Citizen H990 Eco-Drive Satellite Wave User manual

1
Thank you for your purchase of this Citizen watch.
Before using the watch, read this instruction manual carefully to ensure
correct use.
After reading, be sure to store this manual in a safe place should it be
needed for future reference.
The model name of this watch is “H990” (Eco-Drive Satellite Wave).

2
Safety precautions
This manual may contain certain safety advisories. Your watch should be used in
accordance with these advisories at all times to ensure optimal enjoyment of your
watch and to prevent injury to yourself, other persons and/or damage to property.
■ Safety advisories are categorized and depicted in this manual as follows:
DANGER Highly likely to cause death or serious injury
WARNING May cause serious injury or death
CAUTION May or will cause minor or moderate injury or damage
■ Important instructions are categorized and depicted in this manual as follows:
Warning (caution) symbol followed by instructions that should
be followed and/or precautions that should be observed.
Warning (caution) symbol followed by prohibited use and/or
operation advisory.

3
<Notes before use>
Case
Be careful not to knock or inflict strong shocks on the watch as part
of the case is ceramic.
Protective stickers
Prior to the watch being shipped from the manufacturing plant, its glass, case,
metal band, and metal parts of the clasp are covered with stickers to protect them
from getting fingerprints or scratches during transit from the plant to the store.
If the watch is worn without first removing these stickers, perspiration or moisture
may enter the gaps between the protective stickers and the parts, which may result
in a skin rash and/or corrosion of the metal parts.
For this reason, please be sure to peel off the stickers before wearing the watch.

4
Before using the watch
The following must be done before using the watch:
●Checking the power reserve Page 14
Check the charge level of the watch.
●Setting the World Time Page 17
Select the city or time difference for which you want to indicate the time and
date.
●Receiving the satellite time signal Page 28
Correct the time by receiving the satellite time signal.

5
This watch has a rechargeable cell which is
charged by exposing the dial to light.
Expose the dial to direct sunlight regularly to
charge the watch.
For details of charging, see pages 10 to 13.

6
Before using the watch..............4
Component identification..........8
Recharging your watch............ 10
Checking the power reserve..... 14
Using the world time function ... 16
Switching Summer Time and
standard time ...................... 21
Before receiving the satellite time
signal................................... 24
Table of contents
Receiving the satellite time
signal................................... 28
Checking and adjusting
the leap second .................... 35
Checking and adjusting the
rollover number ................... 38
Adjusting the time/calendar
manually.............................. 42
Checking and correcting the
current reference position..... 46

7
Troubleshooting...................... 50
Resetting the watch
—All Reset .......................... 55
Eco-Drive (solar powered) Watch
Handling Precautions ........... 58
Water resistance ..................... 62
Precautions and usage
limitations ........................... 65
Maintenance........................... 70
Information ............................ 71
Specifications.......................... 72

8
Component identification
Date indication
Upper right
button ( )
Lower right
button ( )
Crown
Hour hand
Reception result
indication (OK/NO)
Reception-in-progress
indication (RX)
Second hand
City indication
Minute hand
24-hour indication
Function indication
• Day of the week
• Summer time indication
(ON/OFF)

9
Part of the case is ceramic. Handle with care.
The illustrations in this instruction manual may differ from the actual appearance of
your watch.
Component identification
Ceramic

10
This watch can store electrical energy generated from direct
sunlight or light from a fluorescent lamp shining on the dial
in the built-in rechargeable cell.
After taking off the watch, put it in a location where the dial is
exposed to bright light, such as by a window.
Caution
• Since a large amount of power is consumed when receiving the satellite
time signal, this watch is equipped with a high capacity rechargeable cell.
Therefore, it may take a while to sufficiently charge the watch.
• To ensure comfortable use, charge the watch for 5 or 6 hours every two
weeks.
• Avoid leaving the watch in dark places where it cannot be exposed to light
for long periods of time.
• If the watch is covered by long sleeves it may not be charged sufficiently.
Ensure that the watch is exposed to light suitable for charging.
Recharging your watch

11
Recharging your watch
When the watch reaches a low charge state—insufficient charge warning
function
When the power reserve becomes low, the second
hand moves once every two seconds—This is the
insufficient charge warning function. Charge the watch
by exposing the dial to light.
• When the watch is sufficiently charged, the second
hand will move normally.
• If you do not charge the watch for 10 days after the
insufficient charge warning movement has begun,
the watch will run out of power and stop.
Even when the second hand moves once every two seconds, the current time and
date are indicated, and you can adjust the time and date. However, satellite time
signal reception and other operations are not possible.

12
Charging time by environment
Below are the approximate times required for charging when exposing the watch
dial to light continuously. Please use this table as a reference only.
Environment Illuminance (Lx)
Charging time for the
second hand to move
normally for one day
Charging time for
the second hand
to start moving
normally when the
rechargeable cell is
empty
Charging time for
the rechargeable
cell to become fully
charged when the
rechargeable cell is
empty
Outdoor (Under direct
sunlight) 100 000 8 minutes 16 hours 150 hours
Outdoor (Cloudy weather) 10 000 25 minutes 45 hours 390 hours
20 cm (7-7/8 inches) away
from a fluorescent lamp
(30 W)
3 000 1.5 hours 160 hours 1,360 hours
Interior lighting 500 8 hours ——
Recharging your watch

13
• To charge the rechargeable cell, it is recommended to expose the dial to
direct sunlight. A fluorescent lamp or interior lighting does not have sufficient
illumination to charge the rechargeable cell.
• When fully charged, the overcharging prevention function works automatically.
The accuracy or parts of the watch will not be affected by extra charging.
Caution: This watch uses a special rechargeable cell.
• If the surrounding temperature falls below 0°C/32°F or exceeds 40°C/104°F,
the “Charge suspension temperature detection function” will activate and
charging will not be possible.
• If you do not charge the watch for 60 days after it has stopped, the “Over
discharge detection function” will activate and charging will not be possible.
If the watch does not work even after charging for more than one day under
direct sunlight, request replacement of the rechargeable cell.
Run time
Fully charged to fully discharged: Approximately 2.5 years
(When receiving the satellite time signal once every two days)
Power reserve upon insufficient charge warning function (page 11): 10 days
Recharging your watch

14
Checking the power reserve
Check the charge level of the watch and be sure to
maintain a sufficient amount of charge.
1. Ensure that the crown is in position .
2. Press the lower right button briefly.
The second hand moves to indicate the power reserve.
The second hand rotates
clockwise, then indicates “OK”
or “NO”
The watch is
sufficiently
charged.
The second hand rotates
counterclockwise, then indicates
“OK” or “NO”
The charge of the
watch is low.
Charge the watch.
See pages 10 to 13.

15
• “OK” and “NO” indicate the satellite time signal reception result. They have
no relation to the charge level.
3. Press the lower right button briefly to finish the procedure.
The current time is indicated.
• The current time will be indicated automatically after 10 seconds even
without pressing the button.
Checking the power reserve

16
Check the current world time (city) setting.
1. Ensure that the crown is in position .
2. Press the upper right button briefly.
The second hand indicates the city currently selected.
3. Press the upper right button briefly to finish
the procedure.
• The current time is indicated automatically after 10
seconds even without pressing the button.
Using the world time function
Confirming the world time
When "New York" (49 seconds
position) is selected

17
Select the city for which you want to indicate the time and
date.
1. Pull the crown out to position .
2. Rotate the crown to select the city for which you
want to indicate the time and date.
• For details of the selection of cities, see pages 18 to
20.
• Each time you select a city, the time and date of the
city you have selected will be indicated.
3. Push the crown in to position to finish the
procedure.
After setting the World Time, check the displayed time—Summer Time or
standard time. (See pages 21 to 23.)
Using the world time function
Setting the World Time

18
Using the world time function
Table of selectable cities
• The indications in the table below are written differently on some models.
• When you use the watch in a place which is not shown in the table below, select
the city in the same time zone as the city you want to indicate.
• The time difference in the table below is based on UTC.
• The standard time for each area or country may change according to their
situation.
City indication Second hand position Typical city Time difference
LON 0 London 0
PAR 2 Paris +1
ATH 4 Athens +2
RUH 7 Riyadh +3
DXB 9 Dubai +4
KHI 11 Karachi +5
DEL 14 Delhi +5.5
DAC 16 Dhaka +6