OS80 - Smartwatch BREIL - Free user manual and instructions
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USER MANUAL OS80 BREIL
When reading this instruction booklet, keep the watch diagram on the left unfolded and in full view. The symbols (A, B, etc.) on the diagram are those referred to in the section describing the operating instructions.
Thank you very much for purchasing a BREIL WATCH. To ensure its correct use, please read these instructions carefully.
In order to be able to make full use of the guarantee service (subject to the guarantee terms), please ensure that the Breil international guarantee card is supplied with the watch at the time of purchase.
① Stopwatch second hand
② Minute hand
③ Alarm hand
(4) Continuous second hand or stopwatch 1/20 second hand
⑤ Alarm on/off hand
⑥ Stopwatch hour hand
⑦ Hour hand
⑧ Stopwatch minute hand
Button A
Button ⑧
Button ©
Crown @
Crown operation
(0) Normal position : free
(1) First click : date setting
(2) Second click : time setting
Button operation
A:Start/Stop the stopwatch
8:Stopwatchmode
: Alarm on/off
The Manta Chrono Professional quartz watch Cal.0S80 is an analogue watch featuring calendar, alarm, stopwatch and tachymeter functions.
- The time is indicated by the hour, minute and small second hands. The date is indicated by the numeral shown in the calendar window.
- The stopwatch can measure up to 12 hours in 1/20 second increments.

- Unscrew the crown and pull it all the way out to the second click so that the second hand is set in the "0" position.
- Turn the crown to set the hour and minute hands to the desired time.
- Push the crown back into the normal position when the time signal sounds, and the small second hand will begin working.
- Screw the crown back in.

- Unscrew the crown and pull it out to the first click.
-
Turn the crown anti-clockwise to set the date.
-
Do not set the date between 9.00 P.M. and 1.00 A.M. as the date may not change properly.
- Once the date has been set, push the crown back to the normal position and screw it in again.
Pull out button ©. The alarm will begin sounding when the hour hand reaches the time at which the alarm is set.

[Alarm time setting]
- Unscrew the crown and pull it out to the first click (1).
-
Turn the crown clockwise to set the alarm hand to the desired time.
-
To set the date, turn crown anticlockwise.
- Push the crown back in to normal position.
- Pull out button o turn on the alarm.
- The alarm will sound when the hour hand reaches the position to which the alarm hand is set.
[Alarm engagement/disengagement]
- Pull out button ©: ALARM ON
- Push button © back: ALARM OFF
[Alarm disengagement]
- When alarm sounds, press button © to turn it off.
STOPWATCH
- The stopwatch can measure up to 12 hours in 1/20 second increments.
- The 1/20 second hand of the stopwatch will continue moving for around 30 seconds to return then to "0" position.

Stopwatch operation
- Press button ⑧ to switch to stopwatch mode.
- The continuous second (4) hand will stop in "0" position.
- Start and stop the stopwatch by pushing button
- The stopwatch 1/20 second hand will stop at the "0" position after 30 seconds. When you push button A to stop the stopwatch, the 1/20 second hand will move rapidly forward to show the amount of time measured.
- Press button ⑧ to stop measurement and reset the hands.

Setting the stopwatch hands
If the stopwatch hands to return to "0" position when the stopwatch is reset or the battery is replaced, perform the procedure below to reset them to "0".

- Unscrew the crown and pull it all the way out (second click).
- Press button to reset the stopwatch second hand to "0".
-
Press button ⑧ to reset the stopwatch 1/20 hand to "0".
-
The hands move quickly if the button A or B are kept pressed.
-
Once the hands have been reset, set the time again, then push the crown back in to normal position and screw it in.
- Press button ⑧ to check that the stopwatch hands go back to "0".

The tachymeter is used to measure the speed of a vehicle. By knowing how many seconds it takes the vehicle to travel one kilometre, the tachymeter can measure the approximate average speed in km/h during a journey (over a maximum measurable time of 60 seconds). If the chronograph is started at the same time as the start of the distance measurement and stopped after one kilometre, the average speed can be calculated from the position of the second hand. If the vehicle covers a distance of one kilometre in 45 seconds, then the approximate average speed is 80km / h
- Not available on all models.
| Indication | Use | |||
| Degree of water resistance | Dial | Case | Spray, sweat, light rain, washing, etc. | Swimming, etc. |
| A | - | - | NO | NO |
| B | WATER RESISTANT 30M (3ATM) | WATER RESISTANT | YES | NO |
| C | WATER RESISTANT 50M (5ATM) | WATER RESISTANT | YES | YES |
| D | WATER RESISTANT 100M (10ATM) | WATER RESISTANT | YES | YES |
| E | WATER RESISTANT 200M (20ATM) or more | WATER RESISTANT | YES | YES |
| "WATER RESISTANT" may sometimes be abbreviated to "WATER RESIST" | ||||
- In order to prevent water coming into contact with the internal mechanism, never pull the crown out when the watch is wet.
- If any watches designed for sportswear or use in water come into contact with salt water or heavy sweating, they should be rinsed in fresh water and dried thoroughly.
| in water | ||
| Skin-diving | Scuba diving | Water-resistance characteristics |
| NO | NO | Not water resistant. Must be kept away from water and moisture |
| NO | NO | Average water resistance. Can withstand spray, sweat, light rain, washing, etc. during daily use |
| NO | NO | Can be worn while swimming but not diving |
| YES | NO | Suitable for skin-diving. |
| YES | YES | Suitable for scuba diving. |
| * Always keep the crown in its normal position. * Full tighten crown screw lock. | ||
- Contact with water may cause a deterioration in the quality of some leather straps.
- As internal parts of the watch can retain moisture, when the outside temperature is lower than the inside, the watch glass may mist-up.
This phenomenon is purely temporary and should not create any problems.
However, if it persists for any length of time, the watch should be checked by the shop where it was purchased or by the nearest Authorised Service Centre.
Temperature
Do not leave the watch exposed to direct sunlight or temperature extremes for long periods of time.
Long exposure, in fact, may adversely affect the operation of the watch and actually shorten battery life, causing it to gain or lose time and affect its other functions.
Impact
This watch can withstand normal everyday impacts and shocks and those normally imparted by non-contact sports. Serious damage, however, may result if the watch is dropped or subjected to severe shock.
Magnetic fields
This watch is antimagnetic up to 60 gauss, and is therefore not affected by magnetic fields produced by normal domestic appliances. If used near strong magnetic fields, its operation may be temporarily affected.
Static electricity
The integrated circuits present inside the watch are sensitive to static electricity. If the watch is exposed to intense electrical fields, the time display may temporarily lose some of its accuracy.
Chemicals and gases
Avoid wearing the watch in the presence of strong gases or chemical substances. Parts of the watch may discolour, dissolve or even break if brought into contact with benzol or petroleum based products such as solvents, thinners, detergent, adhesives etc. Pay special attention to avoiding contact with chemicals.
The watch case and strap may discolour if they come into contact with mercury from a broken thermometer or other equipment.
Keeping the watch clean
Use an absorbent soft cloth to clean off any dirt or damp from the watch glass.
Wearing the watch when the strap or back of the case is dirty can cause skin irritation.
Cleaning the watch strap:
Metal bands: use a toothbrush and soapy warm to wash the dirt off.
- Plastic or rubber straps: wash with water. Do not use solvents.
- Leather straps: gently rub the face of the strap using a soft dry cloth. Clean the opposite side with a cloth and alcohol.
Periodic inspection
In order to guarantee long trouble-free operation, it is advisable to have the watch checked by an Authorised Assistance Centre once every two years.
Keep batteries out of the reach of children
If a battery is accidentally swallowed, consult a doctor immediately

TECHNICAL DATA
- Movement:
2.Type: - Loss/gain (monthly rate)
- Crystal oscillator frequency
- Useable temperature range
- Display modes
"Calendar"
"Alarm"
"Stopwatch"
- Battery
- Battery life
Cal.0S80
Analogue quartz watch with multi-display
Less than 20 seconds at normal
temperature range (5^ - 35^)
32,768 Hz (Hertz, cycles/sec)
- 10^ to +60^
Date display
Alarm sounds for 3 minutes 15 times
(sounds for 15 seconds with 165 second pause)
Measures in 1/20 second increments up to 11 hours, 59 minutes and 59 seconds.
One SR927W battery
Approx. 2 years (if alarm sounds for no more than 15 seconds per day and chronograph is used no more than 12 hours per day)
- In order to improve the product, the technical specifications may be modified without prior notice.
INDEX
A PIECES PRINCIPALES 18
B CHARACTERISTIQUES 19
C REGLAGE DE L'HEURE 20
D REGLAGE DE LA DATE 21
E REVEIL 22
F CHRONOGRAPHE 24
G TACHYMETRE 27
H PRECAUTIONS D'UTILISATION ET INFORMATIONS UTILES .28
DONNEES TECHNIQUES 32
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