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Timex Helix ABT.
This watch calculates altitude by measuring air pressure and relating that value to the international standard atmosphere. 1013.25 mb = 0 metres.
The Timex ABT does not display negative altitude values. So if the measured air pressure is greater than 1013.25 mb and the altimeter is reset (select altimeter, pull out the crown 1 click and press and hold the lower left button) the watch will display LO. You can experiment with this. Wait till the barometer reads 1013 or 1012 and reset the altimeter. The watch will display zero or maybe 5 metres. Or wait till the pressure goes up to, say, 1022 and reset the altimeter. The watch will read LO again. If this happens alot, you probably live fairly close to sea level. What you can do to trick the watch is use a vacuum cleaner to raise the perceived altitude of the watch then calibrate the altimeter (pull out and rotate the crown) and change the altimeter reading to, say, 200 metres. It wont read LO then. Keep an eye on it and the atmospheric pressure. If the pressure starts to rise then adjust the altimeter accordingly. Remember this watch is designed to measure proper altitudes where the air pressure isnt likely to be as high as 1013.25. If you are mooching around near sea level the naturally changing air pressure will often make the watch read LO.
If you live up in Montana at 1500 metres (ISA standard pressure about 840 mb) all the time then the watch will always read a positive value and you can calibrate it from reference to a map or road sign etc. The atmospheric pressure will unlikely reach as high as 1013 up there and the watch wont read LO.
Erik, the altimeter uses barometric pressure to determine changes in elevation. Rule one is whenever you know the elevation for a fact, adjust it as the barometer is changing often and therefore affecting the altimeter reading. The only sure way to avoid this is use GPS. Altitude is derived from locating 3 or 4 satellites in a geo syncrohnus(SP?) orbit. Pilots always reset the altimeter before take off and you should too. Find elevations on road signs, maps, etc.
The riseman can be reset but also needs to be calibrated. Your instruction manual will walk you through calibrating your altimeter. If you have misplaced your manual you can download a manual from Casio's website.
Certain functions need to be calibrated. The altimeter and the Meteo are tied together. When a customer gets the watch, they should calibrate to either the Meteo or Altimeter. The easiest way to find out the altitude of the nearest airport (you can usually get this on line) and then go to the airport and adjust the watch. This will also calibrate the Meteo.
To calibrate the Altimeter: 1. Activate Crystal 2. Press Altimeter 3. Press and hold top + button until the watch beeps and display flashes. 4. Use + and – buttons to adjust altitude 5. Press center of dial to lock in.
altitude changes depending on pressure; because you are along ocean, you experience it more than usual.
M problem is that temperature remains higher than normal one (30°C), can you solve it ?
Certain functions need to be calibrated. The altimeter and the Meteo are tied together. When a customer gets the watch, they should calibrate to either the Meteo or Altimeter. The easiest way to find out the altitude of the nearest airport (you can usually get this on line) and then go to the airport and adjust the watch. This will also calibrate the Meteo.
To calibrate the Altimeter:
1. Activate Crystal 2. Press Altimeter 3. Press and hold top + button until the watch beeps and display flashes. 4. Use + and – buttons to adjust altitude 5. Press center of dial to lock in.
1. How do you know the meteo is wrong? Are you comparing against a known good measurement device?
2. The altimeter requires adjustment every few days or whenever there's a weather change. Select the altimeter, hold the upper or lower button until you have the correct altimeter reading for where you are and it will hold for a few days.
For example, I know my home is at 100m elevation (I checked on a topo map) so I reset it to 100m when I leave the house in the morning. It varies (in my case) by over 100m in either direction, depending on the weather.
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