Casio QW-2802 Service Manual page 8

Table of Contents

Advertisement

Charging Guide
After a full charge, timekeeping remains enabled for up to about 11 months.
The following table shows the amount of time the watch needs to be exposed to light
each day in order to generate enough power for normal daily operations.
Exposure Level (Brightness)
Outdoor Sunlight (50,000 lux)
Sunlight Through a Window (10,000 lux)
Daylight Through a Window on a Cloudy Day (5,000 lux)
Indoor Fluorescent Lighting (500 lux)
Since these are the specs, we can include all the technical details.
Watch is not exposed to light
Internal timekeeping
Display on 18 hours per day, sleep state 6 hours per day
1 backlight operation (1.5 seconds) per day
10 seconds of alarm operation per day
1 hour of calorie measurement per day (one 5-second beeper per day and one
5-second beeper per week when the calorie targets are reached)
Stable operation is promoted by frequent charging.
Recovery Times
The table below shows the amount exposure that is required to take the battery from
one level to the next.
Approximate Exposure Time
Exposure Level
Level 4
(Brightness)
Outdoor Sunlight
2 hours
(50,000 lux)
Sunlight Through a
7 hours
Window (10,000 lux)
Daylight Through a
Window on a Cloudy
10 hours
Day (5,000 lux)
Indoor Fluorescent
117 hours
Lighting (500 lux)
The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.
Reference
This section contains more detailed and technical information about watch operation.
It also contains important precautions and notes about the various features and
functions of this watch.
Timekeeping
Resetting the seconds to
while the current count is in the range of 30 to 59
00
causes the minutes to be increased by 1. In the range of 00 to 29, the seconds are
reset to
without changing the minutes.
00
With the 12-hour format, the P (PM) indicator appears on the display for times in the
range of noon to 11:59 p.m. and the A (AM) indicator appears for times in the range
of midnight to 11:59 a.m.
With the 24-hour format, times are displayed in the range of 0:00 to 23:59, without
any indicator.
The watch's built-in full automatic calendar automatically makes allowances for
different month lengths and leap years. Once you set the date, there should be no
reason to change it except when battery power drops to Level 4.
Auto Return Features
If you leave a screen with flashing digits on the display for two or three minutes without
performing any operation, the watch automatically exits the setting screen.
Scrolling
E
A
The
and
buttons are used in various modes and setting screens to scroll
through data on the display. In most cases, holding down these buttons during a scroll
operation scrolls through the data at high speed.
Power Saving Function
When turned on, the Power Saving function automatically puts the watch into a sleep
state whenever it is left for a certain period in an area where it is dark. The table below
shows how watch functions are affected by the Power Saving function.
Elapsed Time
Display
in Dark
60 to 70 minutes
Blank, with
Display is off, but all functions are enabled.
SLEEP flashing
6 or 7 days
Blank, with
All functions are disabled, but timekeeping
SLEEP not flashing
is maintained.
Wearing the watch inside the sleeve of clothing can cause it to enter the sleep state.
The watch will not enter the sleep state while the Timekeeping Mode time is
between 6:00 AM and 9:59 PM. If the watch is already in the sleep state when the
time reaches 6:00 AM, however, it will remain in the sleep state.
The watch will not enter the sleep state while it is in the Calorie Meter Mode or
Stopwatch Mode.
To recover from the sleep state
Perform any one of the following operations.
Move the watch to a well-lit area. It can take up to two seconds for the display to turn
on.
Press any button.
Angle the watch towards your face for reading.
To turn Power Saving on and off
1. In the Timekeeping Mode, hold down
seconds start to flash, which indicates the setting
screen.
C
2. Press
eight times until the Power Saving on/off
screen appears.
E
3. Press
to toggle Power Saving on (
(
).
OFF
B
4. Press
to exit the setting screen.
The Power Saving on indicator (SAVE) is on the display
in all modes while the Power Saving is turned on.
Approximate
Exposure Time
5 minutes
24 minutes
48 minutes
8 hours
Level 3
Level 2
Level 1
24 hours
7 hours
119 hours
33 hours
242 hours
67 hours
------------
------------
Operation
B
until the
) and off
ON
— 6 —
Backlight Precautions
The electro-luminescent panel that provides illumination loses power after very long
use.
The illumination provided by the backlight may be hard to see when viewed under
direct sunlight.
The backlight automatically turns off whenever an alarm sounds.
The watch may emit an audible sound whenever the display is illuminated. This is
due to vibration of the EL panel used for illumination, and does not indicate
malfunction.
Frequent use of the backlight runs down the battery.
Auto light switch precautions
Wearing the watch on the inside of your wrist, movement of your arm, or vibration of
your arm can cause frequent activation of the auto light switch and illumination of the
display. To avoid running down the battery, turn off the auto light switch whenever
engaging in activities that might cause frequent illumination of the display.
Note that wearing the watch under your sleeve while the auto light switch is turned
on can cause frequent illumination of the display and can run down the battery.
More than 15 degrees
The backlight may not light if the face of the watch is
too high
more than 15 degrees above or below parallel. Make
sure that the back of your hand is parallel to the ground.
The backlight turns off after the preset display
illumination duration (see "To set the time and date"),
even if you keep the watch pointed towards your face.
Static electricity or magnetic force can interfere with proper operation of the auto
light switch. If the backlight does not light, try moving the watch back to the starting
position (parallel with the ground) and then tilt it back toward you again. If this does
not work, drop your arm all the way down so it hangs at your side, and then bring it
back up again.
Under certain conditions, the backlight may not light until about one second after you
turn the face of the watch towards you. This does not necessarily indicate
malfunction of the backlight.
You may notice a very faint clicking sound coming from the watch when it is shaken
back and forth. This sound is caused by mechanical operation of the auto light
switch, and does not indicate a problem with the watch.
Exercising for Optimal Health
Exercises that provide optimal health benefits must be safe and allow you maintain or
exceed your maximum oxygen uptake level. The type of exercise that does this best is
aerobic exercise.
During aerobic exercise you are able to breathe normally, so you generate energy
while taking in oxygen. The body adapts so it can intake and utilize oxygen efficiently
under the stress of the exercise, and so maximum oxygen uptake is increased.
Amount of Exercise Required for Good Health
The following is the amount of exercise (in terms of energy consumed) required daily
for good health.
Engineers, Office Staff
Men: 200 to 300kcal
Women: 100 to 200kcal
Manufacturing, Sales, Service Staff
Men: 100 to 200kcal
Women: About 100kcal
Exercise Duration and Frequency
Continuous Duration: At least 10 minutes of continuous exercise, which is the time
required for the body to respond aerobically to the exercise.
Total Time Per Day: At least 20 minutes
Frequency: Daily
Exercise Precautions
When exercising for health, harder is not necessarily better, nor is longer necessarily
better. In fact, overdoing exercise can even be detrimental to good health.
If you are already under the care of a physician, be sure to exercise in accordance
with your physician's instructions.
Before starting any exercise program, consult a physician, even if you feel you are in
good health.
Exercise Intensity
The relative intensity of an exercise can be expressed in terms of the relative
metabolic rate (RMR) or the metabolic equivalent (MET).
RMR (Relative Metabolic Rate)
The relative metabolic rate is a value that represents additional energy consumed
during exercise as a multiple of basal metabolism. RMR can be calculated using the
following formula.
RMR = (Metabolic Energy Expenditure During Exercise) – (Metabolic Energy
Expenditure at Rest) / Basal Metabolism
MET (Metabolic Equivalent)
The metabolic equivalent is a value that represents energy consumed during exercise
(including metabolic energy expenditure at rest) as a multiple of basal metabolic
energy expenditure at rest. MET can be calculated using the following formula.
MET = Metabolic Energy Expenditure During Exercise / Metabolic Energy Expenditure
at Rest
The following formula can be used to convert between MET and RMR values.
×
MET
0.83
RMR + 1
The activity intensity values used by this watch are MET or MET values converted
from RMR values.
Basal Metabolism: Minimum energy consumption required for life
Metabolic Energy Expenditure at Rest: Energy expenditure when sitting quietly
Metabolic Energy Expenditure During Exercise: Total energy expenditure due to
activity
Sources: Recommended Dietary Allowances for the Japanese
Ministry of Health, Labor and Welfare, Japan
Supervisor: Isao Hashimoto, Ph.D., FACSM
Director, Professor of Physiology
Division of Health and Human Ecology
Institute of Human Living Sciences
OTSUMA WOMEN'S UNIVERSITY

Advertisement

Table of Contents
loading

Table of Contents