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• 70 PPM – 149 PPM: The alarm must sound when levels reach this range for between 60 – 240 minutes.
• 150 PPM – 399 PPM: The alarm must sound if the carbon monox- ide level remains in this range for between 10 to 50 minutes.
• 400 PPM +: The alarm must sound if the carbon monoxide level remains at or above this level for between 4 to 15 minutes.
Feel free to surf the web to select a CO detector of your own choosing and consider the following more sen- sitive alarm as an example: Available for about $190, CO Experts offers the Model 2016. It displays CO starting at 1 PPM and makes its first alert imme- diately with no time delay at 7 PPM. It has a graduated series of alarms as the CO concentration rises, and there is no time delay between hitting a concen- tration level and the alarm sounding.
It has a silence feature allowing the user to shut off the alarm temporar- ily – the length of time the alarm will remain silent decreases at higher CO concentration levels, and the alarm will sound again after silencing if the CO level increases any amount. The unit has an expected life of five years and includes a monitoring system that warns of a detector failure, low battery and impending end of life of the unit.
CH4 Is Not A Noble Gas
(He, Ne, Ar, Kr, Xe, Rn and Og)
Thank you for reading my humble column, written left-handed from memory without the internet, while on a layover in BOS and not MIA (see “To Err Is Human,” T&T August 2020 for the relevance of MIA). You’ve made it through a life-saving, plain yogurt f lavored article about CO, chemis- try and our respiratory system and cannowmoveontothenextT&T article without regret. Well, except for the regret you may feel after eating
too much butter pecan ice cream. I say go for it; there are no ice cream detectors here. But make certain the ratio of ice cream to chocolate fudge is stoichiometric. If not, you may need to run yourself LOP to thwart N2 + H + CO2 + O2 + CH4 emissions. And if you’re in the yogurt business, please forgive me – no malice was intended; I just don’t like plain yogurt.
Kevin Dingman has been flying for more than 40 years. He’s an ATP typed in the B737 and DC9 with 24,000 hours in his logbook. A retired Air Force major, he flew the F-16 and later performed as an USAF Civil Air Patrol Liaison Officer. He flies volun- teer missions for the Christian organiz tion Wings of Mercy, is employed by a major airline, and owns and operates a Beechcraft Duke.Contact Kevin at dinger10d@gmail.com.
34 • TWIN & TURBINE / September 2020
Covington Aircraft