boost gauge

[Eddie]

I was wondering if anyone can inform me about what readings I should be seeing using this gauge. bought these as a set and have no idea what I am looking for normaly on the boost gauge.
My gauge reads in IN-Hg vac can anyone tell me what would be a normalish reading, I have tried ot figure out the in-hg to bar conversion but it just confused me:(

Should I be seeing a -0 reading on idle and then +0 on accelaration?

Please anyone any idea\'s

Pic attached of the gauge to give an idea.

Thanks in advance

[strange_days_uk]

-20 about right at idle.

On boost you see around 10 psi, then dips to 8 as the 2nd tub comes in, then 10 again up to redline ish.

15 is 1 bar.

[Mave]

That gauge is showing vaccum units in in-Hg, then boost units of psi as far as I can see.