello all,

I work in calibration and my boss has allowed me to bring my equipment in to calibrate it. (traceable to a national standard)
I've got my regulator pressure gauges, both of which were adjusted, these were both waaaaaay out. The low pressure gauge was replaced and even the new gauge wasn't accurate and needed adjusted.
I'm currently calibrating my RAPT temp controller and have adjusted my controller to -5°C as Point 1 and 35°C as point 2. Currently checking set points every 10°C from -5°C to 35°C.

While I'm waiting I've opened up the Kegland Digital pressure Gauge KL18081 to see if I can adjust it for calibration and this is what I was presented with. (See attached)

At first glance, it appears that I need to short the cal point to something. I assumed the ground but may have been wrong.
My colleagues aren't 100% either as there isn't really any info on these.
So we're unsure if what happens when we do.
Does it just adjust to atmospheric?
Do I need to have to have it fully loaded?

anybody dealt with these before able to lend a hand? lol
 

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