I own a Casio gw-9200-1er.Barometer shows 10 units under (HPA) of the normal pressure when set to factory setting (OFF).Changes of barometric pressure appear but always 10 units under normal.I opened the watch,took off the battery,put it back again in place and reset.All functions work normally but barometer still shows 10 units under.The only way to make it show the right bar.pressure is to correct manually.I'm really "pinned down".Does anybody have a solution?

1 atm = 29.92 in Hg (inches of mercury)
1 atm = 760 mm Hg (millimeters of mercury)
1 atm = 1013.20 millibars
1 atm = 14.7 psi (pounds force per square inch)
1 atm = 1013.20 hPa (hectopascals) ...
Unit Number Required Data Entry Elevation Of Barometer ASL Meters Feet Observed Barometer Reading Inches Hg Millibars

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.

You should carefully read the manual on this watch. It is a very sophisticated instrument realitive to its cost.

The barometric pressure in the CAL mode is set to the reference sea level. The pressure that is read in the other areas is the actual or relative pressure at your location.

There are some tollerences for the accuracy of these watches. What they are excellent at is seeing the relative differences or changes. I found that when I set the reference barometric pressure (Sea Level Pressure), everything falls in to place. I found the WP4 to be accurate to within about 15 to 20 feet accuracy for altitude most of the time. It is important to periodically check the barometric pressure from the weather office if you want it to be as accurate as possible.

When hiking or out trecking, it is advisable to check the watch's altitude relative to the map that you are using, or to a known reference. Then as you travel you can check for the altitude change.

Take care that this type of watch is to be used as a quick or easy reference only. It is not certified to be used in situations where life and safety are fully dependent on the readings from this type of watch. It is a precision instrument, but not as precise as the high end professional certified types. It is best to refer to proper maps (charts), and depend on a certified mechanical compass for absolute reference.

Jerry G.

Same problem with my SPF-40, module 2273, after a small helical compression spring, silver color, fell out. I could not determine where it is suppose to be located. It could be the barometric reference spring for sensing the barometric pressure.

It sounds like IC (integrated Circuit) in your watch is mulfunctioning, but can be something else. Can't say without inspection.None of the readings mentioned by you is acceptable.
As the watch is purely microelectronic, there is nothing you can do but to take it back to the retailer and ask for repair or replacement. If your watch is just 10 days old, this must be done under warranty and at no cost to you.
Don't forget to rate, please.

Read my previous solution, please.

Don't forget that the altimeter is barometric, and therefore the altitude reading will change depending on the air pressure - i.e. the weatherman may give the 'high pressure coming through' or that there is a low pressure giving rain - to get the true altitude, you need to know the true air pressure at any given point on the earth ~(where you are) then set this as the 'normal'. you will then get the correct altitude. Don't forget that if you are in a pressurised aircraft - as in allcommercial flights, the cabin air pressure is artificially kept at appx 4000-6000ft altitude

wait until the battery is full reloaded

hi...

press the T button until the crystal is activated.
press the middle of the glass until the time format appears (24hb Cm appears)
hold the T button for 5secs (SYNCHro appears)
move the hands until they are at 12 o'clock. ( + button moves the minute hand. - button moves the hour hand)
press the T button to set.

digital and analogue time are synchronised

pol

Yes, Sir. But remember when pilots reset their altimeter with the local altitude, the pressure value matches the moment wheather pressure. It will be wrong anyway, if you reset you altitude, but the pressure readings are still wrong. Im my case it is happening. The altutide is correct but the pressure of the watch does not match the local pressure. It is 20 hpa over it. By the way, I am an airline pilot.