Manual Seiko DH33 (page 3 of 15) (English)

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English

PRECAUTIONS FOR DIVING

●Strictly observe the precautions below to enjoy safe diving with the SEIKO Diving Computer Cal. DH33.

●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.

* While making a decompression stop, be sure to check the

amount of air remaining in your tank.

●The watch does not indicate the amount of air in your tank.

Use a submersible pressure gauge to check it.

●For safety’s sake, use other diving equipment such as dive

computer, depth gauge and another diver’s watch together

with the watch.

●The watch cannot serve as your “buddy”. Abide by the rules

of scuba diving, and never dive alone even if you have the

watch on your wrist.

●Abrupt change of altitude after diving is extremely hazardous

to your health. Do not move across the altitude ranks that the

watch indicates.

●Check that:

•the watch is operating normally.

•there are no visible scratches or cracks in the band and

crystal.

•the band is securely fastened to the watch case.

•the battery life indicator (battery mark) is not shown on

the display.

•all segments of the display are not flashing.

•the altitude rank mark is not flashing.

•not all nine residual nitrogen indicator bars are lit up.

* If you find any malfunction, do not use the watch for diving.

IN GENERAL

BEFORE DIVING

19.4 m x 1.03/1.00 ≒ 20.0 m (66 ft)

●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 measure the

depth of water accurately. Soak it in water for approximately

5 minutes before using it for diving.

●Be sure to check that the actual percentage of oxygen in your

tank (FO2) is properly set for the watch. FO2 cannot be

readjusted while you are underwater.

●Check that the measurement units of depth and temperature

are set according to your requirement. They can be selected

from “meters (m) and centigrade (° C)” and “feet (ft) and

Fahrenheit (° F)”.

●Take care not to hit the watch against hard objects such as

rocks.

●Check that the watch indicates the current depth properly. If

“- - -” or “Err” is shown when the current depth is less than 100

m (329 ft), stop using the watch immediately, and use other

diving equipment such as diving computer, depth gauge and

another diver’s watch you have with you.

●While in the dive mode, the display cannot be changed over to

modes other than time/calendar by pressing button “C”.

●Depending on the aquatic environment where the watch is

used, the beeping sound of the regular alarm and warnings

may or may not reach your ears.

●The watch measures the depth of water on the basis of

seawater having a specific gravity of 1.03. When it is used in

fresh water such as lakes, therefore, the displayed depth

should be corrected by multiplying it by 1.03. No-

decompression limits, however, will be calculated and

displayed normally without any adjustment.

Ex.) If the displayed depth of the water is 19.4 m (64 ft) in fresh

water (specific gravity 1.00), the actual depth is:

WHILE 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. Do not use anything

with a pointed tip to pick it out or an air blast to blow it out. If

it sticks in the pressure sensor and cannot be washed out,

consult the retailer from whom it was purchased.

●Be careful not to expose the pressure sensor to solvents such

as alcohol and gasoline, as this will cause malfunctions.

●When the surface interval time is less than 10 minutes, time/

calendar setting, FO2 setting and hour correction cannot be

made.

●If the measurement exceeds 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

PRECAUTIONS FOR DIVING ..................................... 4

FEATURES .................................................................. 6

BUTTONS AND DISPLAY CHANGE .......................... 7

HOW TO USE TIME FUNCTIONS .............................. 8

■TIME/CALENDAR FUNCTION ................................. 8

TIME/CALENDAR SETTING .......................................... 8

■REGULAR ALARM FUNCTION ................................ 9

REGULAR ALARM SETTING ........................................ 9

ENGAGEMENT/DISENGAGEMENT OF

REGULAR ALARM AND HOURLY TIME SIGNAL ......... 9

■ILLUMINATING LIGHT ............................................. 10

■HOUR CORRECTION FUNCTION ............................ 11

HOW TO USE THE HOUR CORRECTION FUNCTION . 11

HOW TO USE DIVE COMPUTER FUNCTIONS ......... 12

■NITROX DIVING FUNCTION ................................... 12

HOW TO SET FO2 ...................................................................................... 12

■ALTITUDE COMPENSATION .................................. 14

■SELECTION OF MEASUREMENT UNITS ............... 14

HOW TO SET THE DEPTH & TEMPERATURE UNITS .. 14

■DIVE PLAN FUNCTION ............................................ 15

HOW TO USE THE DIVE PLAN FUNCTION .................. 15

■DIVE FUNCTION ....................................................... 16

DISPLAY WHILE DIVING .............................................. 16

DISPLAY AFTER A DIVE ............................................... 19

■DIVE LOG FUNCTION .............................................. 20

HOW TO RECALL LOG DATA ...................................... 20

USE OF TERMS IN THIS MANUAL ........................... 23

DEFINITION OF THE TERMS AND BASIC DESIGN

OF THE WATCH ............................................................ 23

EXPLANATION OF THE TERMS ................................... 24

BATTERY CHANGE .................................................... 26

TO PRESERVE THE QUALITY

OF YOUR WATCH ...................................................... 27

TROUBLESHOOTING ................................................. 28

SPECIFICATIONS ........................................................ 29

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