As mentioned, my Norskog digital gauge and my Jeg's mechanical gauge disagree on pressure readings. They are about 6 psi different. Has anyone ever had this problem? I notice on the mechanical gauge, there is a tiny set screw in the port. Is this used to calibrate the gauge? I plan on getting a hold of a third gauge to see which one is most accurate and then try to recalibrate. Any comments or suggestions? Thanks!

 

I'd say trying a brand new mechanical guage and comparing would be your best shot, although the norskog gauges are supposed to be realy good quality, i'd be suprised if it was wrong...how old and what make is your mechanical gauge that you have now?

 

I plan on borrowing my shop's professional gauge (huge face) as a reference... I know it's accurate. The mechanical gauge I'm using is made by Jegs. The Jeg's gauge is about 2 years old. It isnt damaged in any way. The Norskog gauge is 6 psi lower and the difference is linear. Anyone know if the little set screw is the calibration device?

 

Ive never heard of them being adjustable, only way to find out would be to play with that screw a little with the gauge hooked up and see if it changes anything....

 

Thanks.. Ya, me neither. That's the plan.