User Manual for Miyota Cal. 0S80 Watch Movement

Quick guide from the manual

This document provides instructions for the Miyota Cal. 0S80 chronograph watch movement. Key functions include time and date setting, alarm operation, and chronograph measurement up to 11 hours, 59 minutes, 59 seconds, and 95/100ths. If the chronograph hands do not return to zero, a specific reset procedure is required.

Displays and Buttons

The watch features a crown with three positions (Normal, 1st click, 2nd click) and three buttons (A, B, and C). The face includes hands for hours, minutes, alarm time, and chronograph functions (seconds, minutes, and 1/20 seconds).

Setting the Time

1. Pull the crown out to the 2nd position.
2. Turn the crown to set the hour and minute hands.
3. Push the crown back to the normal position to start the small second hand.

Setting the Date

1. Pull the crown out to the 1st position.
2. Turn the crown counter-clockwise to set the date.
3. Push the crown back to the normal position.

Note: Do not set the date between 9:00 PM and 1:00 AM, as the date may not change correctly on the following day.

Using the Alarm

Setting the alarm time:

1. Pull the crown out to the 1st position.
2. Turn the crown clockwise to set the alarm time indicator to the desired time.
3. Return the crown to the normal position.
4. Pull out button C to turn the alarm on.

Operation:

• Alarm ON: Button C pulled out to the 1st position.
• Alarm OFF: Button C returned to the normal position.
• Turning off while sounding: Press button C to return it to the normal position.

The alarm sounds for 15 seconds, stops for 2 minutes and 45 seconds, and repeats this cycle several times.

Using the Chronograph

1. Press button B to enter chronograph mode. The small second hand will stop and switch to the 1/20 second hand.
2. Press button A to start or stop the chronograph.
3. Press button B to reset the chronograph and return all hands to the zero position.

Chronograph Reset

Perform this procedure if the chronograph hands do not return to zero, or after replacing the battery:

1. Pull the crown out to the 2nd position.
2. Press button A to set the chronograph second hand to zero.
3. Press button B to set the chronograph 1/20 second hand to zero. (Hold button A or B to advance hands rapidly).
4. Return the crown to the normal position.
5. Press button B to verify the hands are reset.