Table of Contents
- Component Identification
- Charging your watch
- Adjusting the time
- Adjusting the calendar
- Using the chronograph
- Download Full Instructions & Specifications
- Models using B620
*The illustration above may differ from the actual appearance of your watch.
Charging your watch
This watch has a rechargeable cell which is charged by exposing the dial to light, such as direct sunlight or fluorescent lamps.
After taking off the watch, put it in a location where the dial is exposed to bright light, such as by a window.
For optimal performance, be sure to:
- Do not charge the watch at high temperature (about 60ºC (140ºF) or higher).
- If the watch is obscured from light by long sleeves frequently, supplemental charging may be needed to ensure continual operation.
Low Charge Warning
When the power reserve becomes low, the second hand moves once every two seconds. This is the low charge warning function. Be sure to fully charge your watch.
- The time and date will continue to be displayed when the watch is in low power mode. However chronograph features will not be available for use until the watch has been recharged.
Charging time by environment
Below are the approximate times required for charging when exposing the watch dial to light continuously. Please use the table below as a reference only.
|Environment||Illuminance (lx)||Charging time (approx.)|
|To work for one day||To start working normally when the cell is discharged||To become fully charged when the cell is discharged|
|Outdoors (sunny)||100,000||2 minutes||50 minutes||9 hours|
|Outdoors (cloudy)||10,000||10 minutes||7 hours||60 hours|
|20cm (8 inches) away from a fluorescent lamp (30W)||3,000||35 minutes||25 hours||180 hours|
|Interior lighting||500||3.5 hours||160 hours||-|
Adjusting the time
Pull the crown out to position 2 when the second hand points to 0 second.
All the hands stop.
When using chronograph, the chronograph is reset and 1/5 chronograph second hand returns to 0 second.
Rotate the crown to adjust the time.
The 24-hour hand also moves. Pay particular attention to the hand to ensure AM or PM time is set properly.
When the watch shows around 12:00 AM, the date indicator starts to change.
The date indicator does not change by rotating the crown counterclockwise.
Push the crown in to position 0 in accordance with a reliable time source to finish the procedure.
Adjusting the calendar
Adjust the date indication on the first days of March, May, July, October and December.
When the time on the watch is between 9:00 PM and 1:00 AM, do not execute the adjustment. Otherwise the date indication may change improperly.
|Pull the crown out to position 1.|
|Push the crown in to position 0 to finish the procedure.|
Using the chronograph
The 60 minute chronograph can indicate a maximum of 59' 59.8".
- After one hour of continuous chronograph operation, the chronograph automatically stops.
- The current time is shown while the chronograph works.
- If the watch is in low power mode (the second hand moving once every two seconds), you can not use the chronograph.
Correcting the reference position of the 1/5 chronograph second hand
Do the following procedure when 1/5 chronograph second hand does not return to 0 second by resetting the chronograph.
Pull the crown out to position 2.
All the hands stop.
|Press and hold button B for two seconds.|
Adjust 1/5 chronograph hand to 0 second by pressing button B repeatedly.
Push the crown in to position 0.
Press button A
Download Full Instructions & Specifications
The full PDF manual and specifications can be downloaded here.
Eco-Drive Caliber B620 powers the following models.