Thread: Altimeters?
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Old 09-19-05, 06:24 PM
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Originally Posted by TheRCF
Do you have any info on how accurate the Cateye is? If the documentation doesn't specifically address this, I guess one way of getting a rough idea is what range of numbers you get for a given point over a series of days (making sure you have it properly set to begin with each time). I mean, if you calibrate it before starting and go to a point where you previously had a reading of 100 ft, maybe over 4 more days you get numbers ranging from 95 ft to 105 feet. Therefore, you could say it is within +/- 5 feet for that point anyway. More measurements give a better idea.

The min resolution is +/- 10 feet on the HAC4. The absolute elevation changes with the weather, (barametric), so if you want accurate absolute readings you need to calabrate it to some known point of referance, like your home. I've seen it change several hundred feet in a day with severe weather changes.
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