Bedienungsanleitung Seiko DH33 (Seite 13 von 15) (Englisch)

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EXPLANATION OF THE TERMS

Terms Explanation Terms Explanation

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.

Current

water

temperature

Water

temperature

at maximum

depth

Residual nitrogen at the end of a dive is

recorded in the dive function and indicated

graphically by the number of bars.

Residual oxygen at the end of a dive is

recorded in the dive function and indicated

graphically by the number of bars.

The depth at which the diver should make a

decompression stop. It is calculated on the

basis of the diving data collected during the

dive, and selected from 15, 12, 9, 6 and 3 m

(50, 40, 30, 20 and 10 ft). If the diver ascends

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 during which the diver

should stay at the decompression stop depth.

It is calculated on the basis of the diving data

collected during the dive, and is counted

down while the decompression stop is being

made.

De-

compression

stop time

The minimum time required to stay

underwater before surfacing, including the

decompression stop.

Total

ascent

time

PO2 is calculated on the basis of the depth

and the FO2 setting (percentage of oxygen in

gas mixture). When PO2 exceeds 1.5, a

warning is given.

PO2

(Partial

pressure of

oxygen)

The amount of excess oxygen in the diver’s

body is indicated graphically in 9 levels by

the number of bars shown on the display.

In nitrox diving, the diver is exposed to

higher levels of oxygen. If all the indicator

bars light up, ascend to a shallower depth,

as you are in danger of suffering from oxygen

toxicity.

Oxygen

limit

indicator

EXPLANATION OF THE TERMS

ExplanationTerms

No-de-

compression

limit (NDL)

The maximum time during which the diver

can stay at the current depth or in the selected

depth rank without decompression

procedure. The watch indicates NDL up to

200 minutes.

In the DIVE PLAN display, if you choose a

depth rank where the partial pressure of

oxygen exceeds 1.6, “– –” is displayed in

place of NDL.

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

Altitude

rank

The amount of nitrogen absorbed by the

diver’s body is indicated graphically in 10

levels from 0 to 9 by the number of bars

shown on the display. When all 9 indicator

bars light up, the watch calculates

decompression diving.

Residual

nitrogen

indicator

The time required for the excess amount of

nitrogen accumulated in the diver’s body

during a dive to be eliminated completely. It

is indicated in hours and minutes, and the

watch counts it down. Desaturation is

considered to be completed when the

countdown is over.

Desaturation

time

FO2

(Percentage

of Oxygen)

The percentage of oxygen in the 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, the watch calculates nitrox

diving, and the nitrox mark “Nx” is shown

on the display. The set FO2 is recorded in the

dive log function.

If the watch is left untouched with “Nx”

shown on the display after a dive, it starts

flashing on the next day to indicate that FO2

should be re-set. Otherwise, “– –” is shown

in place of the previous FO2 setting, and the

watch cannot be used for diving.

Nitrox

mark

Depth rank For planning a dive, the depths from 9 m to

48 m (30 ft to 160 ft) are divided into 14 ranks

in 3 m (10 ft) increments.

The order of diving data stored in memory.

Details of up to 30 dives can be recorded.

The log data of a dive is shown in two

separate displays. They have different log

Nos. such as “30-1” and “30-2”.

Log No.

The number of dives made on the same day.

It is recorded in the dive log function.

Number of

dives on

that day

The time when the dive is started. The watch

records the time when the diver descends to

a depth of more than 1.5 m (5 ft).

Entry time

Exit time The time when the dive is finished. It

corresponds to the hour and minute when

the diver ascends to less than 1.5 m (5 ft)

underwater.

The average depth is calculated from the

depth data measured during a dive. It can be

checked in the dive log function.

Average

depth

The greatest measurement of depth during

a dive.

Maximum

depth

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