MIYOTA OS30 Watch Movement Instruction Manual

June 9, 2024
MIYOTA

OS30 Watch Movement
Instruction Manual

OS30 Watch Movement

Cal. 0S30 Instruction manual
CHRONOGRAPH FUNCTION:CENTER CHRONOGRAPH SECOND HAND 1/1 sec.
Timing up to 11 hours 59 minutes 59 seconds

DISPLAYS AND BUTTONS

MIYOTA OS30 Watch Movement - fig 1

SETTING THE TIME

  1. Pull the crown out to the 2nd position.
  2. Turn the crown to set hour and minute hands.
  3. When the crown is pushed back to the normal position, small second hand begins to run.

USING THE CHRONOGRAPH

This chronograph is able to measure and display time in 1/1 second united up to maxinum of 11 hours 59 minutes 59 seconds.
The chronograph second hand keeps continuously for 11 hours 59 minutes 59 seconds after starting.

Measuring time with the chronograph

  1. The chronograph can be started and stopped each time button “A” is pressed.
  2. Pressing button “B” resets the chronograph and the chronograph second hand, chronograph minute hand, and chronograph hour hand return to zero position. MIYOTA OS30 Watch Movement - fig 2

CHRONOGRAPH RESET (INCL. AFTER REPLACING BATTERY)

This procedure shoud be performed when the chronograph second hand does not return to zero position after the chronograph has been reset, and including after the battery has been replaced.

  1. Pull the crown out to the 2nd position.
  2. Press button “A” to set the chronograph second hand to the zero position. The chronograph hand can be advanced rapidly by continuously pressing button “A”.
  3. Once the hand have been zeroed, return the crown to the normal position.
  • Do not push crown to normal position while the chronograph second hand returns to zero position.
    It stops on the way when crown are returned to normal position and its position is recognized as zero position.
    These specifications might be changed without prior notice.

Documents / Resources

| MIYOTA OS30 Watch Movement [pdf] Instruction Manual
OS30 Watch Movement, OS30, Watch Movement, Movement
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