User manual SCUBAPRO-UWATEC SMART Z

[. . . ] Smart Z ® SWISS MADE BY UWATEC AG Français English Operating Manual Deutsch Safety considerations You must carefully read and understand this entire manual before using your new computer. Even if you follow the instructions of this manual in a careful manner, it is still possible that you may be seriously injured or die from decompression sickness, oxygen toxicity or some other inherent risk of scuba with Nitrox or compressed air. Unless you are fully aware of these risks and are willing to personally accept and assume responsibility for those risks, do not use the computer! WARNING Guidelines for the use of your UWATEC dive computer: The following guidelines are derived from the latest medical research and the recommendations of the American Academy of Underwater Sciences for diving with diving computers. Following these guidelines will greatly increase your safety while diving, but cannot guarantee that decompression sickness or oxygen toxicity will not occur. [. . . ] Smart Z will switch back to its normal display as soon as new data is received. % If tank pressure <14 bar/200psi UWATEC® Smart dive computers WARNING If the tank pressure is lower than 14bar/200psi the transmitter switches off and Smart Z will display "---". Do not let the tank pressure drop below 14bar / 200psi. 21 English 4 Functions during the dive 4. 10 Remaining Bottom Time (RBT) RBT is the time left at the current depth until the point of time when the ascent must be started. The RBT is calculated on the basis of the current tank pressure, breathing rate, the temperature, and the dive data so far recorded. The RBT is based on the assumption that the tank pressure should amount to the set pressure (default 40 bar/600 psi) at the end of the dive. A graphic representation of RBT is on page 15. WARNING Never allow the RBT to go below three minutes. If the RBT goes below three minutes there is a danger of insufficient supply of gas mixture for the ascent as well as an increased risk of decompression sickness, and serious injury or death may result!Correct calculation of RBT when using a reserve or "J" type valve is possible only if the reserve function of the valve is in the open (down) position during the dive. If the RBT drops below three minutes, an audible attention signal is activated, the ascent arrow is displayed and the tank icon start flashing. The RBT value should never reach "0:". With RBT=0 the remaining tank reserve may not be sufficient for the ascent. When the last minute has passed (RBT=0) an audible alarm is activated every 4 seconds. The RBT, the ascent arrow and the tank icon start flashing. The audible alarm on exceeding the RBT is suppressed at depths less than 6. 5 m (21 ft) if Smart Z is in the no-stop phase. Start ascent at once. 4 sec WARNING % RBT < 3 minutes WARNING % RBT = 0 minutes 4. 11 Decompression information No-stop time is displayed if no decompression stops are necessary. The arrow decompression stops are necessary. The figures indicate no-stop time in minutes. NO STOP is visible if no NO STOP · No-stop display "99:" means remaining time of 99 minutes or more. · No-stop time is calculated on line and influenced by the current workload and current water temperature No-stop time 4 sec CNS O2% WARNING If no-stop time drops below 3 minutes, an audible attention signal is activated and the no-stop value begins to flash. If no-stop time is less than 1 minute, the no-stop display shows the flashing value "0". In order to prevent a decompression dive, ascend slowly until the no-stop time is 5 minutes or more. Dives that require decompression stops are not recommended. UWATEC® Smart dive computers NO STOP WARNING 22 4 Functions during the dive Decompression values III CNS O2% DECO STOP Decompression stop depth Decompression time On entering the decompression phase, the arrow NO STOP disappears, the arrow DECOSTOP appears and an attention beep goes off. Right beside the arrow, the deepest decompression stage in metres (feet) is displayed. Next to the decompression stop depth, the decompression stop duration of the displayed stage appears in minutes. [. . . ] Fasten the transmitter cap with the 3 screws. Mount the transmitter on the HP outlet of the first stage of the regulator and check transmission and pairing. If you do not receive valid tank pressure data, transmitter and dive computer must be paired again. 3 Conversion of tank pressure Tank pressure indicated may differ from the information given by a manometer/pressure gauge. Smart Z displays pressure always converted to a temperature of 20°C / 68°F, whereas the mechanical pressure gauge displays the current pressure influenced by temperature. [. . . ]