Pressure=10^(1.66*Voltage-11.46), which gives valid values for 0-10 volts as atmospheric pressure is 760 torr and the gauge reads down to 3.8x10^-9 Torr.
1. The formula for Pressure = 10^(1.66*Voltage-11.46). Is it correct?
2. What is the value of Voltage at A0-pin of the UNO when the Pressure is 760 torr?
3. What is the value of Voltage at A0-pin of the UNO when the Pressure is 3.8x10^-9 torr?
It is required that we know the values of the voltages at two points (v1 and v2) for two known pressures (p1 and p2) in order to have your pressure gauge calibrated.