I've used Analox nitrox analyzers for years in shops and dive boats, and finally got my own, an O2EII. This past weekend (send time I've used it), I calibrated with an air tank to 20.9, walked over to my tank to see what the dive boat was pumping in with their membrane, and before I measured my tank, looked down and the display on my O2EII and it was off by a few percent. Is this normal? It wasn't particularly hot or humid, just typical So Cal conditions. I recalibrated against the same tank, and when I got back to my tank the display read one percent different in the opposite direction. Do new sensors take a few times to settle in? Am I doing something wrong? Or is there something wonky with my O2EII?
It was bought new as a sealed unit, and I've kept the O2 sensor cover on except when on the dive boat; it lives in a little Pelican case when not in use
It was bought new as a sealed unit, and I've kept the O2 sensor cover on except when on the dive boat; it lives in a little Pelican case when not in use