Cal. DH33 INSTRUCTIONS (P. INSTRUCCIONES (P. 118) BEDIENUNGSANLEITUNG (S. 30) 2) INSTRUÇÕES (P. 146) INSTRUCTIONS (P. 58) (174 ) ISTRUZIONI (P. 86) You are now the proud owner of a SEIKO Diving Computer Cal. DH33. For best results, please read the instructions in this booklet carefully before using your SEIKO Diving Computer. Please keep this manual handy for ready reference. Sie sind jetzt stolzer Besitzer eines SEIKO Tauchcomputers Kal. DH33.
ENGLISH English WARNING The SEIKO Diving Computer Cal. DH33 is intended for use in an inherently hazardous form of recreation. Therefore, it is absolutely essential that you strictly observe all instructions for the use and maintenance of the watch set forth in this manual. First of all, this watch is for use in recreational (no-decompression) diving in water having a temperature range -5° C to +40° C (+23° F to +104° F) only by adults in good health and having average physical strength.
decompression sickness and other hazards, and are not intended to guarantee the safety of the diver. It is necessary to use other diving equipment together with the watch for safety’s sake. Also note that the possibility of decompression sickness and other hazards may increase depending on such factors as the individual diver’s physiological characteristics, environmental conditions and the extent of the diver’s fatigue. Finally, the watch is intended for use by a single user.
English PRECAUTIONS FOR DIVING ● Strictly observe the precautions below to enjoy safe diving with the SEIKO Diving Computer Cal. DH33. IN GENERAL ● Do not stay underwater beyond the no-decompression limits. ● When you have descended below 15 m (50ft), be sure to make a safety stop in ascent at 3 to 6 m (10 to 20 ft). If the watch gives a decompression warning, it is recommended that you stay at the decompression stop depth longer than the stop time that the watch indicates.
19.4 m x 1.03/1.00 ≒ 20.0 m (66 ft) AFTER DIVING ● Be sure to rinse the watch in fresh water, and wash out all seawater, soil, sand, etc. ● After cleaning the watch in fresh water, be sure to wipe it thoroughly dry. ● If the watch is left soaked in water for a long time for removing salt or other purposes, the auto sensor function is activated and consumes battery energy. ● If a grain of sand or the like gets in the pressure sensor, rinse the watch in fresh water to wash it out.
English FEATURES The SEIKO Diving Computer Cal. DH33 is a digital diver’s watch featuring dive computer functions. An algorithm is programmed into it to calculate multilevel diving. DIVE COMPUTER FUNCTIONS ■ Algorithm ● The watch has an algorithm that calculates multilevel diving. ● The watch uses an algorithm developed by Mr. Randy Bohrer, one of the most distinguished scientist in this field, which expands upon the theories of the so-called Swiss model.
English BUTTONS AND DISPLAY CHANGE ● Other than in the DIVE mode, the display changes in the following order by pressing button A . * The display indicator “ ” shows to which display the watch is set. * If the watch is left untouched in any of the displays other than TIME/CALENDAR and DIVE, the display will automatically return to the TIME/CALENDAR in 5 to 6 minutes. Press button A .
■ TIME/CALENDAR FUNCTION ▼ English HOW TO USE TIME FUNCTIONS TIME/CALENDAR SETTING ● The time/calendar setting cannot be made for 10 minutes after a dive. ▼ D Press to set the flashing digits. * The digits move quickly by keeping the button pressed. A Press to show TIME/CALENDAR display. Current time ▼ B Regular alarm time * When both the hour and minute digits are flashing, changeover between 12- and 24-hour indications can be made. ▼ Press to show TIME/CALENDAR SETTING display.
■ REGULAR ALARM FUNCTION ● ● ● ● English HOW TO USE TIME FUNCTIONS The alarm can be set to ring once a day at a designated time. Once the alarm is set, the set time is shown in the TIME/CALENDAR display. Alarm can be tested. Hourly time signal is provided. REGULAR ALARM SETTING A Press to show REGULAR ALARM display. ▼ B ▼ C Press to show REGULAR ALARM SETTING display. B C A D With each press, flashing digits change in the following order: ▼ ➡ Minutes Press to set the flashing digits.
English HOW TO USE TIME FUNCTIONS ■ ILLUMINATING LIGHT ● How to stop the regular alarm The regular alarm rings at the designated time for 20 seconds and stops. While the alarm is ringing, the regular alarm mark flashes. To stop them manually, press button C , or D A , B D Press in the displays other than DIVE PLAN and DIVE LOG to turn on the illuminating light. , in any display. • The display panel is evenly illuminated for 2 to 3 seconds.
■ HOUR CORRECTION FUNCTION English HOW TO USE TIME FUNCTIONS ● When you travel around different time zones, the time/calendar of the place you visit can be set easily. ● The time difference can be adjusted in 30 minute increments up to 24 hours. The calendar is also adjusted accordingly. ● When you dive in a different time zone, it is recommended that you use this function to set the time/calendar of the diving site before diving.
English HOW TO USE DIVE COMPUTER FUNCTIONS ■ NITROX DIVING FUNCTION ● The percentage of oxygen in the air used for ordinary diving is 21%. The higher percentage of oxygen in the gas mixture means a lower percentage of nitrogen than ordinary air, reducing the risk of decompression sickness. WARNING ● This function should be used only when you dive with a gas mixture of oxygen and nitrogen other than ordinary air. When diving with air, be sure to set the percentage of oxygen (FO2) to “Air”.
English HOW TO USE DIVE COMPUTER FUNCTIONS Notes: 1. For 10 minutes after a dive, FO2 setting cannot be made. 2. If the watch is left untouched in the FO2 SETTING display, the display will automatically return to the FO2 in 1 to 2 minutes. When the nitrox mark “Nx” is flashing: ▼ C Press once to show “Air” for diving with ordinary air. C • “Nx” disappears. Nitrox mark ● If FO2 was set for nitrox diving the previous day and the date has changed to the next, a flashing “Nx” is shown on the display.
English HOW TO USE DIVE COMPUTER FUNCTIONS ■ ALTITUDE COMPENSATION ■ SELECTION OF MEASUREMENT UNITS ● This watch has a built-in pressure sensor to measure the ● The measurement units of depth and temperature can be altitude (above sea level) and indicates the altitude rank graphically in four levels. ● Residual nitrogen, no-decompression limits for the next dive and other data are calculated taking into account the current altitude.
■ DIVE PLAN FUNCTION English HOW TO USE DIVE COMPUTER FUNCTIONS WARNING ● Before using the dive plan function, be sure to check the gas mixture of your scuba tank, set FO2 accordingly and set the unit of depth as required. ● Use this function for planning a dive before diving. ● No-decompression limits corresponding to each of the 14 ranks of depth of water are displayed. Depth rank : ● In meters : 9 m, 12 m, 15 m, 18 m, 21 m, 24 m, 27 m, 30 m, 33 m, 36 m, 39 m, 42 m, 45 m and 48 m.
English HOW TO USE DIVE COMPUTER FUNCTIONS ■ DIVE FUNCTION ● The auto switch (water contact sensor) senses water and automatically activates the DIVE FUNCTION, showing the DIVE display. There is no need to change the displays manually. ● As you descend to 1.5 m (5 ft) underwater, the watch starts showing the current depth and measuring the diving time.
After no-decompression limit reaches “0” (during decompression diving): ● Never dive beyond the no-decompression limit. Residual nitrogen indicator Dive time Current depth Decompression stop depth Total ascent time ★ Decompression stop time Decompression diving mark ● When the no-decompression limit reaches “0” while diving, all the residual nitrogen indicators are displayed to indicate that the watch has shifted to decompression diving mode.
English HOW TO USE DIVE COMPUTER FUNCTIONS WARNINGS DURING A DIVE Indication Warning Description Ascent rate warning If you ascend in water at a rate greater than the specified one, flashing “SLOW” appears for 5 seconds and the warning sound beeps for 3 seconds. Three rates are specified depending on the depth level. 0.0 ~ 5.9 m (0 ~ 19 ft) : 8 m (26 ft)/min 6.0 ~ 17.9 m (20 ~ 59 ft) : 12 m (39 ft)/min 18.
English HOW TO USE DIVE COMPUTER FUNCTIONS DISPLAY AFTER A DIVE When you are less than 1.5 m (5 ft) underwater and the auto switch senses water: When you are less than 1.5m underwater or on the surface and the auto switch does not sense water: C Current depth ● The watch shows the dive display with the current depth being • TIME/CALENDAR display “0.0 m (0 ft)”. ● If the watch shows the dive display after you surface, check that water does not remain on the auto switch.
English HOW TO USE DIVE COMPUTER FUNCTIONS ■ DIVE LOG FUNCTION ● The log data recorded automatically while diving can be recalled. ● The stored data includes almost all the data necessary for keeping in log books. ● Log No., date of dive, entry time, exit time, dive time, dive No. on that day, percentage of oxygen, average depth, maximum depth and water temperature at maximum depth are displayed in the two separate dive log displays. ● Details of up to 30 dives can be stored in memory.
WARNINGS SHOWN IN DIVE LOG DISPLAY Indication Warning English HOW TO USE DIVE COMPUTER FUNCTIONS Description Ascent rate warning It appears if the rate of ascent has exceeded the specified value two times in a row. Decompression warning It appears if you have exceeded no-decompression limit and have made a decompression stop. Decompression stop violation warning It appears if you have exceeded no-decompression limit but have not made a decompression stop as indicated by the watch.
English HOW TO USE DIVE COMPUTER FUNCTIONS When more than 30 dives are made: ● If a new dive is made when log data of 30 dives are stored in memory, the log data for the oldest dive is erased from memory and the data for the new one is recorded in memory. ▼ C and D Press and hold at the same time. ● In that case, log No. for the existing data will be reduced by C one. Dive that is not recorded in the dive log function Even if the dive function is started by measuring a depth greater than 1.
English USE OF TERMS IN THIS MANUAL DEFINITION OF THE TERMS AND BASIC DESIGN OF THE WATCH Terms Depth Definition and basic design of the watch The watch measures the depth of water from 1.5 m (5 ft) up to 99.9 m (328 ft) in 0.1 m (1 ft) increments. The measurement is made on the basis of seawater having a specific gravity of 1.03. Ex.) Water temperature The watch measures and indicates dive time in one minute increments up to 599 minutes.
English EXPLANATION OF THE TERMS Explanation Terms Explanation Altitude rank Terms The pressure sensor measures the atmospheric pressure at regular intervals, and the watch indicates the altitude rank in four levels from 0 to 3. The measurable range of altitude is 0 ~ 6,000 m (19,700 ft). If the measurement is outside this range, the altitude rank indicator flashes.
Terms Explanation Terms Explanation Current water temperature The watch measures the water temperature every minute in 0.1° C (1° F) increments from -5.0° C up to +40.0° C (23° F up to 104° F). If the measurement is outside the range, “Lo” or “Hi” is displayed. The water temperature at the maximum depth is recorded in the dive log function. Decompression stop time The time period during which the diver should stay at the decompression stop depth.
English BATTERY CHANGE 3 Years The miniature battery which powers your watch should last approximately 3 years. However, because the battery is inserted at the factory to check the function and performance of the watch, its actual life once in your possession may be less than the specified period. When the battery expires, be sure to replace it as soon as possible to prevent any malfunction. It will be replaced at cost.
■ TEMPERATURES +60°C -10°C Your watch works with stable accuracy within a temperature range of 5°C and 35°C (41°F and 95°F). Temperatures over 60° C (140° F) or below –10° C (+14° F) may cause a slight time loss or gain or battery leakage or shorten the battery life. However, the above conditions will be corrected when the watch returns to normal temperature.
English 28 TROUBLESHOOTING Problem Possible cause Solution The display became blank. The battery has run down. Take the watch to the retailer from whom it was purchased immediately for battery replacement. ** The battery life indicator is shown. The battery life indicator is flashing. The battery is nearing its end. The watch gains/loses occasionally. The watch was left in low or high temperatures. The accuracy will be corrected when the watch returns to normal temperature.
Possible cause Solution The diver ascended defying the decompression stop violation warning. When the surface interval time is less than 5 minutes, making a decompression stop as indicated by the watch will return the display for no-decompression diving. English Problem The watch calculates decompression diving even after a dive. **The log data stored in the dive log function will not be erased when the battery is replaced with a new one.