Calibration of the gauge isn't my biggest issue here. I knew I would have to do all that initially. The calibration issue is one with the gauge itself, as the formula will yield exact values for the pressures assuming the gauge is accurate.
The reason I'm here is that I need to know how to avoid spending $400 on a used gauge controller that I have no guarantee of compatibility with my instrument by programming my own.
- the formula was in the manual for the gauge
- probably like 10.5v
3.probably like 1.5v, but if you want to know exact values you can solve the equation.