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14

English

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.

Altitude rank indicator

Altitude

rank

0

1

2

3

Measurement

error

(Flashing)

Indicator

Nil

0 ~ 900

m

0 ~ 3000

ft

600 ~ 1700

m

2000 ~ 5500

ft

Altitude

above

sea level

1300 ~ 2500

m

4300 ~ 8200

ft

2200 ~ 6000

m

7200 ~ 19700

ft

6001 m and

higher

19700 ft and

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
surface.  This is not a malfunction.

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.

A

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”.

B

B

A

Depth unit

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.

ALTITUDE COMPENSATION

SELECTION OF MEASUREMENT UNITS

HOW TO USE DIVE COMPUTER FUNCTIONS

Содержание DH33

Страница 1: ...e ce livret avant d utiliser cet appareil SEIKO Conservez cette brochure de mani re pouvoir la consulter au besoin Grazie per aver acquistato questo orologio computer per immersioni SEIKO Cal DH33 Per...

Страница 2: ...he watch provides The watch also provides data for Nitrox diving Do not use the watch for Nitrox diving unless you are specially qualified to dive with Nitrox having full knowledge of the potential ha...

Страница 3: ...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 s...

Страница 4: ...ving IN GENERAL BEFORE DIVING If the temperature of the watch is much higher than that of the water for example after having been left under direct sunlight before being put in water the watch may not...

Страница 5: ...eeds the measurable range of the watch all the segments of the display flash In that case the watch cannot be used for diving for 48 hours after the dive is over AFTER DIVING CONTENTS Page WARNING 2 P...

Страница 6: ...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 Altitude compensation The watch measures t...

Страница 7: ...CORRECTION function Press button A Press button A Recalling log data Planning the next dive Press button A Press button A DIVE PLAN function DIVE LOG function Press button A Auto switch Water contact...

Страница 8: ...TIME CALENDAR SETTING display all the segments of the display will light up This is not a malfunction Press button A B C or D to return to the TIME CALENDAR display and set the time calendar again Pr...

Страница 9: ...untouched in the REGULAR ALARM SETTING display the display will automatically return to the TIME CALENDAR in 1 to 2 minutes 2 When the digits are adjusted in the REGULAR ALARM SETTING display the ala...

Страница 10: ...w the REGULAR ALARM display to engage or disengage them as required following the procedure above D Press in the displays other than DIVE PLAN and DIVE LOG to turn on the illuminating light D The disp...

Страница 11: ...d 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 With each press of buttons C or D 30 minutes...

Страница 12: ...ng 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...

Страница 13: ...the previous day and the date has changed to the next a flashing Nx is shown on the display In that case be sure to set FO2 newly before the next dive according to the gas mixture of your scuba tanks...

Страница 14: ...d 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...

Страница 15: ...th rank the watch calculates and displays a corresponding no decompression limit WARNING Before using the dive plan function be sure to check the gas mixture of your scuba tank set FO2 accordingly and...

Страница 16: ...G on page 4 Also be sure to set FO2 according to the gas mixture of your scuba tank FO2 cannot be re adjusted while you are underwater Select the measurement units of depth and temperature as you requ...

Страница 17: ...icates It is in violation of the decompression stop warning and the watch will not count down the decompression stop time and total ascent time even if you make a stop during ascent Even after the wat...

Страница 18: ...ime and DECO all flash and the warning sound beeps for 3 seconds When you return to a depth deeper than the decompression stop depth the watch starts counting down the decompression stop time PO2 limi...

Страница 19: ...asures the current depth of greater than 1 5 m 5 ft within 10 minutes after this display is shown the previous and the new dives are considered inseparable and the dive times of both dives and the sur...

Страница 20: ...at end of dive Date of dive December 6 Dive No on that day Exit time 20 1 denotes the 1st dive log display for the 20th dive 20 2 denotes the 2nd dive log display for the 20th dive C D C or D Press to...

Страница 21: ...ion warning It appears if you have exceeded no decompression limit but have not made a decompression stop as indicated by the watch It appears if the partial pressure of oxygen PO2 has exceeded 1 5 PO...

Страница 22: ...ter than 1 5 m 5 ft a dive that lasts less than 3 minutes will not be recorded How to erase the log data in memory The entire log data stored in memory can be erased as required Press to show DIVE LOG...

Страница 23: ...ncrements from 5 0 C up to 40 0 C 23 F up to 104 F The water temperature recorded in the dive log function is a measurement taken at the maximum depth Water temperature Surface interval time SURF T Th...

Страница 24: ...gas mixture of the scuba tank which the diver needs to set for the watch before diving For diving with air Air 21 should be set FO2 can be set from 22 to 50 and if a value within this range is set th...

Страница 25: ...to a depth shallower than the indicated depth a decompression stop violation warning is given Residual nitrogen at end of dive Residual oxygen at end of dive De compression stop depth The time period...

Страница 26: ...ed at a SEIKO SERVICE CENTER For safety s sake the watch will also undergo a strict check on its water resistant quality and depth measurement function in addition to battery replacement Therefore it...

Страница 27: ...bracelet wipe them periodically with a soft dry cloth PERIODIC CHECK 2 3 Years It is recommended that the watch be checked once every 2 to 3 years Have your watch checked by an AUTHORIZED SEIKO DEALE...

Страница 28: ...residual nitrogen will be taken into consideration in calculations in the dive plan function The atmospheric pressure inside airplanes corresponds to altitude rank 2 and the watch has re calculated t...

Страница 29: ...ery low temperatures the display light may dim and the change of digits may become slow 4 Display system TIME CALENDAR display Hour minutes seconds month date and day surface interval time and desatur...

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