boost gauge calibration??

[Beanokid69]

i just recieved a boost gauge from a friend and the faceplate is fallen off my question is with the gauge sitting in my room where should the needle be sitting? im thinking 0 yes?

 

[98RedGs]

i just recieved a boost gauge from a friend and the faceplate is fallen off my question is with the gauge sitting in my room where should the needle be sitting? im thinking 0 yes?

Yes it should be sitting on 0.