Citizen AD2992-59P Manuale utente

English

Enhanced Features and

Functions Guide

English

Enhanced Features and Functions Guide

This booklet contains instructions for using additional functions (mainly on the model

with the exterior rotating bezel). Use these instructions in addition to the instructions for

standard operation in the main operating manual. Some models have multiple functions.

There may be some discrepancy between the illustrations shown and the appearance of

your watch, however the method of operation will remain the same.

1. Tachymeter, speed calculation..................................... 4

2. Determining Compass Direction.................................. 5

3. Rotating Bezel, time calculation .................................. 6

4. Calculator Function ....................................................... 8

4-1. Simple Calculations............................................................................9

4-2. Calculator for Motor Sports...............................................................16

4-3. Calculator for Aviation......................................................................22

5. Yachting Functions ...................................................... 27

6. World Time.................................................................... 32

7. Terms for units indicated on slide rules and their

explanations ................................................................ 34

Contents

English

1. How to use the Tachymeter

The most common use of a tachymeter is for

measuring the approximate speed of a

vehicle over a known distance.

e.g.) Based on how many seconds it takes a

vehicle to travel 1km or 1 mile (the available

measuring range is up to 60 seconds), the

average speed within the distance can be

calculated.

Start the chronograph when the vehicles commences travel.1)

After the vehicle has travelled 1 km/1mile, stop the chronograph.2)

The approximate average speed within the distance can be determined

by observing the present position of the second hand and reading the outer bezel.

Note: The tachymeter indications may appear on dial ring, rather than on the outer

bezel (depending on model).

As shown in the illustration, it takes the vehicle 45 seconds to travel 1km or 1mi so

the approximate average speed is 80kph (50 mph).

Second hand

2. How to use the watch as a Compass

(Northern Hemisphere for instance)

The approximate direction can be

determined by comparing the position of

the hour hand to the sun. Keep in mind

that these determinations are approximate

as there is some discrepancy at different

latitudes and in different seasons.

Lay the watch horizontally and align the hour

hand of the watch with the direction of the sun.

The middle point between the alignment of the

sun with the hour hand, and the 12 o’clock

position on the dial, approximately indicates

South.

Positioning the rotating bezel so that it points south, will then allow you to read other

approximate compass directions.

Twelve.

o’clock

South

Hour

Hands

North

English

3. How to use the Rotating Bezel to

measure time

Align the zero mark “1) ” of the

rotating bezel with the position of the

minute hand.

Then, read the scale above the rotating2)

bezel, to which the minute hand points

so as to gure out the elapsed time.

As shown in the illustration, the

elapsed time is 10 minutes. Minute hand

Time

elapsed

Set the “” mark to the scheduled time.

You can now see the amount of time that•

remains until the scheduled point.

Note: The rotating bezel of Divers

watches conforming to ISO or JIS

standards, can only be rotated

counterclockwise in order to

reduce the risk of error. Remaining

time

Minute hand

English

4. How to use the calculator function

9 3

1:10

1:20

1:30

1:40

1:50

2:00

2:30

3:00

3:30

4:00

4:30

5:00

6:00

7:00

8:00

9:00

Note: In some models, the inner and outer scales are opposite. Be sure to make the

appropriate substitutions to the following instructions.

Simple Calculations4-1.

[How to do multiplication]

Q : 20 × 15

A : Adjust 20 of the outer scale until it points to 10 of the inner scale.

You can read the digit 30 from of the scale of the outer scale corresponding to 15 of

the inner scale and adding a unit, you can get the answer 300.

English

[How to do division]

Q : 250 ÷ 20

A : Adjust 25 of the outer scale until it points to 20 of the inner scale.

You can read the digit 12.5 from of the scale of the outer scale corresponding to 10

of the inner scale and get the answer 12.5.

[How to calculate ratios]

Q : 30/20 = 60/A

A : Adjust 30 of the outer scale until it points to 20 of the inner scale.

You can read the digit 40 from of the scale of the inner scale corresponding to 60 of

the outer scale and on all the positions above the scale, the ratio between “inner and

outer” is the ratio between “30 and 20”. Therefore, you can determine the answers of

other ratios.

English

[How to convert volume between different units of measurement]

You can convert fuel between Pounds (lbs), U.S Gallons, Imperial Gallons or Liters.

Q : How much is 13.1 lbs of fuel if

it is converted into U.S.Gallons,

Imperial Gallons and Litres

respectively?

(1 FUEL.LBS is 0.167

U.S.GAL / 0.139 IMP.GAL /

0.632 Liters)

A : Adjust the “” of FUEL.LBS.

of the outer scale until it points

to the digit 13.1, which you want to convert, of the inner scale.

Read the digit corresponding to the “” of U.S.GAL of the outer scale.

Adding a unit and you will get the answer which is 2.18 U.S.GAL.

Similarly, read the digit corresponding to the “” of IMP.GAL., LITERS., you can

get the answers, which are 1.82 IMP.GAL and 8.28 Liters.

[How to convert weight between the different units of measurement]

You can convert between Oil in Pounds to U.S. Gallons, Imperial Gallons or Liters.

Q : How much is 16.4 lbs of oil

converted into U.S. Gallons,

Imperial Gallons and Liters

respectively?

(1 OIL.LBS. is 0.133

U.S.GAL, 0.111 IMP.GAL

and 0.503 Liters)

A : Adjust the “” of OIL.LBS.

of the outer scale until it

points to the digit 16.4, which you want to convert, of the inner scale.

Read the digit corresponding to the “” of U.S.GAL of the outer scale. Adding a

unit and you will get the answer which is 2.18 U.S.GAL.

Similarly, read the digit corresponding to the “” of IMP. GAL., LITERS., you can

get the answers, which are 1.82 IMP. GAL and 8.25 Liters.

English

[How to convert distance between the different units of measurement]

You can convert between Kilometers, Nautical Miles and Statute miles.

Q : How many Kilometers and Nautical Miles are equivalent to 1 Statute Mile?

A : Adjust the “” of 10 of the outer scale until it points to the “” of STAT of the

inner scale.

Result: Read 16 of the scale corresponding to the “” of KM of the inner scale.

Move the decimal point once, and you will get the answer which is 1.6km.

Similarly, you can get the answer 86.6 NAUT corresponding to the “” of NAUT.

[How to convert fuel between different units of measurement]

You can convert between Liters, US Gallons or Imperial Gallons.

Q : How many Liters are equivalent to 16.8 U.S Gallons?

A : Align the “” of U.S. GAL of the outer scale with the digit 16.8, which you want to

convert, of the inner scale.

Result: The converted value (about 63.5) corresponding to the “” of liter of the

outer scale can be determined.

(1 U.S. GAL = 3.78541 Liters)

English

How to use the motor sports function4-2.

[Calculation of time needed to reach a set distance]

Q : How long does it take for a vehicle travelling at a speed of 80km to travel 400km?

A : Align 80 of the outer scale with the SPEED INDEX“” of the inner scale.

Result: 5 Hours (5.00) of the inner scale correspondes to 40 of the outer scale.

[Calculation of speed]

Q : What is the speed of a vehicle travelling a distance of 180km for period 2 hours

and 30 minutes?

A : Align 18 of the outer scale with 2:30 of the inner scale.

Result: 72km can be determined by comparing the SPEED INDEX “” of the inner

scale and corresponding outer scale indications.

English

[Calculation of driving distance]

Q : Supposing that the speed is 60km/hour, what distance will a vehicle travel in 1 hour

and 20 minutes?

A : Align 60 of the outer scale with the SPEED INDEX “” of the inner scale.

Result: 80km corresponding to 1:20 of the inner scale can be gured out.

[Calculation of fuel consumption rate (consumed per hour)]

Q : If the drive time is 5 hours and 30 liters fuel are consumed, what is the fuel

consumption rate ( liters/hour)?

A : Align 30 of the outer scale with 5:00 of the inner scale.

Result: 6 Liters per hour - 60 is indicated on the SPEED INDEX “”

corresponding to the outer scale.

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664

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