# How read tachymeter - Watches

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### How to use Tachymeter in PL-12777JSBS model

Hi John
this model does not have a tachymeter only day date function on sub dials. there is a similar model 10962j which uses the same case this has the tacho function.

Dec 01, 2013 | Police Navy MF Mens Watch...

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### TACHYMETER/TACHOMETER - how to use it.

Many of watch brands has outer bezel ring calibrated as TACHYMETER/ TACHOMETER. In simple words this is SPEEDOMETER on your wrist, like in your car. The only difference is: it does not work automatic, but you have to have some maths basics in your brain to make work it.
The main thing is: As second is taken as measuring point (any wristwatch is moving sec by sec, min by min, hr by hr and so on), there is no actual possibility to measure speeds less than 60 km/h. This is because our time is divided to hours, minutes and seconds (1 hr=60 mins= 3600 secs), but ordinary watch on your wrist can't count smaller than a second, so, the starting point still is 60 for the majority.
The best watch tachymeters are producing/manufacturing BREITLING, as they have very long relationship with aviators all over the world. Braitling watches can count up to 1/10 of second.
OK, here is the link to learn basics of how to use tachymeter:
http://www.mydigitallife.info/2006/12/10/how-to-use-tachymeter-function-on-watch-bezel-usage-instruction-and-definition/

on Aug 06, 2010 | Watches

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### ROLEX COSMOGRAPH DAYTONA user guide.

on Feb 03, 2010 | Watches

### HOW USE TACHYMETER & WHAT TACHYME3TER MEANS

A Tachymeter helps you estimate the speed you are going.

It uses the basic formula that speed = Distance/time

To use tachymeter, simply start the chronograph or stopwatch when the object measured passing the starting line. When the object reaches the next mile or kilometer marker, stop the chronograph or stopwatch. The point on the tachymeter scale that adjacent to the second hand of the watch indicating the speed (in miles per hour or kilometers per hour) of object traveling between the two points.

For example, we want to measure the average speed of a vehicle is moving. Start the chronometer or stopwatch function when the car passes the starting line, and stop the timer after the vehicle traveled exactly 1 mile or 1 kilometer. Then look at where the chronometer hand (the second hand of the watch) is pointing to, and get the reading or value of the corresponding number at the tachymeter bezel or dial. Let's say the stopwatch stop at 3 o'clock position, meaning 15 seconds had elapsed for the car to travel 1 mile or 1 kilometer. At 3 o'clock position, the tachymetre value shows that number of 240, which means the average speed of the vehicle was 240 mph or km/h.

### Source(s):

http://www.mydigitallife.info/2006/12/10...

Apr 02, 2013 | DKNY NY5045 Watch for Men

### How do you use the tachymeter

http://www.mydigitallife.info/2006/12/10/how-to-use-tachymeter-function-on-watch-bezel-usage-instruction-and-definition/

Aug 06, 2010 | Timex 22991 Wrist Watch

### Just wanna know how to use the tachymeter in my watch

You can get instructions from the Casio web site.

Go to the casio web site "casio.com".

Select "support" and the "manuals", watches;

Accept terms

Select "watch manual archive"

Read the number of the back of your watch and enter it into the search box

Feb 22, 2010 | Casio G700D-1AV G-Shock Watch

### How do you use the tachymeter feature on my Expedition T45941? Is the bezel suppose to rotate, if so what direction? My bezel is not able to rotate.

I have looked at the instructions for your watch and was not able to find any reference to "tachymeter. Is there another name for this feature?

If you read through the instructions you will see that it mentions some watches have a rotating bezel but not all.

You can see a copy of the instructions by going to "timex.com" and at the bottom of the page is menu, select "manual/downloads", at the next page select "product manual downloads".

Put your watch type (T45941) in the search box and you will be presented with alternative versions. Choose one and download.

Jan 28, 2010 | Timex Watches

### The reset tachymeter don't stop at 12 oclock

you should pull the big button fully out, then by pushing the tachymeter play/pause you can set the starting point
wish it's helpful for someone :)

Jan 25, 2010 | Casio EF503D-1A Watch for Men

### Need to reset the tachymeter on my Guess Steel watch . The dial resets it's self to the "7" location instead of "12" on my watch. Is there a way to recalibrate the watch?

This is chronometer that's need reset. Tachymeter is usually located on bezel or inclined ring and is used for speed calculations of moving object over the given period of time. Ok, back to your chrono hand resetting. Pull out crown and then push the upper button and hold it. The chrono hand should start move and you should be able to adjust it. If this doesn't work, try the same with lower button. When adjusted - push the crown back in. In fact there are very many variations how to reset chrono hand, but exact advise can be given if the movement caliber of particular watch is known.
Rate me, plz.

Jan 11, 2010 | Guess Stainless Steel Chronograph Watch...

### Cannot set the date on the casio tachymeter

wen u twist th big thing do it twice and press the top button to set dates

May 05, 2009 | Watches

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