Casio 3147 Altimeter, CHI, NYC, Note, Note, Problem, Receiving, Important, BER, ATH, HKG, Probable Cause, Receive failed, DEN, CHI, or NYC, Receive successful

Operation Guide 3147

Note

To turn auto receive on and off

• When a calibration time is reached, the watch will receive the calibration

signal only if it is in either the Timekeeping Mode or World Time Mode.

Reception is not performed if a calibration time is reached while you are

configuring settings.

• Auto receive of the calibration signal is designed to be performed early in

the morning, while you sleep (provided that the Timekeeping Mode time is

set correctly). Before going to bed for the night, remove the watch from your

wrist, and put it in a location where it can receive the signal easily.

• The watch receives the calibration signal for two to seven minutes everyday

when the time in the Timekeeping Mode reaches a calibration time. Do not

perform any button operation within seven minutes before or after the

calibration times. Doing so can interfere with correct calibration.

• Remember that reception of the calibration signal depends on the current

time in the Timekeeping Mode. The receive operation will be performed

whenever the display shows any one of the calibration times, regardless of

	l ll
	ll	l
			l
	l		l	ll
			ll
l l
l
l					l
l					l
l					l
l					l
				l
	ll		l
			l

On/Off status

1.In the Timekeeping Mode, press E to display the last successful receive time and date screen.

2.Hold down A until the current auto receive setting (ON or OFF) starts to flash. This is the setting screen.

•Note that the setting screen will not appear if the currently selected Home City is one that does not support time calibration reception.

3.Press E to toggle auto receive on (ON) and off (OFF).

4.Press A to exit the setting screen.

•For information about city codes that support signal receive, see “To specify your Home City”.

whether or not the displayed time actually is the correct time.

About the Signal Strength Indicator

The signal strength indicator shows the strength of the calibration signal being received. For best reception, be sure to keep the watch in a location where signal strength is strongest. The signal strength indicator is displayed while an auto or manual receive operation is in progress.

Signal strength indicator

lll
l	l
l		l
l l
l
	ll

Weak	Strong
	(Level 3)

•Even in an area where signal strength is strong, it takes about 10 seconds for signal reception to stabilize enough for the signal strength indicator to indicate signal strength.

•Use the signal strength indicator as a guide for checking signal strength and for finding the best location for the watch during signal receive operations.

•Following reception of the time calibration signal and calibration of the watch’s time setting, the Level 3 signal strength indicator will remain on the display in all modes. The Level 3 signal strength indicator will not be displayed if signal reception was unsuccessful or after you adjust the current time setting manually.

•The Level 3 signal strength indicator is displayed only when the watch is able to receive both time and date data successfully. It does not appear when only time data is received.

•The Level 3 signal strength indicator indicates that at least one of the auto calibration signal receive operations was successful. Note, however, that the Level 3 signal strength indicator disappears from the display each day when the first auto receive operation of the day is performed.

To perform manual receive

To check the latest signal reception results

Press E to view the last successful receive time and date. Press E again to return to the previous screen.

Signal Reception Troubleshooting

Check the following points whenever you experience problems with signal reception.

Problem	Probable Cause	What you should do
Cannot perform •The watch is not in the Receive		• Enter the Receive
manual receive.	Mode.	Mode and try again.
	•Your current Home City is not one • Select LON, PAR,
	of the following: LON, PAR, BER,	BER, ATH, HKG,
	ATH, HKG, TPE, TYO, LAX,	TPE, TYO, LAX, DEN,
	DEN, CHI, or NYC	CHI, or NYC as your
		Home City.
Auto receive is •You changed the time setting		• Perform manual signal
turned on, but	manually.	receive or wait until the
the Level 3	•The DST setting was changed	next auto signal
signal strength	manually in the World Time Mode.	receive operation is
indicator does •You pressed a button while signal		performed.
not appear on	receive was in progress.	• Check to make sure
the display.	•Even if receive is successful, the	the watch is in a
	Level 3 signal strength indicator	location where it can
	disappears from the display each	receive the signal.
	day when the first auto receive
	operation of the day is performed.
	•Time data (hour, minutes,
	seconds) only was received
	during the last receive operation.
	The Level 3 signal strength
	indicator appears only when time
	data and date data (year, month,

Receiving

lll
l	l
l	l
l
l l
	ll

Receive successfulReceive failed

If there was a previously successful reception

1.In the Timekeeping Mode, press E to display the last successful receive time and date screen.

2.Press E to enter the Receive Mode.

3.Hold down E for about two seconds until starts to flash on the display.

•Time calibration signal reception takes from two to seven minutes. Take care that you do not perform any button operations or move the watch during this time.

•If the receive operation is successful, the reception date and time appear on the display, along with the GET indicator.

4.After manual receive is complete, press E

twice to return to the Timekeeping mode.

•The watch also will exit the Receive Mode if you do not perform any button operation for about one or two minutes.

•If the latest reception fails but a previous reception was successful, an indicator () will be on the display.

The watch will enter the Receive Mode without changing the time setting if you press E or if you do not perform any button operation for about one or two minutes.

Note

•To interrupt a receive operation and return to the Receive Mode, press E.

	day) are both received.
Time setting is	•If the time is one hour off, the	• Change the DST
incorrect	DST setting may be incorrect.	setting to Auto DST.
following signal	•The Home City code setting is	• Select the correct
reception.	not correct for the area where you	Home City code.
	are using the watch.

•For further information, see “Important!” under “Time Calibration Signal Reception” and “Radio-controlled Atomic Timekeeping Precautions”.

Altimeter

The watch’s altimeter uses a pressure sensor to detect current air pressure, which is then used to estimate the current altitude based on ISA (International Standard Atmosphere) preset values. You can specify a reference altitude, which the watch will use to calculate your current altitude based on the value you specify. Altimeter functions also include storage of measurement readings in memory.

Important!

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

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

• The semiconductor pressure sensor used by the watch for altitude readings

is also affected by temperature. When taking altitude readings, make sure

the watch is not subjected to temperature changes.

• To avoid the effect of sudden temperature changes during readings, keep

the watch on your wrist in direct contact with your skin.

• Do not rely upon this watch for altitude readings or perform button

operations while sky diving, hang gliding, or paragliding, while riding a

gyrocopter, glider, or any other aircraft, or while engaging in any other

activity where there is the chance of sudden altitude changes.

• Do not use this watch for taking altitude readings in applications that

demand professional or industrial level precision.

• Remember that the air inside of a commercial aircraft is pressurized.

If no reception was successful

Because of this, the readings produced by this watch will not match the

altitude readings announced or indicated the flight crew.

3