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Nixon Delta II PU Watch - Men's
how accurate is the altimeter/how often do you have to calibrate...
By pap2889817
Ranked #661 - Altimeters
April 9, 2009
how accurate is the altimeter/how often do you have to calibrate it?
View Details: Nixon Delta II PU Watch - Men's
Helpful Votes: 0 Yes
By BAinUT
Ranked #486 - Altimeters
April 9, 2009
Once calibrated, most altimeters are accurate to within 50 - 75 feet per every 3000' of elevation (and that's for less well-designed barometric altimeters), assuming little change in ambient barometric pressure. Without going into all the crazy stuff about weather and those pesky isobars, the only time the unit would need frequent calibration would be during changing weather (either a low or high pressure moving into the area), and even then, maybe only 4 times/day to maintain accuracy. Other than that, calibrating the unit each morning should provide fairly accurate results throughout the day.
Helpful Votes: 0 Yes
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