Jeff N HOW IS THIS MACHINE CALIBRATED? I WOULD BE USING THIS AT HOME TO VERIFY THE TANK. DIVE SHOP IS 1.5 HR DRIVE. WHERE MY WIFE WORKS . IS SHE IS ABLE TO P.U. TANK I WOULD LIKE TO VERIFY. OR ON SITE VERIFY, DIVE BOAT IN CASE TANKS ARE MIXED UP OR MOVED.
KEVIN F You use ambient air to calibrate the sensor, by setting it to the appropriate oxygen setting given your local tempterature and relative humidty..
JAMES G H The calibration is very easy. Please see the following from the owner's manual. If you lose your manual you can download from the manufacturer's website.
3.2 Air Calibration
WARNING
The analyser is sensitive to Oxygen partial pressure. Calibration must always be carried out at the same atmospheric pressure as Oxygen measurement.
Air calibration is essential before every use and is performed as follows.
1. Ensure that the sensor saver is not in place and that the EII adapter is fitted. The adapter simply pushes into the sensor aperture.
2. Expose the analyser to clean air for two minutes and adjust the calibration knob until the display reads the correct value using the oxygen compensation chart (you can find this chart on the inside of the back cover). If this is not possible refer to the note below or to Sections 4.0, Quick Check and 5.0, After Sales Service.
WEBSTER R In a perfect world, you would use a tank of regular air and adjust until you hit 20.9%. In a less than perfect world (clean air with regular humidity - i.e. in your house with the AC on if possibl) you can adjust to 20.9%.
JOACHIM M The calibration is done using an attached chart to set the sensed oxygen level to ambient air. On a standard day, this is approximately 20.9%. The black rotary knob is used to set this value on the display, then the unit is ready to measure any tank content up to 100% O2. A very simple process.
SUSAN S You can calibrate the unit of off a regular scuba tank with air or you can use the chart that comes with the unit. You need to know the air temperature and the humidity for the chart to calibrate it that way. I always use a tank of air to calibrate it each time I use it.
DALELYNN S Not sure what you mean ?calibrated? but if you are talking zeroed at 21% (air) this is accomplished by waving it in ambient air and using the supplied chart (if hot and high RH) or using a scuba tank with air. Then simply sample the nitrox.
FRANK B I bought the Analog O2EII Analyzer in May and have verified it with my local dive shop a couple times. Basically I took my tanks to the shop, had them Nitrox filled, tested with the shop analyzer (same model) then tested with mine..each time the readings were consistent and within .1 of each other. I've done this two more times about 2 months apart and get the same results. Also checked it once at a destination site and had same results.
ROBERT G use the black knob to calibrate. Regular air is 20.9% oxygen, so calibrate it accordingly.