Seiko DH33 - Manual (Page 8)

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English
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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.
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”.
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.
▼
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 no-
decompression 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 FO 2 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.
* 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.
WARNING
● Before using the dive plan function, be sure to check the gas mixture of your scuba tank, set FO
2 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 FO 2 you have set, current altitude rank and residual nitrogen during surface interval.
Press to show DIVE PLAN display.
or Press to select the desired depth rank.
• “+” and “–”
appear near
buttons C and
D, respectively.
No-decompression limit FO 2 you have set
Depth rank
• “9 m” / “30 ft”
is displayed
first.
▼
HOW TO USE THE DIVE PLAN FUNCTION
■ ALTITUDE COMPENSATION ■ SELECTION OF MEASUREMENT UNITS ■ DIVE PLAN FUNCTION
HOW TO USE DIVE COMPUTER FUNCTIONS HOW TO USE DIVE COMPUTER FUNCTIONS