Casio 3145 User manual

Module No. 3145

Getting Acquainted
Congratulations upon your selection of this CASIO watch. To get the most out
of your purchase, be sure to read this manual carefully.
•Be sure to keep all user documentation handy for future reference.
Applications
The built-in sensors of this watch measure barometric pressure, temperature
and altitude. Measured values are then shown on the display. Such features
make this watch useful when hiking, mountain climbing, or when engaging in
other such outdoor activities.
E

E-1
Keep the watch exposed to bright light
The electricity generated by the solar cell of the
watch is stored by a built-in battery. Leaving or
using the watch where it is not exposed to light
causes the battery to run down. Make sure the
watch is exposed to light as much as possible.
•When you are not wearing the watch on your
wrist, position the face so it is pointed at a
source of bright light.
•You should try to keep the watch outside of
your sleeve as much as possible. Charging is
reduced significantly if the face is covered only
partially.
l
l
l
l
l
l
l
l
l
l
l
Bright light
Solar cell

E-2
•The watch continues to operate, even when it is not exposed to light.
Leaving the watch in the dark can cause the battery to run down, which will
cause some watch functions to be disabled. If the battery goes dead, you
will have to re-configure watch settings after recharging. To ensure normal
watch operation, be sure to keep it exposed to light as much as possible.
Bright light
Electrical
energy
All
functions
enabled
LEVEL 1
LEVEL 2
LEVEL 3
LEVEL 4
Charge
Solar cell
(Converts light to
electrical power.)
Rechargeable battery
LEVEL 1
LEVEL 2
LEVEL 3
LEVEL 4
Some
functions
disabled
Dis-
charge
Battery charges in the light. Battery discharges in the dark.

E-3
•The actual level at which some functions are disabled depends on the
watch model.
•Frequent display illumination can run down the battery quickly and require
charging. The following guidelines give an idea of the charging time
required to recover from a single illumination operation.
Approximately five minutes exposure to bright sunlight coming in through
a window
Approximately 50 minutes exposure to indoor fluorescent lighting
•Be sure to read “Power Supply” (page E-86) for important information
you need to know when exposing the watch to bright light.
If the display of the watch is blank...
If the display of the watch is blank, it means that the watch’s Power Saving
function has turned off the display to conserve power.
•See “Power Saving” (page E-105) for more information.

E-4
Warning!
•The measurement functions built into this watch are not intended for
taking measurements that require professional or industrial precision.
Values produced by this watch should be considered as reasonable
representations only.
•CASIO COMPUTER CO., LTD. assumes no responsibility for any loss,
or any claims by third parties that may arise through the use of this
watch.

E-5
About This Manual
•Button operations are indicated using the letters shown in the illustration.
•Each section of this manual provides you with the information you need to
perform operations in each mode. Further details and technical information
can be found in the “Reference”section.
•To ensure that this watch provides you with the years of service for which it
is designed, be sure to carefully read and follow the instructions under
“Operating Precautions”and “User Maintenance”.
(Light)(Light)

E-6
Contents
General Guide ................................................................................. E-10
Radio-controlled Atomic Timekeeping ........................................... E-12
Altimeter .......................................................................................... E-34
Recalling Altitude Data .................................................................... E-52
Barometer/Thermometer .................................................................E-59
World Time ........................................................................................E-67
Stopwatch ........................................................................................ E-69
Countdown Timer ............................................................................. E-71
Alarms .............................................................................................. E-73
Illumination ...................................................................................... E-77
Questions & Answers ......................................................................E-81
Power Supply ................................................................................... E-86
Timekeeping .....................................................................................E-94
Reference ........................................................................................E-101
Specifications .................................................................................E-118
Operating Precautions ..................................................................E-124
User Maintenance .......................................................................... E-134

E-7
Procedure Lookup
The following is a handy reference list of all the operational procedures
contained in this manual.
To specify your Home City ............................................................. E-13
To perform manual receive .............................................................E-27
To turn auto receive on and off ....................................................... E-29
To check the latest signal reception results ................................. E-30
To view your current altitude ......................................................... E-38
To specify the altitude reading interval ......................................... E-42
To take a manual altitude reading ..................................................E-44
To take altitude readings using the Altimeter Mode
stopwatch ...................................................................................E-44
To specify a reference altitude ....................................................... E-50
To view altitude records and the current Altimeter Mode
stopwatch session record ....................................................... E-56

E-8
To clear the historical record ......................................................... E-58
To take barometric pressure and temperature readings ............. E-59
To view the time in another city ...................................................... E-67
To toggle a city code time between Standard Time
and Daylight Saving Time .........................................................E-68
To measure times with the stopwatch ........................................... E-70
To set the countdown start time .....................................................E-71
To use the countdown timer ........................................................... E-72
To set an alarm time ........................................................................ E-74
To test the alarm ............................................................................... E-75
To turn an alarm and the Hourly Time Signal on and off ............. E-76
To turn on illumination manually .................................................... E-78
To turn the auto light switch on and off .........................................E-80
To set the time and date manually .................................................. E-96
To change the Daylight Saving Time (summer time) setting .... E-100