Bulova 0S10 manual Preliminary Setting Procedure, Setting the Time, HOW to USE the Chronograph

Watch Setting Guide

BOOK NO. 547 • Chronograph/Date • SERIES 0S10/0S30

Your new Quartz Chronograph features the following:

1.Hours, minutes and seconds display.

2.Complete Chronograph function.

3.Date function (on some models).

4.Tachymeter (on some models).

This diagram will simplify following the step - by - step setting sequence.

Note: The watch crown has three specific setting positions. See diagram. Once the watch is properly set, except for date variations or time zone changes, adjustment is rarely, if ever, required. The push buttons designated as

“A” (at the 2 o’clock position) and “B”(at the 4 o’clock position) control the chronograph function.

PRELIMINARY SETTING PROCEDURE

Before the chronograph can be used, the chrono second hand must be in the “0”(zero) or 60th second position. If not, proceed as follows:

Step 1. Pull the crown to the “OUT” position.

Step 2. Slowly push and release button “A” until the chrono Second in the 60th second position. If the button is kept depressed, the hand will continue to move rapidly.

Step 3. When the hand is accurately positioned, push the crown to the “In” position and proceed to “Setting the Time.”

SETTING THE TIME

NOTE: Your watch is in normal time indication mode when the crown is in the “IN” position.

Step 1. When the small second hand reaches the 60th second mark, pull the crown all the way to the “OUT” position. All hands will stop.

Step 2. With the crown still in the “OUT” position, turn it to move hands FORWARD (clockwise) until you see the date change. This establishes midnight. Step 3. For AM time, continue to move hands FORWARD until the minute hand is approximately 5 minutes ahead of the desired minute marker; then, gently turn back to the same minute marker. For PM time, follow the same procedure, but first advance the hands past 12 o’clock.

Step 4. When the time standard by which you are setting your watch (telephone beep, etc.) reaches the 60th second, push the crown all the way to the “IN” position without turning. All normal hands will start instantly.

SETTING THE DATE (on some models)

Step 1. Pull the crown out to the “ INTERMEDIATE ”position (one “click“). Turn the crown counterclockwise until the desired date appears.

Step 2. Push the crown back to the “IN” position. The watch will now be operating normally.

NOTE: The date will advance automatically at midnight, provided that AM and PM have been established (see “Setting the Time”). The watch calendar is programmed for a 31-day cycle. Therefore, on the first day of any month following a month with less than 31 days, the date must be advanced manually. The date should never be changed manually between 9:00pm and 3:00am, as this might result in an inaccurate date display. However, the mechanism will not be damaged if the crown is turned accidentally during this time period.

HOW TO USE THE CHRONOGRAPH

Step 1. To start chronograph measurement, push and release button “A”. Step 2. To stop chronograph measurement, push and release button “A”. Measurement ceases; time is indicated.

Step 3. To reset chronograph hands to “0”, push and release button “B”.

HOW TO USE THE TACHYMETER (on some models)

Step 1. With the watch in normal time indication mode, push and release button “A” precisely at the start of a measured mile*

Step 2. Push and release button “A” precisely at the end of the measured mile Step 3. Read the outer edge of the dial to obtain your speed in miles per hour. Step 4. Reset your watch by pushing and releasing button “B“.

*NOTE: Some US highways have measured mile markers.

4/2006