Seiko DH33 Manual - Page 8

English HOW TO USE DIVE COMPUTER FUNCTIONS ■ ALTITUDE COMPENSATION ● This watch has a built-in pressure sensor to measure the 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. ● As you move across altitude ranks, the watch re-calculates residual nitrogen on the spot. ■ SELECTION OF MEASUREMENT UNITS ● The measurement units of depth and temperature can be selected from "meters (m) and centigrade (° C)" and "feet (ft) and Fahrenheit (° F)". HOW TO SET THE DEPTH & TEMPERATURE UNITS Press to show DIVE PLAN display. Altitude rank indicator Altitude rank 0 1 2 3 Measurement error Indicator Altitude above sea level Nil (Flashing) 0 ~ 900 600 ~ 1700 1300 ~ 2500 2200 ~ 6000 6001 m and m m m m higher 0 ~ 3000 2000 ~ 5500 4300 ~ 8200 7200 ~ 19700 19700 ft and ft ft ft ft higher Notes: 1. The altitude range in the above table provides general guideline of altitude only, and the altitude rank indication does not indicate a specific altitude. 2. If the watch senses an altitude change across altitude ranks, the residual nitrogen indicator may appear even while you are on the 14 surface. This is not a malfunction. Depth unit ▼ Press for 4 to 5 seconds to change over the depth and temperature units. * With each press of the button, the units of depth and temperature change over alternately between "meters and centigrade" and "feet and Fahrenheit". Note: Once the units of depth and temperature are set in the DIVE PLAN display, those in the DIVE LOG display and the DIVE mode will also be set accordingly. English ■ DIVE PLAN FUNCTION 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. ● In feet : 30 ft, 40 ft, 50 ft, 60 ft, 70 ft, 80 ft, 90 ft, 100 ft, 110 ft, 120 ft, 130 ft, 140 ft, 150 ft and 160 ft. ● No-decompression limits are calculated according to FO2 you have set, current altitude rank and residual nitrogen during surface interval. HOW TO USE THE DIVE PLAN FUNCTION Press to show DIVE PLAN display. No-decompression limit FO2 you have set ▼ or Depth rank • "9 m" / "30 ft" is displayed first. Press to select the desired depth rank. • "+" and "-" appear near buttons C and D, respectively. * With each press of buttons C and D, the depth rank advances and moves back by one rank, respectively. It changes quickly by keeping the respective buttons pressed. * As you select a depth rank, the watch calculates and displays a corresponding no-decompression limit. Notes: 1. The display cannot be changed over to the DIVE PLAN for 10 minutes after a dive. 2. Please note that it may take some time to calculate nodecompression limits. 3. During surface interval: While the watch counts down the desaturation time during surface interval, surface time and desaturation time are also shown in the DIVE PLAN display. Surface time Desaturation time 4. When planning a dive with nitrox: Depending on the FO2 setting, "- -" appears in place of no- decompression limit for a depth rank. It indicates that the selected depth rank exceeds the maximum depth to which you can descend with the gas mixture you have set. 15