Citizen E31 User Manual

Features

Solar-powered and no battery replacement (→page 9)

English

The date window—	The calendar—no date correction
large and highly visible	at the end of months (→page 13)

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Table of contents
Part names and their main functions ..............................................................	4
How to use the screw down crown ......................................................................	5
When leaving the watch unused for an extended period of time ....................	5
Charging the battery ..........................................................................................	6
Charging the battery ..............................................................................................	6
When the battery becomes short of power
—Insufficient charge warning function ...........................................................	7
Charging time .........................................................................................................	8
After the battery is fully charged
—Overcharge prevention function...................................................................	9
Eco-Drive ................................................................................................................	9
Setting the time.................................................................................................	10
Checking the date, month, and year .............................................................	12
Perpetual calendar................................................................................................	13
Setting the year, month, and date .................................................................	14
Precautions.........................................................................................................	22

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Troubleshooting..............................................................................................

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•The second hand moves only once every two seconds.

•All hands stop moving.

•The figures are not displayed upright.

•The date is wrong.

•The date changes to the following day at around noon.

•The watch does not work properly.

•The watch does not move even if the battery is fully charged.

Checking and correcting the reference position.........................................	32
Resetting the watch ..........................................................................................	36
Maintenance.......................................................................................................	38
Specifications .....................................................................................................	39

English

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Part names and their main functions

Date

Hour hand

24-hour hand:

Goes around once a day

Second hand

Minute hand

Button B:

For setting the

calendar-related functions

Crown:

For setting the time, checking the date, etc.

Button A:

For setting the date etc.

Example of a button

Press HERE.

The illustrations in this instruction manual may differ from the actual appearance of your watch.

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7 How to use the screw down crown

To release the crown

Turn the crown to the left until it pops out slightly.

To lock again

Tighten the crown completely by pressing and turning it to right.

7 When leaving the watch unused for an extended period of time

Pull out the crown to position .

All hands stop moving and the battery power is saved.

• The date will change to the following day every 24 hours once you have pulled out the crown to position .

English

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Charging the battery

7 Charging the battery

This watch has a battery which is charged by exposing the dial to light such as direct sunlight or fluorescent lamps.

To obtain the best performance:

•Expose the dial to direct sunlight at least once a month.

•After taking off the watch, put it where the dial is exposed to bright light, such as by a window.

•Before storing the watch in a dark place for an extended period of time, fully charge the battery.

When the watch is covered with long sleeves, for example, the battery may not be charged sufficiently. Try to keep the watch exposed to light.

Do not charge the battery at a high temperature (about 60˚C/140˚F or higher).

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7 When the battery becomes short of power—Insufficient charge warning function

When the battery becomes short of power, the second hand moves once every two seconds—insufficient charge warning function. Charge the battery by exposing the dial to light.

English

The two-second interval movement

•After the battery is charged for a while, the second hand will move normally.

•If you have not charged the battery for three days or more since the warning movement began, the battery will run out and the watch will stop.

NOTICE:

You cannot check or adjust the settings while the warning movement continues, though you can see the time.

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Charging the battery

7 Charging time

Below are the approximate values when exposing to the light continuously. The charging time differs depending on the color of dial or other conditions. Use the table below only for your reference.

Illuminance		Charging time to	Charging time to start
	Environment	work for one day	working normally when the
(Lx)		(approx.)	battery is empty (approx.)
500	Interior lighting	4 hours	60 hours
1,000	60-70 cm (24-28 in.) under a	2 hours	25 hours
	fluorescent lamp (30 W)
3,000	20 cm (8 in.) under a fluorescent	40 minutes	7.5 hours
	lamp (30 W)
10,000	Under cloudy weather	11 minutes	2.5 hours
100,000	Under direct sunlight in summer	2 minutes	45 minutes
Battery duration after full charging (without further charging)			About 12 months

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	7 After the battery is fully charged—
	Overcharge prevention function
	After the battery is fully charged, charging
	automatically stops to prevent overcharging, which
	may damage to the battery, or affect the accuracy,
Time for charging fully
when the battery is	functions, and performance of the watch.
empty (approx.)

—Eco-Drive

—This watch has the ”Eco-Drive” system, which converts light into electrical energy with the solar cell

—

beneath the dial.

The system makes you free from care of battery

70 hours replacement and is environment-friendly because of

no battery disposal.

35 hours

English

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Setting the time

Date window

Second hand

24-hour hand

1.Pull out the crown to position.

All hands stop moving.

•To set the time accurately, pull out the crown when the second hand is at the 0-second position.

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2.Turn the crown to set the time.

All hands other than the second hand will move.

• Take care of the position of the 24-hour hand to set A.M. or P.M. correctly.

• When you set the hands to around midnight, the date will change to the following day. To return to the previous day, set the hands to any position before 23:30.

Go to step 3 after the date has completely stopped.

3.Push in the crown to position .

The watch starts moving.

• To set the time accurately, push in the crown by the time signal.

English

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Checking the date, month, and year

You can check the date, month, and year*1.

Date window

Button A

	The crown	The button
	position	operation
	To check a	—
	date
	To check a	—
	month
	To check an	Pressing
	year	button A*2

*1 This watch shows the number of years passed since the last leap year.

*2 Each time you press button A while the crown is set to position , you can display the month and year alternately.

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