I suspect the range moves to 33 to 83% but Honestly I'm not sure so I'll have to run more test with the sensor and remote computer.

The manufacturer only states, valid data is represented with a duty cycle of 30 to 80% which porportonal to the percent of oxygen.

We are tapping into the signal of a 02 sensor tied into an onboard engine control computer and transmitting the information via satellite to our terminal. We are trying to have our display read the same as the onboard computers display.

How the onboard computer calibrates..... Actual details totally unknown. We know that when it "does" calibrate, it's done by pressing a button while in clean air (21%) and it sits there for 2 minutes, then exits calibration mode. At that point, their display then shows 21%.

Our plans were to tie into their button, wait the two minutes, then also record the high range so we are calibrated the same.

We know that it can't simulate 0% Oxygen and it's only looking at Clean Air at 21%, waits 2 minutes for the sensor to settle.

Guessing, it's storing the max value and adjusting it to 21% however I will need to run several more test to see how it's output matchs a graph to be sure.

I justed tested a sensor that was actually installed and noticed 40.1% dc = 6.95% o2, which does not follow our chart, however I know for a fact that the sensor was not in "pure" clean air when it was calibrated so it is off.

Even though that is the case, we need to be off the same amount so we see the same reading as the onboard computer.

At this point, it would be best for me to take even more readings with my frequency meter during a calibration process to see how much the signal actually varies and then go from there.