Casio 1675-1 User Manual

Module No. 1675

GENERAL GUIDE

• 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

( Timekeeping Display)

Sensor

Stopwatch Mode

( Pressure/Temperature

Press D.

▼

Display )

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▼

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Altimeter Mode

AUTO

ALTI

▼

2 seconds later

▲

Recall Mode

AUTO

A 

▲

Alarm Mode

A 

AUTO

ALTI

RECALL

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

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.

AUTO

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.

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.

Auto backlight indicator

AUTO

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.

Parallel to ground

• 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.

Parallel to 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.

More than 15 degrees too high

More than 15 degrees too low

More than 40°

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.

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Not visible on display

CHANGING THE MEASUREMENT UNITS

You can change the measured values displayed by the watch between the following units.

Altitude: meters (m) Temperatures: Celsius (°C) Barometric Pressure: hecto-pascals/millibars (hPa/mb)

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

Temperature Adjustment

↔ feet (ft)

↔ Fahrenheit (°F)

↔ inchesHg (inHg)

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m/ft °C/°F

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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

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

hPa(mb)/inHg

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).

selected

Barometric Pressure Adjustment

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.

Barometric pressure graph

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

Temperature Last measurement

(updated every 2 hours)

( 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.

TIMEKEEPING FUNCTION

To set the time and date

Day of week

Year

Hour Seconds

PM indicator

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.

Minutes

Seconds

Date Year

1. In the Timekeeping Mode, press D until

Month

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

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

Date

Hour Minutes

Month

selected

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.

A rising graph generally means better weather.

A falling graph generally means deteriorating weather.

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.

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To calibrate the barometric pressure

1. In the Timekeeping Mode, use D to

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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.

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.

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.

Temperature

( 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.

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To calibrate the temperature

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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.

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.

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).

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