Casio 1675 General Manual

1675-1

C

D

BA

P

Module No. 1675

A


A


°

C

m

RECALL

AUTO

ALTI

AUTO

P

°

C

m

ALTI

AUTO

2 seconds later

• Press C to change from mode to mode.

• Hold down C for one or two seconds in any mode to switch back to the

Timekeeping Mode.

Timekeeping Mode

Stopwatch Mode

▼

Recall Mode

Alarm Mode

▼

▲

▲

( Timekeeping Display)

Press D.

Altimeter Mode

GENERAL GUIDE

▼

C

D

BA

P

P

°

C

hPamb

Sensor

( Pressure/Temperature

Display )

P

AUTO

P

AUTO

AUTO

BACKLIGHT

This watch features an electroluminescent (EL) backlight that helps you
easily read the face, even in total darkness. Its Auto Backlight function
automatically lights the watch face whenever you turn your wrist towards your
face.

Note

• The backlight of the watch employs an electroluminescent (EL) light, which
loses illuminating power after very long use.

• Frequent use of the backlight shortens the battery life.

• The illumination provided by the backlight may be hard to see when viewed

under direct sunlight.

• The watch will emit an audible sound whenever the display is illuminated.
This is caused by a transistor that vibrates when the EL panel lights up. It
does not indicate malfunction of the watch.

• The backlight automatically turns off whenever an alarm sounds or when
you press the C or D button.

To manually turn on the backlight

In the Timekeeping Mode or the Altimeter
Mode, press B to illuminate the display for
about two seconds.

• The backlight remains lit for about two
seconds from the point you press B, even
if it is already lit when you press B. If you
keep B depressed for one or two minutes,
the backlight will automatically turn off.

To switch the auto backlight function on and off

In the Timekeeping Mode, hold down D for one or two seconds to turn the
auto backlight function on and off.

• The auto backlight indicator is shown on the display in all modes while the
auto backlight function is on.

• In order to protect against running down the battery, the auto backlight
function is automatically turned off approximately two or three hours after
you turn it on. Repeat the above procedure to turn the auto backlight
function back on if you want.

• Pressing B in the Timekeeping Mode or Altimeter Mode illuminates the
display for about two seconds, regardless of the auto backlight function on/
off setting.

About the Auto Backlight function

While the Auto Backlight function is turned on, the backlight automatically
lights for about two seconds in any mode whenever you position your wrist as
described below.

Auto backlight
indicator

OFFON

Important!

Avoid wearing the watch on the inside of your wrist. Doing so causes the Auto
Backlight to operate when it is not needed, which shortens battery life.

Moving the watch to a position that is parallel to the ground and then tilting
it towards you more than 40 degrees causes the backlight to illuminate.

• The backlight may not illuminate if the face of the watch is more than 15
degrees off parallel as shown below. Make sure that the back of your hand
is parallel to the ground.

• Static electricity or magnetic force can interfere with proper operation of the
auto backlight function. If the auto backlight does not illuminate, 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
or less after turn the face of the watch towards you. This does not necessarily
indicate malfunction of the backlight.

Warning!

• Never try to read your watch when mountain climbing or hiking in
areas that are dark or in areas with poor footing. Doing so is dangerous
and can result in serious personal injury.

• Never try to read your watch when running where there is the danger
of accidents, especially in locations where there might be vehicular or
pedestrian traffic. Doing so is dangerous and can result in serious
personal injury.

• Never try to read your watch when riding on a bicycle or when
operating a motorcycle or any other motor vehicle. Doing so is
dangerous and can result in a traffic accident and serious personal
injury.

• When you are wearing the watch, make sure that its auto backlight
function is turned off before riding on a bicycle or operating a
motorcycle or any other motor vehicle. Sudden and unintended
operation of the auto backlight can create a distraction, which can
result in a traffic accident and serious personal injury.

Parallel to ground

Parallel to
ground

More
than
40°

More than 15
degrees too high

More than 15
degrees too low

1675-2

C

D

BA

°

C

hPamb

°

C

Temperature Adjustment

hPa(mb)/inHg

m/ft °C/°F

Barometric Pressure Adjustment

C

D

BA

°

C

hPamb

CHANGING THE MEASUREMENT UNITS

You can change the measured values displayed by the watch between the
following units.
Altitude: meters (m)

↔ feet (ft)

Temperatures: Celsius (°C)

↔ Fahrenheit (°F)

Barometric Pressure: hecto-pascals/millibars (hPa/mb)

*

↔ inchesHg (inHg)

*

Some countries call this unit hecto-pascal (hPa), while other countries call
it millibars (mb). It really makes no difference, because 1 hPa = 1 mb. In
this manual, we will refer to hPa/mb or hPa (mb).

Important!

• Certain measurement functions are automatically terminated when you
change the measurement units. Be sure that you perform this operation
before starting actual measurements.

• Changing the altitude unit of measurement automatically switches the
altitude alarm off.

• Changing the barometric pressure unit of measurement automatically restarts
the barometric pressure graph from a new value.

• Changing any of the units of measurement immediately starts to display
newly measured data in the unit you specify. It also affects the unit of
measurement for any data already stored in memory.

To change the measurement units

1. In the Timekeeping Mode, press D until
the Barometric Pressure/Temperature
Display appears.

2.Hold down A until “OFF” (or the
temperature value) appears flashing in the
display. The data on the display is flashing
because it is

selected

.

3. Press C to change the selection in the
following sequence.

4. Use C to select the unit (°C/°F,
hPa(mb)/inHg or m/ft) you want.

5. Press D to select the currently selected
unit.

6. After making your selection, press A to
return to the Timekeeping Mode (Pressure/
Temperature Display).

Seconds

Month

Hour Minutes

Date Year

TIMEKEEPING FUNCTION

To set the time and date

1. In the Timekeeping Mode, press D until
the Timekeeping Display appears.

2. Hold down A until the seconds digits start
to flash on the display. The seconds digits
flash because they are

selected

.

3. Press C to change the selection in the
following sequence.

4. While the seconds digits are selected (flashing), press D to reset the
seconds to “00”. If you press D while the seconds count is in the range of
30 to 59, it is reset to “00” and 1 is added to the minutes. If the seconds
count is in the range of 00 to 29, the minutes count is unchanged.

• Press B to switch between the 12-hour and 24-hour formats.

5. While any other digits (besides seconds) are selected (flashing), press D
to increase the number. Holding down D changes the current selection at
high speed.

6. After you set the time and date, press A to return to the Timekeeping
Mode (Timekeeping Display).

• The day of the week is automatically set in accordance with the date.

• The date can be set within the range of January 1, 1995 to December 31,

2039.

• If you do not operate any button for a few minutes while a selection is

flashing, the flashing stops and the watch goes back to the Timekeeping
Mode automatically.

C

D

BA

P

Day of week

Month

Minutes

Hour Seconds

Date

Year

PM
indicator

C

D

BA

P

°

C

hPamb

Barometric pressure graph

*

1

(Unit: 1 hPa(mb)/0.05 inHg)

Temperature Last measurement

(updated every 2 hours)

*

2

( Barometric Pressure/Temperature Display )

BAROMETER FUNCTIONS

This watch uses a pressure sensor to measure air pressure. This sensor can
be calibrated.

Important!

The barometer that is built into this watch measures changes in air pressure,
which you can then apply to your own weather predictions. It is not intended
for use as a precision instrument in official weather prediction or reporting
applications.

Example barometer applications

• Before going mountain climbing, you can take readings to find out the
probable upcoming weather.

• You can predict the weather for golf or other outdoor activities.

About barometric measurements

The barometer automatically takes measurements every two hours (starting
from midnight), regardless of what mode you are in. Barometric pressure
measurements are also taken every five seconds for three minutes after you
display the Timekeeping Mode’s Barometric pressure/Temperature display.
The last measurement result, along with the current temperature is displayed
in the Barometric pressure/Temperature display.

Understanding the barometer display

1. Use C to enter the Timekeeping Mode.

2. Press D to display the Barometric Pressure/Temperature Display.

*

1 The barometric pressure graph shows the barometric readings for the

past 26 hours. The flashing point on the right of the display is the point for
the last measurement.

*

2 The display shows “– – – – hPa/mb” (or inHg) if a measured value falls

outside the range of 460 hPa/mb to 1100 hPa/mb (13.55 inHg to 32.45
inHg). The normal display will return as soon as the pressure returns
within the allowable range.

Using the barometric pressure graph

Changes in barometric pressure are caused by changes in the weather and
temperature. The following shows how to interpret the data that appears on
the barometric pressure graph.

Note that if there are sudden
changes in weather or tempera­ture, the graph line of past meas­urements may run off the top or
bottom of the display. The entire
graph will become visible once
barometric conditions stabilize.

The following conditions cause the barometric pressure measurement to be
skipped, with the corresponding point on the barometric pressure graph
being left blank.

• Barometric reading that is out of range (460 hPa/mb to 1100 hPa/mb or

13.55 inHg to 32.45 inHg)

• Sensor malfunction

• Dead battery

Calibrating the barometric pressure measurement

The sensor of this watch is calibrated at the factory before shipment and
further adjustment is normally not required. If noticeable error is found in the
barometric pressure readings produced by the watch, you can adjust it to
correct the error.

Important!

Incorrectly calibrating the barometric pressure measurement of this watch
can result in incorrect readings. Compare the readings produced by the
watch with those of another reliable accurate barometer.

A rising graph generally means better
weather.

A falling graph generally means
deteriorating weather.

Not visible on display

1675-3

C

D

BA

°

C

hPamb

To calibrate the barometric pressure

1. In the Timekeeping Mode, use D to
display the barometric pressure and
temperature.

2. Hold down A until the display clears.
“OFF” or the temperature value should be
flashing on the display.

3. Press C to show the barometric pressure calibration display. At this time,
“OFF” or the barometric pressure value should be flashing on the display.

• The “OFF” indicator appears when the factory setting is being used for the

calibration.

4. Each press of D increases the displayed barometric pressure by 1 hPa/
mb, while pressing B decreases it. Holding down either button changes
the value at high speed.

• If you have selected inHg as your unit of measurement, the above operations

change the reading by 0.05 inHg.

• Pressing B and D at the same time returns to the “OFF” display.

5. After calibrating the barometric pressure, press A to return to the
Barometric Pressure/Temperature Display.

• If you do not operate any button for a few minutes while the barometric

pressure digits are flashing, the flashing stops and the watch goes back to
the Barometric Pressure/Temperature Display.

C

D

BA

P

°

C

hPamb

THERMOMETER FUNCTIONS

A built-in temperature sensor measures temperature and shows the measured
value on the display. The thermometer can be calibrated.

Important!

Temperature measurements are affected by your body temperature (while
you are wearing the watch), direct sunlight, and moisture. To achieve a more
accurate temperature measurement, remove the watch from your wrist, place
it in a well ventilated location out of direct sunlight, and wipe off all moisture
from the case. It takes approximately 20 to 30 minutes for the case of the
watch to reach the actual surrounding temperature.

About temperature measurements

Temperature measurements are taken automatically every five minutes,
regardless of what mode the watch is in. Measured temperature values can
be viewed in the Timekeeping or Altimeter Modes. Temperature measurements
are taken every five seconds for the first three minutes after you display the
Timekeeping Mode’s Barometric Pressure/Temperature display, or after you
enter the Altimeter Mode. After that, temperature measurements are taken
every five minutes.

• Temperature measurement data can be recalled along with altitude

measurement data. For details, see About memory data.

Understanding the temperature display

1. Use C to enter the Timekeeping Mode.

2. Press D to display the Barometric Pressure/Temperature Display.

• The display shows “– –.– ° C” (or °F) if a measured value falls outside the

range of –20.0°C to 60.0°C (–4.0°F to 140.0°F). The normal display will
return as soon as the temperature returns within the allowable range.

• For details on viewing the temperature in the Altimeter Mode, see

Understanding the altimeter display.

Calibrating the temperature measurement

The temperature sensor of this watch is calibrated at the factory before
shipment and further adjustment is normally not required. If noticeable error
is found in the temperature readings produced by the watch, you can adjust it
to correct the error.

Important!

Incorrectly calibrating the temperature measurement of this watch can result
in incorrect readings. Carefully read the following before doing anything.

• Compare the readings produced by the watch with those of another reliable,

accurate thermometer.

• If adjustment is required, remove the watch from your wrist and wait for 20

or 30 minutes to give the temperature of the watch time to stabilize.

Temperature

( Barometric Pressure/Temperature Display )

C

D

BA

°

C

hPamb

To calibrate the temperature

1. In the Timekeeping Mode, use D to display
the barometric pressure and temperature.

2. Hold down A until the display clears.
“OFF” or the temperature value should be
flashing on the display.

•The “OFF” indicator appears when the

factory setting is being used for the
calibration.

3. Each press of D increases the displayed temperature by 0.1°C while
pressing B decreases it. Holding down either button changes the value at
high speed.

• If you have selected Fahrenheit as your unit of measurement, the above

operations change the reading by 0.2°F.

• Pressing B and D at the same time returns to the “OFF” display.

4. After calibrating the temperature, press A to return to the Barometric
Pressure/Temperature Display.

• If you do not operate any button for a few minutes while the temperature

digits are flashing, the flashing stops and the watch goes back to the
Barometric Pressure/Temperature Display.

ALTIMETER FUNCTIONS

A built-in altimeter uses a pressure sensor to detect the current air pressure,
which is then used to estimate the current altitude in accordance with ISA
(International Standard Atmosphere) values for altitude and air pressure. If
you preset a reference altitude, the watch will also calculate the current
relative altitude based on your preset value. Altimeter functions also include
data storage memory and an altitude alarm.

Important!

• This watch estimates altitude based on air pressure. This means that

altitude readings for the same location may vary if air pressure changes.

• Sudden changes in the weather make it impossible to produce accurate

altitude readings.

• This watch employs a semiconductor pressure sensor, which is affected by

temperature changes. When taking altitude measurements, be sure to do
so while ensuring that the watch is not exposed to temperature changes.

• Do not use this watch while participating in sports where there are sudden

altitude changes. Also, do not use this watch for applications that demand
professional or industrial level precision. This watch should not be used
while engaging in the following activities: sky diving, hang gliding,
paragliding, gyrocopter riding, glider riding, etc.

Applications

When no reference altitude is preset:

• The watch produces approximate altitude readings.

When a reference altitude is preset:

• Before beginning the climb, set the reference altitude to 0 m at the foot of

the mountain. This makes it possible to determine the difference in altitude
between the reference point and your destination.

• To determine the height of a tall

building, set the reference altitude to
0 m on the ground floor. Note,
however, that if the building is
pressurized or air conditioned, you may
not be able to get a good reading.

• To determine the difference in altitude between your house and another

location, set the reference altitude to 0 m at your house, and then check the
reading when you arrive at the other location.

• When mountain climbing, you can input

the altitude from a marker as your
reference altitude, which will then let
you know your altitude as your climb
proceeds. The following conditions will
prevent you from obtaining accurate
readings:

When air pressure changes because of changes in the weather
Extreme temperature changes
When the watch itself is subjected to strong impact

About altitude measurements

There are two types of altitude measurements: those for displayed data
(Altimeter Mode measurement) and those for memory data (memory
measurements; See Memory measurements).

400