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Safety considerations
UWATEC
®
Smart dive computers
• Always dive with back-up instruments. Make sure that you always use back-up instrumentation
including a depth gauge, submersible pressure gauge, digital bottom timer or dive watch, and have
access to decompression tables whenever diving with a dive computer.
• Avoid repeated ascents and descents (yo yo diving).
• Avoid repeated heavy workload while at depth.
• Plan the dives to be shorter if they are made in cold water.
• After finishing the decompression or at the end of a no-stop dive, the final stage of the ascent should
be as slow as possible.
• You MUST be familiar with all signs and symptoms of decompression sickness before using this com-
puter! Seek IMMEDIATE treatment for decompression sickness should any of these signs or symptoms
occur after a dive! There is a direct correlation between the effectiveness of treatment and the delay
between the onset of symptoms and the treatment for decompression sickness.
• Only dive with Nitrox after you have been thoroughly instructed by a recognised institution.
Repetitive dives
• Do not start your next dive before your CNS O
2
% status has dropped below 40%.
• Diving with Nitrox: Make sure your surface interval is long enough (just like diving with compressed
air). Plan for a minimum surface interval of two hours. Oxygen, too, needs sufficient time to leave
the body.
• Match gas mixture to the intended dive.
• Do not attempt a repetitive dive if the microbubble warning
NO
is visible on the display.
• Plan a day without diving once a week.
• If you have to change computers, wait at least 48 hours before carrying out your next dive.
Altitude and diving
• Do not dive at altitudes higher than 4000m (13000 feet).
• After a dive do not rise to altitudes that the computer prohibits via the flashing altitude
segments (see page 25).
Flying after diving
• After diving, wait at least 24 hours prior to flying.
Smart Z dive instrument is a personal protective equipment in compliance with the essential safety
requirements of the European Union directive 89/686/EEC. RINA SpA, Via Corsica 12, I-16128 Genoa,
notified body no. 0474, have certified the conformity with the European Standard EN 250:2000 and
EN 13319:2000.
EN250:2000 Respiratory equipment - Open circuit self contained compressed air diving apparatus -
Requirements, testing, marking (pressure gauge test).
EN13319:2000 Diving accessories - Depth gauges and combined depth and time measuring devices -
Functional and safety requirements, test methods. Any information on decompression obligation displayed
by equipment covered by this standard is explicitly excluded from its scope.
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