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BÜHLMANN Decompression 01 User Manual
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BÜHLMANN Decompression 01 User Manual

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USER MANUAL BUEHLMANN DECOMPRESSION 01
Your Bühlmann Decompression 01 is a watch for demanding sportsmen and -
women. Please read this user manual to get acquainted with the functioning of your
watch and take note of all disclaimers, caution items and security recommendations.
Disclaimer
Whilst the Bühlmann Decompression 01 is a diver watch according to traditional
watchmaking industry standards, it is not a dive computer nor a professional diving
watch according to ISO or any other official - private or public - certification agency
or institution. It should UNDER NO CIRCUMSTANCE be used as the only diving
instrument or to replace a dive computer. It should also UNDER NO
CIRCUMSTANCE be used as the only diving instrument for managing diving at
altitude over 700m above sea level and to decide whether to fly or not to fly after a
dive.
Diving is an inherently dangerous sport and exposes one-self to the risk of
permanent injury and/or death. GFF Suisse SA t/a Watch Angels and Cronatec LLC
will not accept any liability for injury or death caused whilst engaging directly or
indirectly in any diving activities with the use of the Bühlmann Decompression 01
watch.
There are no warranties or guarantees, either expressed or implied that the
information contained in this user manual or our website www.watchangels.ch site is
accurate, correct, updated or reliable.
You are responsible for using your own good judgement. You should be in good
physical condition, enjoying good health, have a certification from a recognized
training organization and sufficient knowledge to participate in every dive. Your level
of fitness and experience is an essential requirement for your dive plans. You should
dive within your limits at all times, protect yourself from natures elements and stay
hydrated to maintain your physical condition.
Caution 01: Use a diving computer
Despite being, horologically speaking a professional diving watch, the Bühlmann
Decompression 01 should never replace a professional diving computer. Only dive
computers collect and calculate all the elements you need for secure diving. The
main goal of the Bühlmann Decompression 01 watch is therefore to help the diver
understand and apply the modern security instruments for free diving and UNDER
NO CIRCUMSTANCE to replace or being used as a diving computer.

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Summary of Contents for BÜHLMANN Decompression 01

  • Page 1 Decompression 01 should never replace a professional diving computer. Only dive computers collect and calculate all the elements you need for secure diving. The main goal of the Bühlmann Decompression 01 watch is therefore to help the diver understand and apply the modern security instruments for free diving and UNDER...
  • Page 2 To avoid this risk, you must screw down all the three crowns of your Bühlmann Decompression 01 tightly before entering the water and lock them with the bezel push-lock system. Never open a crown once you are under water! Only the decompression bezel can be turned during a dive.
  • Page 3 decompression data on the bezels for 20, 30 and 40m are only given for the longest possible bottom times of the Bühlmann decompression calculation disk. Attention! The breathing gas will therefore most likely not be sufficient for a dive with this bottom time 1.1 Description of the information on your watch (Fig.
  • Page 4 5 minutes at 9m, 15min at 6m and 35min at 3m. 1.2 How to use the decompression turning bezel Your Bühlmann Decompression 01 comes with three exchangeable decompression bezels for dives at 20, 30 and 40m. They can be exchanged by unscrewing the 4...
  • Page 5 screws on the side of the bezel using the provided screwdriver. Do not use any other screwdrivers to avoid the risk of damaging the screws. Each bezel should ONLY be used for a dive at the specified depth (or shallower) indicated on the bezel (a.) and at sea level or at maximum 700m above sea level (b.) If you use a bezel specified for a specific depth for a dive to deeper depth, the information will be wrong and if it is used for managing a dive this could lead to...
  • Page 7 Example 2: dive to 30m (Fig. 3) The 30m bezel shows a MAXIMUM bottom time of 75 minutes and three security stops. 1) Choose the 30m bezel and fix it to your watch 2) You will see on the bezel that there are 3 decompression stops markers for such dive: 1 = -9m (7min);...
  • Page 9 Example 3: dive to 20m (Fig.4) The 20m bezel shows a MAXIMUM bottom time of 105 minutes and two security stops. 1) Choose the 20m bezel and fix it to your watch 2) You will see on the bezel that there are 2 decompression stops markers for such dive: 1 = -6m (3min) and 2= -3m (31min) 3) When you reach stop 1 on your ascent, you stop and set the -6m/3min decompression stop marker (b) on the bezel in front of the minutes hand by...
  • Page 10 2. THE ACUAL DIVE TIME (ADT) INDICATOR Why the actual dive time indicator? The actual dive time indicator measures our total elapsed dive time to make sure that you do not exceed the maximum time you can stay underwater. Never stay longer under water as your expected air reserve! If necessary, organize a spare air tank.
  • Page 11 3. THE LOCK-UNLOCK SYSTEM FOR THE CROWNS AND HELIUM VALVE Why a security system for the crowns and valve? The security system is important to make sure that a wrong manipulation or any type of shock does not accidentally move the minutes hand and the inner turning bezel. This would change the ADT and decompression information and compromise the water-resistance of the watch.
  • Page 12 Bezel exchange To remove the bezels, use only the screwdriver provided and unscrew the 4 screws (d). Remove the bezel and replace it with another one and screw the 4 screws (d) back-on 4. THE FLY-NO FLY INDICATOR Why a fly-no-fly indicator? Flying after scuba diving is one of the more widely known risks to divers.
  • Page 13 As a general rule it is recommended to wait at least 24 to 48 hours before flying after doing any type of diving. This rule covers all types of dives and adds extra time as a safeguard. How to use the fly-no-fly indicator (Fig. 7) The fly-no-fly indicator (a) is located in the dial aperture at 9’o clock.

  • Page 14: Helium Escape Valve

    The quantity is sufficient to push out the crystal during the return to atmospheric pressure. To avoid this, the Bühlmann Decompression 01 is equipped with a valve helium escape valve. How to use the helium escape valve? (fig. 8) The helium valve should be used only in a decompression chamber.
  • Page 15 During the decompression phase in the decompression chamber, unscrew the crown of the valve (phase b) in order to release the mechanism. As the interior pressure becomes greater than the exterior pressure, it pushes the gasket (2) out of its seating, thus releasing the gas.
  • Page 16 7. SETTING THE TIME, THE FLY NO FLY INDICATOR AND MANUAL WINDING (Fig. 10) For these operations you use the center crown. To set the crown in position 1, 2 and 3 you first unlock the crown (see paragraph 3), then you unscrew the crown, and then: a) To manually wind the watch: pull the crown in position 1 and turn anti- clockwise...

  • Page 17: Additional Notes

    8. ADDITIONAL NOTES 9.1 The case-back (Fig. 11) The shape of the case-back gives a 5-degree inclination to the watch for optimized readability and increased wear comfort. The formula pt tol i.g. = (p amb/b) + a which is engraved on the case-back is the decompression algorithm developed by Dr.

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