Chase-durer COMBAT COMMAND Operation Manual

COMBAT COMMAND

AUTOMATIC CHRONOGRAPH

OPERATION MANUAL

Table of Contents

Display and Screw Down Crown/Pushbuttons

® Winding / Setting Local Time

® Setting Day and Date

®

® Tachymetre

® Miscellaneous

® Specifications

®

Timing Mode • Chronograph Function

® Tachymetre

1

2

3

4

5

6

7

8

1.

DISPLAY and Screw Down Crown/Pushbuttons

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CHRONOGRAPH HANDS

WATCH HANDS

12 hour counter

60 second counter

30 minute counter

Minute hand

Hour hand

Second hand

Pushbutton A

Setting Crown

Bezel with Minute

Index Marks

Pushbutton B

Day and Date

Window

Screwed

Down

Winding and Setting Positions

3 4

1

2

Screw Down Crown and Pushbuttons

NOTE - Failure to screw down crown to resist moisture will void your warranty

WARNING: Crown must be locked down in position 1 at all times, use positions

2 - 4 for winding and adjustments only. Pushbuttons do not screw down; Do not operate pushbuttons under water!

1 crown in and turn clockwise until tight. Turn crown counterclockwise until you no longer feel the threads gripping; crown can now be pulled out to positions 2 - 4.

2 Winding position.

3 Day and Date adjustment position.

4 Stops second hand, setting minute and hour hands position.

Push

2.

Winding / Setting Local TIME

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Position 2

is used for winding only

of setting crown

Day and Date change each time

hour hand passes midnight

(24:00 hours)

Setting crown in position 4 is

used to adjust both hour and

minute hands*

*Setting crown in position 4 Stops the Second Hand to allow synchronizing with a time signal.

There are many accurate sources for this time signal including shortwave radio frequencies that continuously announce GMT (UTC) and the internet.

3 4

1

2

Note - When setting the time, pay attention to the Day/Date window to make sure you are setting the time correctly for AM or PM. The Day and Date begin changing at 11PM (23:00 hours).

NOTE: If your watch stops, it must be wound by turning the crown clockwise approximately 25 full

turns. Although the watch is automatic, the mainspring may not have enough reserve to keep it running accurately. Once wound, the normal movement of wearing the watch will provide enough power to

keep accurate time.

3.

Setting Day Dateand

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Turn crown backward in

position 3 to set the Day

Turn crown forward in

position 3 to set the Date

Day and Date change each

time the hour hand passes

midnight (24:00 hours)

When setting Day and Date, the minute and hour hands must not be positioned between 8PM (20:00) and 3AM (03:00). During this time the date mechanism is engaged and adjusting it may cause damage to the gear.

- - Important Note

4.

Timing Mode • Chronograph Function

ADD FUNCTION: Order in which pushbuttons should be pressed.

Reset to zero

B

START STOP

Read

START STOP

Read

1

2

3

4

X

to order of functions

1

3

A

Setting crown in position 1

A

B

START

STOP

Reset to Zero

1 2

3

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5.

Tachymetre

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slower, such as a bicycle, you must use a shorter distance because the elapsed time must fall within

the second range.

For this example, it took 36 seconds for a cyclist to travel 1/4 of a mile. Reading the TACHYMETRE dial displays a speed of 100mph, but the cyclist only traveled 1/4 of a mile, so the actual speed would be 1/4 of that or an average speed of 25mph over the quarter mile.

Example No. 2 – To measuring something much

7.2 - 60

Using the TACHYMETRE scale

The TACHYMETRE dial is mainly used to compute an average speed after noting how long it takes to travel a fixed distance (like one mile or one kilometer), but it can also be used to compute many other things. The dial is a logarithmic scale that uses this formula to compute:

The chronograph second hand indicates 1/10, 1/4, 1/2, 1, 10, 100 or 1,000 etc. units (miles, objects, pounds etc.). When stopped, the second hand points to the number on the TACHYMETRE scale by which the number of units (1, 10, 100 or 1,000 etc.) must be multiplied to obtain per-hour production rate or per-hour speed.

TACHYMETRE DIAL = 3600 / Elapsed

Time In Seconds

seconds. The second hand, stopped as the mile marker is passed, reads 120 on the TACHYMETRE scale. Average speed of the car is 120 x 1, or 120 miles per hour.

Although decimal units (100 liters, 1 mile, 10 kilometers) make computing simple, in practice, the TACHYMETRE scale can be used to calculate velocities and production rates from any number of units.

Example No. 1 – A car covers one mile in 30

A

START/STOP

A

START/STOP

6.

Tachymetre

More Examples:

Suppose you wanted to measure the speed of a jet airplane. After traveling 10 kilometers, you noted that 40 seconds had elapsed. The TACHYMETRE dial displays 90, but you traveled 10 kilometers, so the answer would be 10 times that, or 900 km/hour.

You can also measure other things, like fuel consumption. Suppose a pound of fuel took 48 seconds to burn. The chronograph second hand indicates on the TACHYMETRE dial that you are burning 75 pounds of fuel per hour.

timed for 30 seconds produces 72 parts. Stopped at the 30-second mark, the chronograph second hand points to 120 on the TACHYMETRE scale; the production rate of the machine is 120 x 72, or 8,640 parts per hour.

Example No. 4 – A manufacturing production line

Example No. 3 – A copier makes 10 copies in 45

seconds. The sweep second hand was thus stopped at the 45-second mark, which coincides with the figure 80 on the TACHYMETRE scale. The hourly rate of this copier is 80 x 10, or 800 copies.

NOTE - The scale is valid for all elapsed times from seconds to seconds. If the duration of the event is outside this range, then the answer on the dial is not valid. Some of the following examples show ways to get around this limitation.

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A

START/STOP

A

START/STOP

7.

Miscellaneous

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At 68 F (20 C), sound travels at 344m or 376yds / 1,129ft per second in air at sea level.° °

Therefore, 68 F (20 C) sound

1 mile (1,760 yards / 5,280 feet) in 1,000 yards in 1 kilometer in

To estimate the distance to an event (such as an explosion, muzzle flash, lightning, etc.), measure the time from the visual flash to the sound and multiply the seconds by the per second speed.

For example the measured lightning to thunder time at 68 F is 10 seconds. 10 x 344m or

376yds / 1,129ft would produce 3,440m or 3,760yds / 11,290ft. (2.14miles)

Alternately, you can divide the measured time at 68 F by 4.68 to get miles (10s / 4.68 = 2.14miles),

or 2.66 for thousand yard distance, or by 2.91 for kilometers.

at will travel:° °

°

4.68 seconds

2.66 seconds

2.91 seconds

Example: Sea level temp is and

lightning to thunder measured time is 18 seconds. Distance of lightning strike point is:

18s x 1,129ft = 20,322ft 18s x 376yds = 6,768yds 18s x 344m = 6,192meters OR: 18s / 4.68s = 3.85 miles 18s / 2.66s = 6.77 thousand yards 18s / 2.91s = 6.18 kilometers

68 F °

At 32°F (0°C), sound travels at 332m or 363yds / 1,089ft per second in air at sea level.

Therefore, at 32°F (0°C) sound will travel: 1 mile / 1,760 yards / 5,280 feet in 1,000 yards in 1 kilometer in

4.85 seconds

2.75 seconds

3.01 seconds

NOTE:

8.

Specifications

COMBAT COMMAND AUTOMATIC

Technical Specifications

® SWISS Made, ETA VALJOUX 7750 25-jewel automatic movement;

28,800 pulsations per hour; Incabloc anti-shock system; Nivaflex 1 spring,

tight tolerances of adjustment.

® Minimum 42-hour power reserve.

® Chronograph: 60 seconds, 30 minutes & 12-hour elapsed time.

® Case and bracelet in solid 316L stainless steel.

® Deployment buckle with double lock security clasp.

® Screw-locked crown & screw-in exhibition back.

® Unidirectional, ratcheted count-up bezel.

® Tachymetre

® Calendar day and date windows.

® Super-LumiNova advanced illumination system on hands & indexes.

® Scratch-resistant sapphire crystal.

® Water resistant to 100m/330 feet.

® Diameter - 40mm.

® Serial numbered.

® 2 year limited international warranty.

ETA Valjoux 7750

CHASE-DURER

9601 Wilshire Blvd. #1118 Beverly Hills, CA 90210 USA Tel: 800.544.4365 / 310.550.7280 Fax: 310.550.0830 E-mail: [email protected]

www.chase-durer.com