The user manual for this analyzer specifically states: "Never calibrate with 20.9% oxygen or room air with the intent of taking oxygen measurements at oxygen levels above 30% oxygen" This makes it quite useless for Nitrox divers, or am I missing something?
The Palm D Oxygen Analyzer is designed to meet the requirements of oxygen measurements for the purposes of recreational diving applications. Best practice for the most accurate nitrox measurement is calibrating and sampling at 2 liter-per-minute flow using air or 21% oxygen for the intent of taking measurements of oxygen levels below 50%, or using 100% oxygen for the intent of taking measurements of oxygen levels 50% and above.
Note: You are referencing an early version of the user manual that contained an error. The user manual was updated to in 2018 to specify 40% (instead of 30%) and now reads... "The devices are designed to meet the requirements for both ambient and elevated oxygen measurements but should NEVER be calibrated with air or 21% oxygen with the intent of taking oxygen measurements at oxygen levels above 40% oxygen. Accordingly, the devices may be calibrated with either air (20.9%) or 100% oxygen which requires the user to make a conscious decision to bypass or skip the recommended 100% oxygen calibration.
This video shows performing unit calibration using tank gas? Who would ever trust tank gas to be of any particular mix, I mean this is why we are testing tanks in the first place!!! What kind of gas is Palm smoking?
The video illustrates calibrations using _known_ gases, both from ambient and compressed sources. The tank of compressed air used for calibration is not the same as the tank containing an unknown gas being analyzed. If the gas contents of a tank is unknown, then it is not an appropriate calibration gas. The Palm D does include a safety feature in that the calibration will error if the gas being used for calibration does not produce a sensor mv reading near expected for either air or pure oxygen. However, using a tank of compressed air for calibration is the recommended calibration method that produces the most accurate analysis results for sport nitrox mixtures. For more information about calibration best practices, read www.divegearexpress.com/library/tek-tips/calibrating-analyzers-with-air
Should one hold his hand around the analyzer in some way while testing?
The user manual for this analyzer specifically states:
"Never calibrate with 20.9% oxygen or room air with the intent of taking oxygen measurements at oxygen levels above 30% oxygen"
This makes it quite useless for Nitrox divers, or am I missing something?
The Palm D Oxygen Analyzer is designed to meet the requirements of oxygen measurements for the purposes of recreational diving applications. Best practice for the most accurate nitrox measurement is calibrating and sampling at 2 liter-per-minute flow using air or 21% oxygen for the intent of taking measurements of oxygen levels below 50%, or using 100% oxygen for the intent of taking measurements of oxygen levels 50% and above.
Note: You are referencing an early version of the user manual that contained an error. The user manual was updated to in 2018 to specify 40% (instead of 30%) and now reads...
"The devices are designed to meet the requirements for both ambient
and elevated oxygen measurements but should NEVER be calibrated
with air or 21% oxygen with the intent of taking oxygen measurements
at oxygen levels above 40% oxygen.
Accordingly, the devices may be calibrated with either air (20.9%) or
100% oxygen which requires the user to make a conscious decision to
bypass or skip the recommended 100% oxygen calibration.
@@DiveGearExpress Thanks for clarifying
This video shows performing unit calibration using tank gas? Who would ever trust tank gas to be of any particular mix, I mean this is why we are testing tanks in the first place!!! What kind of gas is Palm smoking?
The video illustrates calibrations using _known_ gases, both from ambient and compressed sources. The tank of compressed air used for calibration is not the same as the tank containing an unknown gas being analyzed. If the gas contents of a tank is unknown, then it is not an appropriate calibration gas. The Palm D does include a safety feature in that the calibration will error if the gas being used for calibration does not produce a sensor mv reading near expected for either air or pure oxygen. However, using a tank of compressed air for calibration is the recommended calibration method that produces the most accurate analysis results for sport nitrox mixtures. For more information about calibration best practices, read www.divegearexpress.com/library/tek-tips/calibrating-analyzers-with-air