I have a casio g-shock not work the Altitude Measurement

You can get instructions from the Casio web site.

Go to the casio web site "casio.com".

Select "support" and the "manuals",
watches;

Accept terms

Select "watch manual archive"

Read the number of the back of your watch and enter it into the search box

For all those who lost their Casio watch manual. Follow this link, fill in the requested details and download manual. http://world.casio.com/wat/download/en/manual/
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I cannot delete my memory of alti function

PS means the watch is in power save mode if there is an indicator under the PS on your watch. this means the watch will go into a sleep mode when it is left in the dark for extended periods. change this setting by holding the top left button until a city code starts flashing, then press the bottom left button until "PSON" is flashing , you can switch between "PSON" and "PSOF" in this way by pressing the bottom right button. i, and casio recommend leaving the watch in the powersave mode though to help extend battery life. I got all this info from my G Shock manual.

The battery may be running low perhaps. Using the back light is likely to be power consuming and therefore the watch won't leave it on for long.

http://world.casio.com/wat/download/en/manual/

Use the four numbers on the back of your watch and you will have a PDF version of your instruction manual.

Hope this tip helps
R/
David

Check out my tips here and find the instructions manual for your watch.

This watch will set it's self in a 24 hour time frame. You need only set the time zone your in.

If it does not correct it's self change location in your house. It receives the signal at 0200 0400 and 0600 for the correction.

The transmitter is located in Fort Collins, Colorado. this station transmits the time codes and is best received at night.

Hope this tip helps

David

I have several of the both watches and clocks and love them.

please help! i bought casio str 300, and can not turn on auto light, i press buttom light for 2 - 10 seconds, and nothing....

Here is the link to the user manual for this watch if you need it; http://www.lacrossetechnology.com/k2100/manual.pdf page 12 gives you all the contact details for lacrosse. I couldnt find the info online to be sure, but some of these watches do have a separate pressure sensor for altitude and barometric pressure, and sometimes the path to one could get blocked or it could become faulty. I would contact la crosse and find a dealer to get the watch serviced, you could probably do it yourself but you need to get replacement seals from them anyway (these are important). ask them to check if the sensor is clogged, it happens sometimes. Hope this helps :)