User manual CASIO QW-828

[. . . ] is used to emphasize important information. COPYRIGHT, TRADEMARK AND PATENT NOTICE This instruction manual is copyrighted and all rights are reserved. It may not, in whole or in part, be copied, photocopied, reproduced, translated, or reduced to any media without prior written consent from CASIO. CASIO, QW-828, Consumed Bottom Time (CBT), Oxygen Limit Fraction (OLF), CASIO RGBM, Continuous Decompression and their logos are all registered or unregistered trademarks of CASIO. Patents have been issued or applied for one or several features of this product. CE The CE mark is used to mark conformity with the European Union EMC directive 89/336/EEC. [. . . ] In the permanent Error Mode and GAUGE Mode the no-flying time is 48 hours. Flying or traveling to a higher altitude after a dive may significantly increase the risk of decompression sickness. WARNING! YOU ARE ADVISED TO AVOID FLYING ANY TIME THE COMPUTER COUNTS DOWN THE NO-FLYING TIME!Further, the Divers Alert Network (DAN) advises as follows: - A minimum surface interval of 12 hours would be required in order to be reasonably assured a diver will remain symptom free upon ascent to altitude in a commercial jetliner (altitude up to 2400 m [8000 ft]). - Divers who plan to make daily, multiple dives for several days, or make dives that require decompression stops, should take special precautions and wait for an extended interval beyond 12 hours before flight. Further, the Undersea and Hyperbaric Medical Society (UHMS) suggests divers using standard air tanks and exhibiting no symptoms of decompression sickness wait 24 hours after their last dive to fly in an aircraft with cabin pressure up to 2400 m [8000 ft]. The only two exceptions to this recommendation are: - If a diver had less than 2 hours total accumulated dive time in the last 48 hours, then a 12 hour surface interval before flying is recommended. - Following any dive that required a decompression stop, flying should be delayed for at least 24 hours, and if possible, for 48 hours. CASIO recommends that flying is avoided until all the DAN and UHMS guidelines and the dive computer wait to fly conditions are satisfied. WARNING! THERE CAN NEVER BE A FLYING AFTER DIVING RULE THAT IS GUARANTEED TO PREVENT DECOMPRESSION SICKNESS COMPLETELY! 34 3. 6. AUDIBLE AND VISUAL ALARMS The dive computer features audible and visual alarms to advise when important limits are approached or to acknowledge preset alarms. C B T m MAX NO DEC TIME A short single beep occurs, when: · · the dive computer is activated when the dive computer automatically returns to the TIME Mode. °C TIME BEE BEE EEP P P B Fig. 3. 31 Preset time alarm is activated. Three single beeps with a two second interval and the backlight activated for 5 seconds occur, when: · the no-decompression dive turns into a decompression dive. An arrow pointing upwards and the blinking ascent warning ASC TIME will appear. C B T m MAX NO DEC TIME Continuous beeps and the backlight for 5 seconds occur, when: · the maximum allowed ascent rate, 10 m/min [33 ft/min], is exceeded. You should immediately ascend above the PO2 depth limit (Fig. · 36 WARNING! WHEN THE OXYGEN EXPOSURE WARNING (OLF) INDICATES THAT THE MAXIMUM LIMIT IS REACHED, YOU MUST IMMEDIATELY ASCEND UNTIL THE WARNING STOPS BLINKING!Failure to take action to reduce oxygen exposure after the warning is given can rapidly increase the risk of oxygen toxicity and the risk of injury or death. WARNING! CASIO STRONGLY RECOMMENDS THAT SPORT DIVERS LIMIT THEIR MAXIMUM DEPTH TO 40 M [130 FT] OR TO THE DEPTH CALCULATED BY THE COMPUTER BASED ON THE ENTERED O2 AND PO2 OF 1. 4 BAR SETTINGS. Exposure to greater depths increases the risk of oxygen toxicity and decompression sickness. 3. 7. HIGH ALTITUDE DIVES AND PERSONAL ADJUSTMENT The dive computer can be adjusted for increasing the conservatism of the mathematical nitrogen model and for diving at altitude. 3. 7. 1. Altitude Adjustment When programming the instrument for the correct altitude, you need to select the correct Altitude Mode according to Table 3. 3. As a result, the dive computer adjusts its mathematical model according to the entered altitude mode, giving shorter no-decompression times at higher altitudes (see Section 6. 1. "Operating Principles", Table 6. 1. and 6. 2. ) TABLE 3. 3 ALTITUDE ADJUSTMENT RANGES (NEW RANGES 0 - 300m -1500m - 3000m) Altitude mode A0 A1 A2 Symbol on display Altitude range 0 ­ 300 m [0 - 1000 ft] 300 ­ 1 500 m [1000 - 5000 ft] 1 500 ­ 3 000 m [5000 - 1000 ft] 37 The entered Altitude Adjustment Mode is indicated by mountain symbols (A0, A1 = one mountain, or A2 = two mountains). "Altitude Adjustment and Personal Adjustment Setting" describes how the Altitude Mode is adjusted. WARNING! SET THE CORRECT ALTITUDE ADJUSTMENT MODE!When diving at altitudes greater than 300 m [1000 ft] the Altitude Adjustment feature must be correctly selected in order for the computer to calculate no-decompression status. [. . . ] Nitrogen partial pressure equivalent table. The deepest depth during a decompression dive at which decompression takes place. After a change in ambient pressure, the amount of time required for the partial pressure of nitrogen in a theoretical compartment to go half-way from its previous value to saturation at the new ambient pressure. A single or repetitive dive that includes time spent at various depths and whose no-decompression limits are not determined solely by the maximum depth attained. [. . . ]