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FAQ | Watches

Features and usage

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Why is automatic time adjustment by phone connection disabled?

Getting Ready ・Make sure the watch is registered for pairing with the phone app.? ・If you have not started up the app for some time, it is recommended that you start it up and establish a Bluetooth connection with the watch.? ・Place the watch close to your phone.? 　(For information about when auto time adjustment is performed, refer to the section about automatic time adjustment by phone connection in the User's Guide.)? To perform auto time adjustment, check to ensure that the watch and your phone are set up as described below. Watch Setup ・Timekeeping screen displayed ・Auto time adjustment setting: ON Phone Setup ・Bluetooth: ON (Turned OFF in the Airplane Mode.) ・Location services: ON, and app location services permissions: ON ・Power saving related functions: OFF (battery, low power, battery, not monitored, and other settings) Note? The impact of phone settings and other factors will vary depending on the operating system version and manufacturer. They are not limited to those described above.? For information about phone settings, consult with your phone manufacturer or the support staff of your contracted carrier.

Is the watch affected by magnetism?

• Though a digital watch normally is not affected by magnetism, very strong magnetism (from medical equipment, etc.) should be avoided because it can cause malfunction and damage to electronic components. • The hands of analog and combination (analog-digital) watches are moved by a motor that uses magnetic force. When such a watch is close to a device (audio speakers, magnetic necklace, cell phone, etc.) that emits strong magnetism, the magnetism can cause timekeeping to slow down, speed up, or stop, resulting in the incorrect time being displayed.

How is the slide rule used?

Using the slide rule A. General Calculation Functions 1) Multiplication Example: 12 × 15 Operation: Align “12” on the outer scale with “10” on the inner scale. Then, “15” on the inner scale corresponds to “18” on the outer scale. Take into account the position of the decimal point and add one zero to obtain 180.? Note that with the scales of this watch, the position of the decimal point cannot be obtained. 2) Division Example: 300 / 15 Operation: Align “30” on the outer scale with “15” on the inner scale. Then, “10” on the inner scale corresponds to “20” on the outer scale. Take into account the position of the decimal point to obtain 20. 3) Reading Ratios Example: 50 / 20 = 30 / x Operation: Align “50” on the outer scale with “20” on the inner scale. Then, “30” on the outer scale corresponds to “12” on the inner scale. At this point, the proportion for every value on the inner and outer scales is “50:20”. 4) Determining Square Root Example: Square root of 169 Operation: Turn the outer scale slowly and find a value that corresponds to both “16.9” on the outer scale and “10” on the inner scale. In this example, “16.9” on the outer scale corresponds to “13” on the inner scale, and “10” on the inner scale corresponds to “13” on the outer scale. Thus, the answer is 13. B. Navigation Calculato r for motor sports 1) Time required Example: Obtain the time required 55 kilometers per hour for 330 kilometers. Operation: Align “55” on the outer scale with the SPEED INDEX “▲” on the inner scale.? Then, “33” on the outer scale corresponds to “6:00” on the inner scale (time scale).? Thus, the time required is 6 hours. * It is calculable also as mile instead of kilometer. 2 ) Speed Example: Obtain the kilometers per hour for 120 kilometers with a time of 1 hour and 30 minutes. Operation: Align “12” on the outer scale with “1:30” on the inner scale (time scale).? Then, the SPEED INDEX “▲” on the inner scale corresponds to “80” on the outer scale.? Thus, the speed is 80 kilometers per hour. 3) Mileage Example: Obtain the mileage when the speed is 40 kilometers per hour and the running time is 1 hour and 30 minutes. Operation: Align “40” on the outer scale with the SPEED INDEX “▲” on the inner scale.? Then, “1:30” on the inner scale (time scale) corresponds to “60” on the outer scale.? Thus, the mileage is 60 kilometers. 4) Rate of fuel consumption Example: Obtain the rate of fuel consumption (liters / hour) when the running time is 5 hours and the fuel consumption is 35 liters. Operation: Align “35” on the outer scale with “5:00” on the inner scale (time scale).? Then, the SPEED INDEX “▲” on the inner scale corresponds to “70” on the outer scale.? Thus, the fuel consumption is 7 liters per hour. 5) Fuel consumption Example: Obtain the fuel consumption required for a running when the rate of fuel consumption is 6 liters per hour and the running time is 5 hours. Operation: Align “60” on the outer scale with the SPEED INDEX “▲” on the inner scale.? Then, “5:00” on the inner scale (time scale) corresponds to “30” on the outer scale.? Thus, the fuel consumption is 30 liters. 6) Estimated running time Example: Obtain the estimated running time when the rate of fuel consumption is 5 liters per hour and the running has 30 liters of fuel. Operation: Align “50” on the outer scale with the SPEED INDEX “▲” on the inner scale.? Then, “30” on the outer scale corresponds to “6:00” on the inner scale (time scale).? Thus, the estimated running time is 6 hours. C. Navigation Calculator for sky sports 1) Time required Example: Obtain the time required for the fight of an aircraft at 160 knots for 240 nautical miles. Operation: Align “16” on the outer scale with the SPEED INDEX “▲” on the inner scale.? Then, “24” on the outer scale corresponds to “1:30” on the inner scale (time scale).? Thus, the time required for the flight is 1 hours and 30 minutes. 2) Speed Example: Obtain the knots (air speed) for 250 nautical miles with a flight time of 1 hour and 40 minutes. Operation: Align “25” on the outer scale with “1:40” on the inner scale (time scale).? Then, the SPEED INDEX “▲” on the inner scale corresponds to “15” on the outer scale.? Thus, the air speed for the flight is 150 knots. 3) Flight distance Example: Obtain the air distance when the air speed is 180 knots and the flight time is 40 minutes. Operation: Align “18” on the outer scale with the SPEED INDEX “▲” on the inner scale.? Then, “40” on the inner scale corresponds to “12” on the outer scale.? Thus, the air distance of the flight is 120 nautical miles. 4) Rate of fuel consumption Example: Obtain the rate of fuel consumption (gallons / hour) when the flight time is 40 minutes and the fuel consumption is 140 gallons. Operation: Align “14” on the outer scale with “40” on the inner scale. Then, the SPEED INDEX “▲” on the inner scale corresponds to “21” on the outer scale.? Thus, the fuel consumption is 210 gallons per hour. 5) Fuel consumption Example: Obtain the fuel consumption required for a flight when the rate of fuel consumption is 240 gallons per hour and the flight time is 1 hours and 40 minutes. Operation: Align “24” on the outer scale with the SPEED INDEX “▲” on the inner scale.? Then, “1:40” on the inner scale (time scale) corresponds to “40” on the outer scale.? Thus, the fuel consumption is 400 gallons. 6) Estimated flight time Example: Obtain the estimated flight time when the rate of fuel consumption is 200 gallons per hour and the aircraft has 1400 gallons of fuel. Operation: Align “20” on the outer scale with the SPEED INDEX “▲” on the inner scale.? Then, “14” on the outer scale corresponds to “7:00” on the inner scale (time scale).? Thus, the estimated flight time is 7 hours. D. Conversion 1) Distance Example: Convert 45 miles into nautical miles and kilometers. Operation: Align “45” on the outer scale with STAT “▲” on the inner scale. Then, NAUT “▲” on the inner scale corresponds to about “39” nautical miles on the outer scale, and KM “▲” on the inner scale corresponds to about “72” km on the outer scale. 2) Weight Example: Convert 16.4 oil lbs. into and liters. Operation: Align “16.4” on the inner scale with OIL LBS “▲” on the outer scale.? Then, U.S. GAL “▲” on the outer scale corresponds to about “2.2” IMP. GAL “▲” on the outer scale corresponds to about“1.8” IMP. gallons on the inner scale, and LITERS “▲” on the outer scale corresponds to about “8.3” liters on the inner scale. 3) Volume Example: Convert 13.1 fuel lbs. into and liters. Operation: Align “13.1” on the inner scale with FUEL LBS “▲” on the outer scale.? Then, U.S. GAL “▲” on the outer scale corresponds to about “2.2” IMP. GAL “▲” on the outer scale corresponds to about “1.8” IMP. gallons on the inner scale, and LITERS “▲” on the outer scale corresponds to about “8.3” liters on the inner scale. 4) Fuel Example: Convert 16.8 Operation: Align “16.8” on the inner scale with U.S. GAL “▲” on the outer scale.? Then, IMP. GAL “▲” on the outer scale corresponds to about “14” IMP. gallons on the inner scale, and LITERS “▲” on the outer scale corresponds to about “63.5” liters on the inner scale.

What are Tough Battery 10 and Long Life Battery?

These are watches with high-capacity batteries that provide long battery life of up to 10 years. Long battery life can be achieved when such a watch is used in accordance with the conditions described under "Battery Life" in the specifications in the watch's User's Guide. Note, however that the battery in the watch when it is purchased is loaded at the factory for test purposes, and it loses some of its charge during the time the watch spends in shipment and on the shelf at the store. Because of this, the original battery may not provide the battery life noted in the specifications. Also note that even if a watch is a 10-year battery life model, it does not mean that the watch has a 10-year warranty. Your watch requires periodic maintenance over time in order to provide the performance for which it is designed. You should have certain parts of your watch (band, water resistance gaskets, etc.) replaced as required when you take your watch in for inspection.

How is a tachymeter used?

A tachymeter can be used to measure the time (within 60 seconds) that it takes to cover one kilometer, and then use that result to determine the approximate average (hourly) speed. 1. Start elapsed time measurement with the stopwatch. 2. Stop the stopwatch operation after a distance of one kilometer is covered. The value on the outside periphery of the bezel that the second hand is pointing to is your average speed. For example, if it takes you 30 seconds to cover one kilometer, the second hand will be pointing to 120. This indicates that your average speed is 120 km/h. The outer tachymeter values indicate average speed based on the time it takes to cover one kilometer. If you cover two kilometers, double the indicated value to calculate average speed. If you cover only 500 meters (half a kilometer), divide the indicated value by two to calculate average speed.

Why isn’t Nightly Recharge displayed (acquired)?

Nightly Recharge data is acquired when the conditions below have been satisfied.? ● Nightly Recharge Data Acquisition Conditions Nightly Recharge data is acquired when there have been two days of sleep measurement data within the past 28 days, plus measurement data for the night prior to acquisition.? At least three days of sleep measurement data are required.? ● For example, to obtain "Nightly Recharge" for 4/30, you need to have sleep measurement data for the night of 4/29 (the night before 4/30), plus sleep measurement data for any two days from 4/3 to 4/28. ● Sleep Measurement Data Acquisition Conditions ・The watch worn the same way as you do during activity measurement.? https://support.casio.com/global/en/wat/manual/3554_en/UQIDSYtdetomij.html ・User-specified nighttime, bedtime, and rise time settings.? ・Sleep (from bedtime to wake up) of at least 4 hours.? ・Heart rate measurement turned on while sleeping.? ・Normal movement. Constantly moving or barely moving can make accurate data acquisition impossible.? ・Keeping the watch on your wrist. Wearing the watch only while sleeping and taking it off immediately after waking can make accurate data acquisition impossible.? Important! ● To improve sleep analysis accuracy, it takes about one to two hours after you wake up for sleep measurement results to be displayed by the watch.? ● Sleep measurement is based on body movements measured by the accelerometer and RRI (R-R interval) obtained from the heart rate sensor.? 　Accurate RRI (R-R interval) is not possible if the watch shifts on your wrist while you are sleeping, or if the sleeve of your clothing gets between the heart rate sensor and your wrist.? 　The main reason why sleep measurement results are not output is usually due to problems with how the watch is worn. If you wish to use the watch during sleep, try wearing it in the same way as you do while performing activity measurement.

What does battery life designate?

Battery life is the amount of time the watch will operate on a new battery, starting from when the battery is loaded in the watch. The battery life of a particular watch is a calculated value based on the usage conditions defined under the "Battery Life" item in the specifications in the watch's User's Guide. Because of this, the actual life of a particular battery may be longer or shorter than the specified battery life. Note that the battery in the watch when it is purchased is loaded at the factory for test purposes, and so it may not last the full specified battery life.

Why is the watch's EL backlight panel losing its brightness?

After long hours of use, the EL Panel used to illuminate the display may start to lose its brightness.

Why isn’t Nightly Recharge displayed (acquired)?

Nightly Recharge data is acquired when the conditions below have been satisfied.? ● Nightly Recharge Data Acquisition Conditions Nightly Recharge data is acquired when there have been two days of sleep measurement data within the past 28 days, plus measurement data for the night prior to acquisition.? At least three days of sleep measurement data are required.? ● For example, to obtain "Nightly Recharge" for 4/30, you need to have sleep measurement data for the night of 4/29 (the night before 4/30), plus sleep measurement data for any two days from 4/3 to 4/28. ● Sleep Measurement Data Acquisition Conditions ・The watch worn the same way as you do during activity measurement.? https://support.casio.com/global/en/wat/manual/3515_en/VPCVSYtgulxurw.html ・User-specified nighttime, bedtime, and rise time settings.? ・Sleep (from bedtime to wake up) of at least 4 hours.? ・Heart rate measurement turned on while sleeping.? ・Normal movement. Constantly moving or barely moving can make accurate data acquisition impossible.? ・Keeping the watch on your wrist. Wearing the watch only while sleeping and taking it off immediately after waking can make accurate data acquisition impossible.? Important! ● To improve sleep analysis accuracy, it takes about one to two hours after you wake up for sleep measurement results to be displayed by the watch.? ● Sleep measurement is based on body movements measured by the accelerometer and RRI (R-R interval) obtained from the heart rate sensor.? 　Accurate RRI (R-R interval) is not possible if the watch shifts on your wrist while you are sleeping, or if the sleeve of your clothing gets between the heart rate sensor and your wrist.? 　The main reason why sleep measurement results are not output is usually due to problems with how the watch is worn. If you wish to use the watch during sleep, try wearing it in the same way as you do while performing activity measurement.

What does the Full Auto Light feature do?

The Full Auto Light feature automatically illuminates the face of the watch whenever it is angled towards your face, but only in the dark or when surrounding light is dim. The face is not illuminated automatically while the Full Auto Light feature is turned off, or if your watch is not equipped with the Full Auto Light feature.

What is a test battery?

• The battery that comes loaded in your watch when you purchase it is used for function and performance testing at the factory. • The test battery may go dead quicker than the normally rated battery life as noted in the User’s Guide. Note that you will be charged for replacement of this battery, even if replacement is required within your watch's warranty period.

Why do display figures appear dim?

Display figures may appear dim and difficult to read when the display is viewed from an angle. Also, the figures on the display of the watch may start to become dim and difficult to read after long use.

Is the watch affected by high temperatures?

• Never leave your watch on the dashboard of a car, near a heater, or in any other location that is subject to very high temperatures. Do not leave your watch where it will be exposed to very low temperatures. Temperature extremes can cause your watch to lose or gain time, to stop, or otherwise malfunction. • Leaving your watch in an area hotter than +60°C for long periods can lead to problems with its LCD. The LCD may become difficult to read at temperatures lower than 0°C and greater than +40°C.

Is the watch affected by impact?

• Your watch is designed to withstand impact incurred during normal daily use and during light activity such as playing catch, tennis, etc. Dropping your watch or otherwise subjecting it to strong impact, however, can lead to malfunction. Note that watches with shock-resistant designs (G-SHOCK, Baby-G, G-ms) can be worn while operating a chain saw or engaging in other activities that generate strong vibration, or while engaging in strenuous sports activities (motocross, etc.)

What is Nightly Recharge?
What is sleep measurement?

● Nightly Recharge Nightly Recharge output is based on sleep measurement results (sleep analysis). It lets you check to what degree your body and mind recover, through sleep, from workouts and the load factors sustained throughout the day.? The results are also used to provide personalized tips to help you plan a healthy lifestyle and a training regimen to achieve your goals.? https://support.casio.com/global/en/wat/app/gbd-h2000/polar/nightly-recharge/ ● Sleep Measurement Sleep measurement displays the following items:? sleep time, bedtime, wakeup time, sleep stage, and sleep status. It lets you" check the quality of your sleep on a graph and tells you how long you slept.

What functions are restricted in the Airplane Mode?

GPS and Bluetooth functions are disabled.

Can I use the watch if I don't have a smartphone?

Yes. However, functionality is severely limited without a smartphone. For example, you will not be able to save activity history. Because of this, installation and use of the smartphone app are recommended.

Are you affected by magnetism? (GA-V01)

This model uses a magnetic holding structure that magnetically fixes the minute hand, so a magnet is used in the minute hand. Therefore, when the watch is exposed to magnetism, the minute hand may shift temporarily due to the magnetic influence. If you move the watch away from the magnetic object, it will return to its correct position within a few minutes. However, if exposed to more than a certain level of magnetism, it may not return to its correct position within a few minutes. In that case, the motor that moves the hands may be affected by magnetism, so you will need to correct the position of the hands. Please check the instruction manual for correcting the needle position. Other related questions Is the watch affected by magnetism?

The minute hand shakes due to shock or vibration. (GA-V01)

The structure of this model uses a magnetic holding structure that magnetically fixes the minute hand. It is a unique feature of this structure that the minute hand sways due to shock or vibration, and this swaying has the effect of repelling shocks received by the minute hand. Immediately after shock or vibration, the hands may become temporarily misaligned, but they will return to their correct positions within a few minutes. Other related questions Are you affected by magnetism? (GA-V01)

Can I use it without GPS?
Can I use it without a smartphone?

Functions will be limited, but usable.

Is the watch affected by electrostatic charge?

• Exposure to very strong electrostatic charge can cause your watch to display the wrong time. Very strong electrostatic charge even can damage electronic components. • Electrostatic charge can cause the display to go blank momentarily or cause a rainbow effect on the display.

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