Citizen D700 Instruction Manual download pdf (Page 23)

WARNING

Never dive in a manner that requires a decompression stop (decompression diving). If

decompression diving should happen to occur, immediately start to ascend while observing

an ascent rate of no more than 18 m/min. Make a decompression stop while ascending in

accordance with decompression stop instructions.

When making a decompression stop, never ascend to a depth less than the instructed

depth. In addition, since it is difficult to maintain a constant depth when there are high

waves and so forth, make decompression stops at depths a little deeper than the instructed

depth to prevent decompression sickness.

A permanent error (ERROR) occurs when continuing to dive while ignoring decompression stop

instructions during the course of decompression diving, and the watch will not switch to the dive

mode for 24 hours after that time.

2. Depth Measurement

This watch measures depth every second, and continuously displays the current depth in 0.1 m

units during the course of diving.

• Measuring range: 1 m to 80 m

* 0 m is displayed at depths of less than 1 m, while - -.- m is displayed at depths greater than 80 m.

* When an error has occurred in depth measurement during the course of diving, "ERR" and the diver mark

are alternately displayed until that dive is completed.

3. Dive Time Measurement

The elapsed time of dives made to a depth of more than 1 m is displayed. Measurement of dive

time starts automatically when the depth exceeds 1 m for the first time, and stops when the

depth again is less than 1 m. However, if a dive is resumed to a depth of more than 1 m within

10 minutes from the time measurement of dive time stopped, dive time is continued to be

measured from the time measurement stopped. Dive time is displayed for up to 9 minutes 59

seconds from the start of measurement in 1 second units. Beyond that time, dive time is

displayed in 1 minute units.

• Measuring range: 0 minutes 00 seconds to 999 minutes 59 seconds

4. Water Temperature Measurement

The watch starts to measure water temperature beginning 1 minute after the depth exceeds 1.0 m,

and measures at 1 minute intervals during the course of diving. The most recently measured

water temperature is displayed in 1°C units during the time button (A) is pressed during the scuba

diving display. (The water temperature measured in 0.1°C units is displayed after rounding to the

nearest 1°C unit.)

• Measuring range: -9.4°C to +40.0°C

5. No. of Dives Per Day and Recording Log Data

A maximum of 15 sets of log data can be recorded in a single day for both skin diving and scuba

diving. When the number of sets of log data exceeds 15, log data is no longer recorded during

diving. Even though log data is not recorded, the watch will continue to measure depth and

perform its various other functions during diving.

When the number of dives in one day is such that the number of skin dives is 15 or more and

the number of scuba dives is 14 or less, although the watch displays "FILE" when the dive is

started based on the judgment of the watch being used for skin diving, it judges that the watch is

being used for scuba diving 3 minutes later at which time "FILE" disappears from the display

and the dive is recorded as log data.

During scuba diving:

• The current time, water temperature and current body nitrogen level graph are displayed

during the time button (A) is pressed during no-decompression diving (except while the safety

stop graph is displayed).

A graph serving as a general reference for changes in depth during safety stop and the elapsed

time during a safety stop are displayed after having descended to a depth of more than 5 m and

then ascended to a depth of 5 m during scuba diving (no-decompression diving).

Reading the Safety Stop Graph

The horizontal axis of the graph represents elapsed time, while

the vertical axis represents changes in depth over a range of 3

m to 7 m centering around a depth of 5 m.

<Case of Decompression Dive Display when No-Decompression Limit Time has

been Exceeded>

• When diving beyond the no-decompression limit time, an alarm sounds and an instruction to

make a decompression stop (STOP) is displayed on the display, indicating that

decompression diving has resulted.

• The current time and maximum depth are called up during the time button (A) is pressed

during the decompression dive display (except during display of the decompression stop

graph).

• The watch returns to the no-decompression dive display when the instruction to make a

decompression stop is followed.

A graph serving as a general reference for changes in depth is

displayed during a decompression stop at a depth of ±1 m of

the decompression stop instructed depth.

Reading the Decompression Stop Graph

The horizontal axis of the graph represents elapsed time, while the

vertical axis represents changes in depth over a range of ±1 m from the

decompression stop instructed depth.

118 119

Dive time

Max. depth

o-decompression limit

(NDL) time

Current

depth

Dive time

Current time

Body nitrogen

level graph

While button (A) is pressed

Current

depth

Current water

temp.

Dive time

Instructed time

Instructed depth

Total

ascent time

Current

depth

Dive time

(A)

Current time

Max. depth

While button (A) is pressed

Current depth

Safety stop

graph

Safety

stop time

Decompression stop graph

Instructed

time

Instructed depth

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 35 36

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Citizen D700 Instruction Manual Page 23

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