CITIZEN 8635 Watch User Manual
- June 17, 2024
- Citizen
Table of Contents
CITIZEN 8635 Watch
Product Information
Specifications
- Model: Eco-Drive (solar-powered) watch
- Power Source: Rechargeable cell charged by exposing the dial to light
- Battery Life: Approximately 6 months when fully charged
- Insufficient Charge Warning: Second-hand advances at 2-second intervals
- Overcharging Prevention Function: Automatically activates when fully charged
Product Usage Instructions
Charging the Watch
To charge your watch, follow these steps:
- Expose the dial to direct sunlight or fluorescent lamps to charge the rechargeable cell.
- Ensure the watch is fully charged before initial use.
- If the power becomes very low, the second hand will advance at 2-second intervals, indicating that charging is necessary.
- When the second-hand starts to advance at 2-second intervals, expose the watch to light until it is fully charged.
- If the watch is not exposed to light within approximately 4 days after the insufficient charge warning starts, the watch will stop.
Quick Start Function
If your watch has stopped, you can use the quick start function to immediately
start operating it again. Follow these steps:
- Expose the stopped watch to light.
- The watch will start operating again immediately.
- After quick start, expose the watch to light until it is fully charged.
- Set the correct time before using the watch.
Setting the Time and Calendar
Follow these steps to set the time and calendar on your watch:
- Pull out the crown to position 2.
- With the second hand in the 0-second position, set the day by rotating the crown to the right (clockwise).
- Rotate the crown to set the time, paying attention to a.m. and p.m.
- Return the crown to the normal position (0) in sync with a reliable time source.
- To set the date, pull out the crown to position 1.
- Rotate the crown to the left (counterclockwise) to set the date.
- Return the crown to its original position.
Name of Components
The following components are present on your watch:
- Minute hand
- Hour hand
- Day hand
- Second hand
- Date hand
- Crown (with normal, position 1, and position 2)
About the Crown
Some models use a screw-down system for the crown. Follow these steps to
operate the crown:
- To prevent accidental operations, lock the crown by pressing it and rotating it to the right (clockwise) until it tightens the screw lock.
- To unlock the crown, press it and rotate it to the left (counterclockwise).
FAQ
-
Q: How long does the watch function when fully charged?
A: The watch functions for approximately 6 months when fully charged. -
Q: What happens if the watch is not exposed to light after the insufficient charge warning?
A: If the watch is not exposed to light within approximately 4 days after the insufficient charge warning starts, the watch will stop. -
Q: Can I overcharge the watch?
A: No, the watch has an overcharging prevention function that automatically activates when it is fully charged, ensuring it is not charged any further.
Notes Before Use
Notes on charging your watch
This watch has a rechargeable cell that is charged by exposing the dial to
light such as direct sunlight or fluorescent lamps.
For optimal performance
- Expose the watch with the dial towards direct sunlight for several hours at least once a month.
- After taking off the watch, put it in a position so that the dial is exposed to bright light, such as by a window.
- Before storing the watch in a dark place for an extended period, be sure to charge it fully.
When the watch is regularly covered with long sleeves, it may not be charged sufficiently. Try to keep the watch exposed to light sufficient for charging. Do not charge the watch at a high temperature (about 60°C/140°F or higher).
Your Watch
Eco-Drive (solar-powered) watch
The watch operates by converting sunlight and other light into electrical
energy. Once the rechargeable cell is fully charged, the watch will function
for approximately 6 months.
Insufficient charge warning
If the power becomes very low, the second-hand advances at 2-second intervals,
indicating that charging is necessary. When the second-hand starts to advance
at 2-second intervals, expose the watch to light until it is fully charged.
If the watch is not exposed to light within approximately 4 days after the
insufficient charge warning starts, the watch will stop.
Quick start function
When the stopped watch is exposed to light, it starts operating again
immediately.
After quick start, expose the watch to light until it is fully charged. Set
the correct time before using the watch.
Overcharging prevention function
Once the watch is fully charged, an overcharging prevention function will
automatically activate so that it is not charged any further. No matter how
much the watch is charged, it will not affect the rechargeable cell, time
accuracy, functions or other performance.
Name of Components
The illustrations shown in this manual may differ from the actual watch you have purchased.
About the crown
Some models use screw-down system for the crown. Accidental operations can be
prevented when the watch is not being operated by locking the crown. To
operate the watch, release the lock.
-
Before operation
- Unlock the crown
Rotate the crown to the left (counterclockwise).
When the screw lock is released, the crown extends to the normal position.
- Unlock the crown
-
After operation
- Lock the crown
Press the crown and rotate it to the right (clockwise) to tighten the screw lock.
- Lock the crown
Setting the Time and Calendar
-
Setting the time and day
The day hand advances together with the hour hand and minute hand, so set the day first, and then set the time.
-
Setting the date
About the screw-down crown
Release the screw lock before rotating the crown to set the time and calendar.
After setting the time and calendar, be sure to press and rotate the crown to
tighten the screw lock (p.7). If your watch does not have a screw down crown,
operations can be performed without locking or unlocking the crown.
-
Setting the day
The day hand moves when the hour hand is indicating between 0 a.m. and 5 a.m. Pay attention to a.m. and p.m. when setting the time. -
Setting the date
Do not change the date while the hour hand is indicating between 9 p.m. and 1 a.m. If you change the date during this time, the date may not change the following day.
Setting the time
- When setting the time, determine a.m. and p.m. by the period when the day hand moves.
- Advance the minute hand by 4 or 5 minutes past the correct time, and then return it to the correct time to set the time more accurately.
Setting the date
The date has a 31-day cycle. Re-set the correct date at the start of March,
May, July, October and December.
Troubleshooting
Precautions
WARNING
Water-resistance performance
- There are several types of water-resistant watches, as shown in the following table. The unit “bar” is roughly equal to 1 atmosphere.
- For correct use within the design limits of the watch, confirm the level of water resistance of your watch, as indicated on the dial and case, and consult the table.
CAUTION Keep your watch clean
- Leaving dust and dirt deposited between the case and the crown may result in difficulty in pulling the crown out. Rotate the crown while in its normal position, from time to time, to loosen dust and dirt and then brush it off.
- Dust and dirt tend to be deposited in gaps in the back of the case or band. Deposited dust and dirt may cause corrosion and soil your clothing. Clean the watch occasionally.
Cleaning the Watch
- Use a soft cloth to wipe off dirt, perspiration and water from the case and crystal.
- Use a soft, dry cloth to wipe off perspiration and dirt from the leather band.
- To clean a metal, plastic, or rubber watchband, wash away dirt with mild soap and water. Use a soft brush to remove dust and dirt jammed in the gaps in the metal band. If your watch is not water-resistant, take it to your dealer.
Note: Avoid using solvents (thinner, benzine, etc.), as they may damage the finish.
CAUTION Operating environment
- Use the watch within the operating temperature range specified in the instruction manual. Using the watch where temperatures are outside the specified range, may result in deterioration of functions or even stoppage of the watch.
- Do NOT use the watch in places where it is exposed to high temperatures, such as in a sauna. Doing so may result in a skin burn.
- Do NOT leave the watch in a place where it is exposed to high temperature, such as the glove compartment or dashboard of a car. Doing so may result in the deterioration of the watch, such as the deformation of plastic parts.
- Do NOT place the watch close to a magnet. Timekeeping will become inaccurate if you place the watch close to magnetic health equipment such as a magnetic necklace or a magnetic latch of a refrigerator door or handbag clasp or the earphones of a mobile phone. If this has occurred, move the watch away from the magnet and reset the time.
- Do NOT place the watch close to household appliances that generate static electricity. Timekeeping may become inaccurate if the watch is exposed to strong static electricity, such as is emitted from a TV screen.
- Do NOT subject the watch to a strong shock such as dropping it onto a hard floor.
- Avoid using the watch in an environment where it may be exposed to chemicals or corrosive gases. If solvents, such as thinner and benzine, or substances containing such solvents come in contact with the watch, discoloration, melting, cracking, etc. may result. If the watch comes in contact with mercury used in thermometers, the case, band or other parts may become discolored.
Periodical inspections
Your watch needs inspection once in every two or three years for safety and
long use. To keep your watch water-resistant, the packing needs to be replaced
regularly. Other parts need to be inspected and replaced if necessary. Ask for
Citizen genuine parts upon replacement.
WARNING Handling the rechargeable cell
- Do not remove the rechargeable cell from the watch yourself. If you must remove the cell, store it out of reach of children to avoid accidental ingestion.
- If the rechargeable cell is ingested, consult a doctor immediately.
- Do not throw away with regular trash. Please follow your local government disposal regulations to prevent the risk of fire or environmental contaminations.
WARNING Do not use anything other than the specified rechargeable cell.
- The watch will not operate if incorrect battery types are inserted.
- Never use a regular silver battery. The battery could overcharge during the charging process and burst, causing damage to the watch or injuries to the wearer.
CAUTION Charging precautions
- Do not charge the watch in a high-temperature environment (about 60°C/140°F or more). Overheating while charging can cause the watch exterior to become discolored, the watch to deform or the movement to be damaged. Example)
- Charging close to incandescent lighting, halogen lamps, or other lighting sources that easily become hot.
- Charging on surfaces that can easily become hot, such as a car dashboard.
- When charging with incandescent lighting, halogen lamps, or other lighting sources that easily become hot, place the watch at least 50 cm (20 in.) away from the source to avoid overheating.
Specifications
- Cal. No.: 8635
- Type: Analogue solar powered watch
- Time accuracy: Average monthly deviation: ±15 seconds (When used at normal temperature (+5°C to +35°C/+41°F to +95°F))
- Operational temperature range: –10°C to +60°C/+14°F to +140°F
- Display functions: Time: Hour, minute and second
- Calendar: date, day
- Additional functions: Calendar function Insufficient charge warning function (second hand 2-second movement interval) Quick start function Overcharging prevention function
- Operation time: Time until stop from full charged status without additional charging: Approx. 6 months
- Time until stop from activation of insufficient charge warning function: Approx. 4 days
- Battery: Rechargeable cell 1 pc.