Citizen F100 - Watch Manual

Component identification

Receiving the satellite time signal

Manual reception 1 (time required: 3 to 20 seconds)
Outdoor signal reception is recommended for receiving satellite time signal.

1. Push the crown in to position .
2. Press and hold the lower right button until the second hand points to "RX".
   The previous reception result is first indicated and signal reception starts. After finishing reception, the second hand indicates the reception result for 2 seconds and returns to normal movement.

Manual reception 2 (21 to 13 seconds)
Reception to adjust the time and calendar when the leap second has been updated.

1. Push the crown in to position .
2. Press and hold the lower right button for 7 seconds.
   Time reception starts after the second hand points "RX" once and turns fully around to point "RX" again.

Checking the previous reception result of the satellite signal

1. Push the crown in to position .
2. Press and release the lower right button .
   The previous reception result is indicated.

3. Press and release the button to finish checking.

Using the world time

Setting the world time

1. Pull the crown out to position 1.
   The second hand indicates the current time zone and the function hand indicates the summer time setting.
2. Rotate the crown to choose a time zone.
   Time indication changes.
   • See also "How to read indication of the world time setting" and "Table of time zones and representative places".
3. Push the crown in to position to finish the procedure.
   The function hand returns to day indication.

How to read indication of the world time setting

The watch has 40 time zone markers with several representative area names. A time zone is set by pointing the second hand at one of the markers.
On the illustration, the second hand points to 28 seconds and time zone setting is "+11.5".

• Time zones are represented by offsets from UTC (Coordinated Universal Time).

Table of time zones and representative places

Setting leap second

1. Pull the crown out to position .
2. Press and release the upper right button .
   Using the "0:00:00" position as the starting point, the minute and second hands indicate the leap second setting.

   When the leap second setting is "-35 seconds"	When the leap second setting is "-65 seconds"
   The hands point to "0 minute 35 seconds".	The hands point to "1 minute 5 seconds".

   Turn the crown to adjust the setting if the leap second is not correct.
3. Push the crown in to position to finish the procedure.

Adjusting the time and calendar manually

1. Pull the crown out to position .
2. Press and hold the upper right button until the second hand points to 30 seconds.
3. Pull the crown out to position .
   The hands point to 0 second.
4. Press and release the lower right button repeatedly to change the hand/indication to be corrected.
   • Each time you press the button , the target changes as follows.
     Minute hand → hour hand → date → year/month → day → (back to the top)

• Rotate the crown to adjust the hand/indication.
  • Date indication changes to the next as the function hand rotates 5 times.
  • When you rotate the crown quickly a few times, the hand/indication will move continuously.
  • To stop the rapid movement, rotate the crown in either direction.
• Push the crown in to position in accordance with a reliable time source to finish the procedure.

Month and year indications
Set the year and month with the position of the second hand.
"Month" corresponds to one of the 12 zones shown in the figure below. Each number means month.

"Year" corresponds to the years since leap year and is indicated with markers in the zone of each month.

Checking the power reserve and power generation amount

1. Push the crown in to position .
2. Press and release the upper right button .
   The power reserve and power generation amount at the moment of pressing the button Ⓑ are indicated in levels.

Indication of power reserve in level

Level	4	3	2	1	0
Power reserve level scale
Duration (approx.)	24 - 20 months	20 - 14 months	14 - 5 months	5 months - 5 days	5 days or shorter
Meaning	Power reserve is sufficient.	Power reserve is OK.		Power reserve is getting low.	Insufficient charge warning has started.
	OK for normal use			Charge immediately.

Indication of power generation amount in level
The level of power generation amount means power being generated by the solar cell represented in 0 to 6 levels.

Level	6	5	4	3	2	1	0
Indication
Meaning	Sufficient power generation for charging.		Charge in a brighter location where the level of power generation amount reaches "5" or "6".

3. Press and release the upper right button to finish checking.

Checking the reference position

1. Push the crown in to position .
2. Press and hold the upper right button for 7 seconds.
   Correct reference positions:
   • All hands: 12 o'clock position
   • Date indication: midway between 31 and 1
   • Day: S (Sunday)
3. Press and release the upper right button to finish checking.

Correcting the reference position

1. Push the crown in to position .
2. Press and hold the upper right button for 7 seconds.
3. Pull the crown out to position .
4. Press and release the lower right button repeatedly to change hand/indication to be corrected.
   • Each time you press the button , the target changes as follows.
     Date/day → hour hand → minute hand → second hand → (back to the top)
5. Rotate the crown to adjust the hand/indication.
   • When you rotate the crown quickly a few times, the hand/indication will move continuously.
   • To stop the rapid movement, rotate the crown in either direction.
6. Push the crown in to position .
7. Press and release the button to finish checking.

Resetting the watch — All Reset

1. Pull the crown out to position .
2. Press and hold buttons and at the same time for 3 seconds or more and release them.
   As you release the buttons, the hands move slightly to indicate that reset completed.

After All Reset
After All Reset, adjust the reference position. Execute world time setting and receive satellite signal manually to adjust the time and calendar after that.