Manual Casio 5415 - PRG-280 (page 5 of 8) (English)

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E-32

Storage

• The precision of the bearing sensor may deteriorate if the watch becomes magnetized. Because of

this, you should store the watch away from magnets or any other sources of strong magnetism,

including: permanent magnets (magnetic necklaces, etc.), concentrations of metal (metal doors,

lockers, etc.), and household appliances (TVs, personal computers, washing machines, freezers, etc.)

• Whenever you suspect that the watch may have become magnetized, perform the procedure under “To

perform bidirectional calibration” (page E-24).

E-33

Taking Temperature Readings

This watch uses a temperature sensor to measure temperature.

To take temperature readings

While in the Timekeeping Mode, press

•

TEMP

will appear in the lower display and temperature measurement

will start. After about one second, the measurement reading will

appear in the upper display.

• The watch will continue to take temperature readings every ﬁ ve

seconds for about two minutes.

• The watch will return to the Timekeeping Mode after the reading

operation is complete (about two minutes).

• Pressing

while a reading operation is in progress will stop the

operation and enter the Timekeeping Mode.

Temperature

• Temperature is displayed in units of 0.1°C (or 0.2°F).

• The displayed temperature value changes to

- - -

°C (or °F) if a measured temperature falls outside the

range of –10.0°C to 60.0°C (14.0°F to 140.0°F). The temperature value will reappear as soon as the

measured temperature is within the allowable range.

TemperatureTemperature

E-34

Display Units

You can select either Celsius (°C) or Fahrenheit (°F) for the displayed temperature value. See “To specify

the temperature unit” (page E-36).

Temperature Sensor Calibration

The temperature sensor built into the watch is calibrated at the factory and normally requires no further

adjustment. If you notice serious errors in the temperature readings produced by the watch, you can

calibrate the sensor to correct the errors.

Important!

• Incorrectly calibrating the temperature sensor can result in incorrect readings.

Carefully read the following before doing anything.

–

Compare the readings produced by the watch with those of another reliable and 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.

E-35

To calibrate the temperature sensor

1. Take a reading with another measurement device to determine the

exact current temperature.

2. With the watch in the Timekeeping Mode, press

to enter the

Thermometer Mode.

3. Hold down

for about two seconds until the temperature reading

disappears from the bottom display. Release

at this time, which will

cause the temperature reading to ﬂ ash, which indicates the setting

mode.

4. Use

(+) and

(−) to calibrate the temperature value with the reading of another instrument.

• Each press of a button changes the temperature value in units of 0.1°C (0.2°F).

• To return the temperature to its uncalibrated value (OFF setting), press

and

at the same

time.

5. Press

to return to the Thermometer Mode.

Thermometer Precautions

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 all moisture from the

case. It takes approximately 20 to 30 minutes for the case of the watch to reach the actual surrounding

temperature.

E-36

Specifying Temperature Unit

Use the procedure below to specify the temperature unit to be used in the Thermometer Mode.

Important!

When

TOKYO

is selected as the Home City, the temperature unit is set automatically to Celsius (

°C

). This

setting cannot be changed.

To specify the temperature unit

1. In the Timekeeping Mode, press

to enter the Thermometer Mode.

2. Hold down

for about two seconds until the temperature reading

disappears from the bottom display. Release

at this time, which will

cause the temperature reading to ﬂ ash, which indicates the setting

mode.

3. Press

to display the current temperature unit in the upper display.

4. Press

to toggle the temperature unit between

°C

(Celsius) and

°F

(Fahrenheit).

5. After the setting is the way you want, press

to exit the setting

screen.

E-37

Checking the Current Time in a Different Time Zone

You can use the World Time Mode to view the current time in one of 31 time zones (48 cities) around the

globe. The city that is currently selected in the World Time Mode is called the “World Time City”.

• You also can swap the current World Time City and Home Time City in the World Time Mode (page

E-39).

To enter the World Time Mode

Use

to select the World Time Mode as shown on page E-8.

• The mode dial hand will point to

, and the current city code and city

name will scroll across the lower display. After that, the city code will

remain shown in the lower display. You can scroll the city code and

city name again by pressing

• The digital meter shows the seconds count.

• The hour, minute, and second hands will indicate the current

Timekeeping Mode time.

Currently selected

World Time City

Current time in the currently

selected World Time City

Currently selected

World Time City

Current time in the currently

selected World Time City

E-38

To conﬁ gure World Time City and summer time settings

1. In the World Time Mode, use

(East) to scroll through city codes.

• For details about city codes, see the “City Code Table” at the back of this manual.

• Holding down

will scroll at high speed.

• Pressing down

and

at the same time will jump to the UTC city code.

2. To toggle between summer time (

DST

in the upper display) and standard time (

DST

not displayed),

hold down

DST indicator

Hold down A

• Using the World Time Mode to change the DST setting of the city code that is selected as your

Home City also will change the Timekeeping Mode time DST setting.

• Note that you cannot switch between standard time/daylight saving time (DST) while UTC is

selected as the World Time City.

• Note that the standard time/daylight saving time (DST) setting affects only the currently selected

city code. Other city codes are not affected.

E-39

Swapping the Home City and World Time City

You can use the procedure below to swap your Home Time City (whose time is indicated by the hands)

with your World Time City (whose time is indicated by the digital display).

This function comes in handy for those who often travel between two different time zones.

• You need to conﬁ gure starting Home City and World Time City settings before performing the

procedure below.

To conﬁ gure Home City settings (page E-13)

To conﬁ gure World Time City and summer time settings (page E-38)

To swap your Home Time and World Time Cities

Press

and

at the same time.

• The times indicated by the hand (Home City time) and on the digital display (World Time City time) will

be swapped with each other.

$ and %

New World Time

City and Time

Home City [LON] Time

Current World Time

City and Time

Home City [TYO] Time

Operation Guide 5415

I replaced both batteries in Pro Trek PRG-280 watch. Watch is running.. second hand moving.. in timekeeping mode when holding in the "adjust" button.. nothing changes. Where day of week should display is showing the word "OPEN". Suggestions on what i need to do/ Submitted on 1-9-2021 at 17:10
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