Cressi EDY User Manual

ENGLISH

3.3.3.- CNS toxicity display (OLI) . . . . . . . . . . . . . . . . . . . . . . pag. 211

3.3.4.- PO2 alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pag. 211

3.4. - Curve dive (Non decompression Dive). . . . . . . . . pag.212

3.4.1. - Ascent rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pag.212

3.4.2.- Safety stop (STOP). . . . . . . . . . . . . . . . . . . . . . . . . . . . pag.213

3.4.3.- Decompression forewarning ( ) . . . . . . . . . . . . pag.213

3.5. - Decompression dive (DECO) . . . . . . . . . . . . . . . . . . . pag.213

3.5.1. - Omitted decompression stage alarm . . . . . . . . . . pag.214

3.6. - GAGE (or depth gauge/timer) program . . . . . . . . . . pag.215

3.6.1. - Timer function starting . . . . . . . . . . . . . . . . . . . . . . . pag.215

3.7. - FaEE (or apnoea) program . . . . . . . . . . . . . . . . . . . . pag.216

3.7.1. - Surface interval (SURF) after apnoea /

Apnoea historic memory (HIST). . . . . . . . . . . . . . . . . pag.217

3.7.2. - Apnoea dives historic memory (HIST) reset . . . . . . pag.218

4. - ON SURFACE AFTER A DIVE

4. - On surface after a dive/Data processing . . . . . . . pag.220

4.1.1. - Surface interval after a DIVE program dive

( , , ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pag.220

4.1.2. - Surface interval after a GAGE program dive. . . . . . . pag.220

4.1.3. - Surface interval after a FAEE program apnoea. . . . pag.221

4.2. - Dives logbook LOG . . . . . . . . . . . . . . . . . . . . . . . . . . . pag.222

4.2.1. - DIVE program logbook . . . . . . . . . . . . . . . . . . . . . . . . pag.222

4.2.2.- GAGE program logbook. . . . . . . . . . . . . . . . . . . . . . . . pag.223

4.2.3.- FAEE program logbook . . . . . . . . . . . . . . . . . . . . . . . . pag.224

4.3. - Dives historic memory HIST . . . . . . . . . . . . . . . . . . . . pag.225

4.3.1. - DIVE program dives historic memory. . . . . . . . . . . . pag.225

4.3.2.- GAGE

program dives historic memory . . . . . . . . . . . pag.226

4.3.3.- FAEE program apnoeas historic memory . . . . . . . . pag.226

4.4. - Dive profile PAOF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pag.227

4.5. - Data PC transfer: compatible PC interface PC . . . pag.227

4.6. - Instrument reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . pag.228

ENGLISH

• CNS oxygen toxicity graphic indicator

• Back-luminescent display

• Incorporated calendar and clock with alarm and time zone

functions

• Logbook (30 hours or last 60 dives) including dive profile

• Dive historic memory

• The instrument may be fully reset, in case of renting

• PC interface (accessory)

1.2. - SAFETY MEASURES.

1.2.1. - Definition of: danger, warning and note.

This handbook presents special notes in order to stress out
very important information.

Before reading the present handbook, please read and
understand well following definitions:

 DANGER: indicates a situation (or a procedure), that

might be dangerous to the divers’s health and life itself.
WARNING: indicates a situation (or a procedure), that

might be dangerous to the diver or damage the instrument.

NOTE: stresses important information.

1.2.2. - General recommendations and safety

measures

WARNING: please read the instructions! Read carefully

the present handbook, including the safety measures
paragraphs. Please be sure of perfectly understanding
your instrument’s use, functions and limits before using it!

WARNING: by diving, please be equipped as well with a
depth gauge, a manometer, a timer or watch and dive
tables. Please always check your diving cylinders’ pressure
to be fit to the planned dive and, while diving, often check
the cylinders’ air capacity by means of your manometer.

 DANGER: do not dive at high altitudes before the

instrument has automatically started the program corre­sponding to the altitude at which you are. Please check the
altitude level on the display. Please remember that diving at
higher altitudes than 9.842 ft. above sea level involves a
remarkable increased risk of decompression sickness.

 DANGER: before flying, please wait until the icon "No

Fly Time" on your computer display has disappeared.
WARNING: the present instrument’s use is strictly perso-

nal; the information it supplies refer, in fact, exclusively to
the individual who used it during a dive or a series of dives.

 DANGER: Cressi-sub discourages the use of this

instrument in decompression dives. In the event that no
decompression has been exceeded, Cressi-sub
computer would be able to supply any information related
to decompression, surfacing and surface interval times.

WARNING: please do not dive using Nitrox mixtures
without checking the content and correct O2 percentage
(FO2). Set your computer with such value, so that it may
correctly process the data; please be advised that the
computer does not accept FO2 decimal values: approxi­mate to the nearest whole number below! (i.e. 35.8% must
be approximated to 35%).

ENGLISH

WARNING: Cressi-sub discourages apnoea dives without
proper training, since the instrument does not replace a
correct information on apnoea diving physiology and risks,
which might be very dangerous to the diver’s safety.

 DANGER: Cressi-sub strongly recommends to avoid

any apnoea diving after snorkel dives. Moreover, at least
two hours should elapse since the end of a snorkel dive
before starting an apnoea dive, which anyway should not
exceed the allowed maximum depth of 16 ft.

NOTE: if is set on FAEE (apnoea) program, it is possible
to set DIVE program (both air and nitrox), while it is not possible
to set GAGE during the 48 hours elapsing since last apnoea dive.

As a result of technological advancements/changes, Cressi­sub reserves the right to modify the instrument without noti­fication.

Cressi-sub underwater computer may be connected
to a compatible IBM personal computer, by means of a
Cressi-sub interface (accessory) and the related Cressi PC
Logbook software (accessory).

Please note that it is very important to read and clearly under­stand this user’s manual; on the contrary , serious damages to
your health might occur. The present manual will lead the
user to understand all the computer’s functions before using
it while diving.

Cressi-sub computer’s watch and calendar function
are always on (see picture 1), and the related battery con­sumption is unnoticeable.

Operational functions are easily visible either by depressing
buttons A ( ), B ( ), C ( ), D (),
which will be referred to with the letters A, B, C, D or, under­water, when the contact E gets wet (the dive program turns
on at depths greater than 4 ft.): they are clearly illustrated by
the figures on the display.

NOTE: keep the contact E always clean, remove dirt or
oxide, that might cause its bad functioning, since the set
program would not automatically start. It is recommen­ded to clean the contact. E from time to time, by rinsing it
in fresh water using a soft brush. Dry the instrument, using
a soft cloth.

ENGLISH

AD

C

B

E

ENGLISH

2.2. - Clock functions.

2.2.1. - Clock display.

‘s clock display is always on, and the related battery
consumption is unnoticeable. It shows, in its central part, the
time in hours and minutes; at the bottom, the seconds; at the
top, the week’s day, the calendar’s month and day (picture 1).
This display stays on until the computer gets into water, and
the previously set program starts up.

Depressing button B engages the display back-illumination,
while keeping button C depressed the time related to a pre­viously set time zone (DUAL) will be shown (see picture 2).

By depressing button C after a

DIVE, program dive, the display

will show, in its central part, the time related to a previously set
time zone (DUAL), at the top, the surface time and the de­saturation time besides the “Don’t Fly” icon.

Related topics:

• 2.2.2.- Time zone setting.

• 3.1. - DIVE program

• 4.1.1. - Surface interval after a DIVE program

2.2.2. - Time zone setting.

To set a time zone, please depress button A ( ) in
sequence until the (DUAL) icon appears on ’s

display.
By depressing button C ( ) the time zone starts
flashing, waiting for its setting by respectively depressing but­ton C ( ) to advance, or button D ( ) to move
back the hour related to the time zone.
Depress button A ( ) for some seconds in order to
return to the normal clock display (picture 1).

use. Although, it must always be checked that the appropria­te altitude adjustments have occurred. The function is carried
out automatically, updating every 10 minutes the atmosphe­ric pressure values and showing the related altitudes levels as
follows:

no icon ( ) - from 0 - 2.625 ft. (picture 1)

-

from 2.625 - 5.250 ft. (picture 1-a)

- from 5.250 - 7.874 ft. (picture 1-b)

- from 7.874 - 19.685 ft. (picture 1-c)

- more than 19.685 ft - out of range

Each icon indicates that the computer has automatically modi­fied its own mathematical model to adjust to proper altitude.

 DANGER: Diving at altitudes greater than 9.842 ft.

above sea level involves an increase risk of decompres­sion sickness.

It should be noted that at higher altitudes the nitrogen balan­ce between the human body and the environment is altered.

It is therefore recommended to wait some hours after arriving
before diving, in order to allow a partial release of the excess
nitrogen from your body. The atmospheric pressure at higher
altitudes is in fact lower than at sea level: the diver has addi­tional nitrogen in his body than at the lower altitudes. The
excess is gradually released and the balance re-established
within a couple of days.

At this point, it is important to check:
the low battery indicator should not be on or flashing (picture

4 a-b);
the computer is operating, displaying all liquid crystal segments.

ENGLISH

• PO2 is the maximum partial oxygen pressure, which may be

set by the user on values between 1.0 bar (included) and 1.6
bar (included), by variations of 0.1 bar, obtained at each
depression of button D ( );

WARNING: PO2 is preset on a basic value (default) of 1.4
bar, for both air dives and Nitrox dives. In such way, the
diver is safeguarded since he is following the most conser­vative values recommended for sport diving. Although,
other PO2 values may be set, as shown in chapter 3.3. The
set value will be memorized in the computer until the diver
chooses a different setting.

• FO2 is the oxygen percentage of the Nitrox mixture. The

diver may vary it on values between FO2=Air (21%) – basic
setting - and FO2=50 % (included), by variations of 1%,
obtained at each depression of button D ( );

NOTE: during the phase of parameters setting, by
depressing button D ( ), the computer will automati­cally stop on standard Nitrox 1 mixture (EAN 32), with an
oxygen percentage of 32%. By keeping button D ( ),
depressed, it will stop again on (Air) setting. This is to quic­ken the setting process. Of course, you may set any other
FO2 value, by variations of 1% at each depression of but­ton D ( ), or by quicker increments by keeping the
button depressed.

NOTE: by varying the mixture’s oxygen percentage, the
computer indicates as well the maximum depth (MAX)
which may be reached with that mixture – it depends also
on the set PO2 value (picture 5).

• A Safety Factor may be set by the divers on three values

(SF0/SF1/SF2), obtained at each depression of button D

air; picture 7b, Nitrox) no decompression depths times bet­ween 30 and 157 ft., in depth increments of 10 ft. obtained by
depressing button C ( ), or by manual depth
decreases - each of 10 ft. - by depressing button D ( ).

Depress button A ( ) for some seconds in order to get
back to the normal display (picture 1).

NOTE: PLAN function is switched off in GAGE and FAEE pro-
grams and if the computer shows Error.

Related topics:

• 2.4.1. - DIVE program parameters setting

• 3.4. - Curve dive.

• 3.5.1. - Omitted decompression stage alarm. (Error)

• 4.1.1. - Surface interval after a DIVE program.

• 6.1. - Decompression tables

2.5. -

GAGE

(or depth gauge/timer) program para-

meters setting

Cressi-sub computer is equipped with a GAGE (or depth
gauge/timer) program, intended for all those divers who want
to use the instrument as a depth gauge and timer. In such
case, supplies the dive basic parameters, that is depth
and dive time, it may engage a timer function, but it does not
make any computation of tissues saturation and de-satura­tion, that must be planned and computed by means of proper
software and/or tables.
By the way, la Cressi-sub reminds you that sport dives must be
carried out within the no-decompression guidelines and at the
maximum depth of 132 ft.. This is the limit of sport diving: to
exceed such limits increase the risk of decompression sickness.

ENGLISH

NOTE: in GAGE function the depth gauge supplies indications
between 0 and 655,8 ft.

Related topics:

• 2.7.1. - Maximum depth alarm

• 3.6. - GAGE (or depth gauge/timer) program

2.6. -

FAeE

(or APNOEA) program parameters setting

Cressi-sub computer is equipped with a FAeE (or
apnoea) program, intended for all those divers who want to
use the instrument for apnoea diving, provided they got pro­per training on all the necessary techniques.

WARNING:

Cressi-sub discourages apnoea dives without
proper training, since the instrument does not replace a cor­rect information on apnoea diving physiology and risks,
which might be very dangerous to the diver’s safety.

NOTE: apnoea diving, especially when deep and protrac­ted, may cause serious risks to occur, as for example pro­longed apnoea syncope, which may cause a sudden and
very dangerous loss of consciousness.

 DANGER: Cressi-sub strongly recommends to avoid

any apnoea diving after snorkel dives. Moreover, at least
two hours should elapse since the end of a snorkel dive
before starting an apnoea dive, which anyway should not
exceed the allowed maximum depth of 16 ft.

To get to FAeE program depress button A ( ) until the
DIVE menu is visualized, then depress button C ( ),
making the DIVE icon flash. Lastly, depress button D ( ),
and the FAEE will appear (picture 28).

During an apnoea dive, supplies the dive’s basic para-

alarm. The computer is preset on the values of 131 ft. and OFF.
At the end of the dive FAEE program processes the
apnoea dives data using its functions of (LOG) - dive logbook
(chapter 4.2.). (HIST) - dive historic memory (chapter 4.3.) and
(PAOF) - Dive profile (chapter 4.4.). Such functions are specific

for any set program and include a processing memory of
their own which does not affect the computer other
processing programs.
It is possible to reset the daily apnoea memory’s content
(HISTORY), by following the procedures shown in chapter 3.7.2
FAEE program will be memorized in the computer until the
diver changes the program.

Depress button A ( ) for some seconds to revert back
to the normal display (picture 1).

Related topics:

• 2.7.1. - Maximum depth alarm

• 3.7. - FAEE (or apnoea) program

2.7. - Instrument general setting.

2.7.1. - Maximum depth alarm.

All computer ’s programs are equipped with a preset
maximum depth alarm (picture 6b DIVE - program; picture 8a ­GAGE program; picture 8b - FAEE program) on a value of 132 ft.

limit sport dives. When the function is on (ON), upon reaching
the set maximum depth, a sound alarm will start and the dis­play will flash for three seconds

It is possible to switch on the alarm or vary the maximum
depth: first set the program you want to use by depressing
button A ( ) until the related menu is displayed (picture

ENGLISH

Related topics:

• 2.2. - Clock function

• 4.2. - Dive logbook (LOG)

2.7.3. - Units of measure setting.

Cressi-sub computer can make computations both by
metric units (depth in meters and temperature in °C) and by
feet units (depth in feet and temperature in °F).

To change the units of measure, depress button A ( )
in order to get to the first menu of (DIVE) program (picture 5).
Then, depress button C ( ), making the (DIVE) flash.

At this point, depress buttons C+D in sequence and keep
them both depressed for about 6 seconds. While doing so,
PO2 value will be flashing, a sound alarm will start and the
new unit of measure will be displayed.

Depress button A ( ) for some seconds to revert back
to the normal display (picture 1).

ENGLISH

Further important information are obtained by keeping button
A ( ) depressed by diving: they show (picture 12):

1 current PO2;
2 oxygen percentage of the selected mixture (Air if

FO2 = 21%);

3 maximum depth reached during the dive, in meters (m) or

feet (ft);

4 current temperature, in °C or °F

The display shows (

DATA

).

If you keep button C ( ) depressed, current time
will be displayed (picture 1) as follows:

1) Hours; 2) Minutes; 3) Seconds

NOTE: if the computer is used for air dives, no modifica­tion or setting of FO2 needs to be carried out before the
subsequent dive.

At any moment of your dive, should light conditions do not
allow you an easy reading of the display, it is possible to
switch on the back-illumination, by depressing button B
( ). The display back-illumination will last about 5
seconds and may be repeated any time you want. The bat­tery consumption is minimal.

Related topics:

• 2.4.1. - DIVE program parameters setting.

• 2.7.3. - Units of measure setting.

• 3.4.1. - Ascent rate.

• 3.3.3. - CNS toxicity display.

• 3.3.4. - PO2 alarms.

WARNING: under the same dive conditions, a Nitrox mix­ture requires longer no decompression times than air.
Although, it is strongly recommended to comply with the
maximum depth allowed by the selected Nitrox mixture.

Related topics:

• 2.4.1. - DIVE program parameters setting

• 2.7.3. - Units of measure setting.

• 3.3. - Nitrox parameters setting

• 3.3.3. - CNS toxicity display

• 3.3.4. - PO2 alarms

3.3. - Nitrox parameters setting.

3.3.1. - Partial pressure setting (PO2).

is preset on a basic PO2 value of 1.4 bar, in order to

guarantee the uppermost safety during any kind of dive.
Though, it is possible to vary the PO2 setting on values bet-

ween 1.0 bar and 1.6 bar. You just need to depress button A
( ) to get to the (DIVE) display, as shown in picture 5,

then depress button C ( ) to select the parame­ters you wish to vary according following order:

PO2 -> FO2 -> Safety Factor -> Max Depth -> OFF/ON

where PO2 is the oxygen partial pressure to be set by the
diver on values between 1.0 bar and 1.6 bar, by variations of

0.1 bar. The value is varied by depressing button D ( ).
Depress button A ( ) for some seconds to revert back

to the normal display (picture. 1).

ENGLISH

Depress button A ( ) for some seconds to confirm
the set percentage and revert back to the normal display
(picture 1).

NOTE: it is possible to vary the Nitrox mixture’s setting

even

during the surface interval

(de-saturation in pro-

gress)

This feature is very important, especially for divers who carry
out a series of subsequent dives: it allows to vary the mixture
after carrying out, for example, a first air dive, without having
to wait for the full de-saturation.

Though, it is important to clearly understand and comply with
the following

1 At the end of a dive, the previously set mixture oxygen

percentage FO2 will be stored in the memory

only

during
the first ten minutes of the surface interval. Another dive
carried out within this period of time will be computed as
a continuation of the previous dive - therefore, taking into
account same cylinder and same mixture.

NOTE: it is NOT possible to set any variation of the mix­ture FO2 within the first 10 minutes after ending a dive

In fact, it is not possible to get to the (

DIVE

) parameters setting
menu and therefore to vary the previously set percentage
within the first ten minutes of surface interval.

2 10 minutes after the completion of the dive, the computer

resets

the FO2 percentage on a safety value of 99%,
waiting for the diver to set the correct value relating to the
new mixture. The dive parameters setting will change as
shown in picture 14;

It is important therefore to understand, monitor and control
the oxygen toxicity level.

In order to reduce the risk of oxygen intoxication, dis­plays a graph which is easy to be read in any situation. When
the oxygen level reaches warning values, next to the maxi­mum allowable toxicity (corresponding to 7 of 8 lighted
pixels), the graph starts flashing along with the display and an
alarm starts sounding which lasts 15 seconds, showing the
proximity of a CNS toxicity level.

When the eighth pixel lights up as well, a second (100%)
alarm starts: the graph and display start flashing and an alarm
starts sounding, as long as the diver does not surface, and
the oxygen partial pressure does not decrease. Only when
the eighth pixel turns off, the graph stops flashing, while the
alarm will be entered in the Logbook.

NOTE: The result of the oxygen exposure computations
is approximated to the above percentage value.

Related topics:

• 3.1. - Air dive

• 3.2. - Hyper-oxygenated Nitrox mixture dive

• 3.3.1. - Partial pressure setting PO2.

• 3.3.2. - Nitrox mixture oxygen fraction (FO2%).

• 3.3.4. - PO2 alarms.

• 4.2. - Dive logbook

3.3.4. - PO2 alarms.

Cressi-sub computer is able to constantly monitor
another basic parameter relating to oxygen, and that is O2
partial pressure value (PO2). Oxygen toxicity may be caused
both by an excessive accumulation (CNS toxicity seen in the
previous chapter) and by exceeding the maximum PO2,

ENGLISH

Depth

No

segments

0.0 - 12.7 ft./min

0.0 - 19.3 ft./min

0.0 - 25.9 ft./min

3

segments

13.1 - 19.3 ft./min

19.7 - 25.9 ft./min

26.2 - 39 ft./min

6

segments

19.7-25.9 ft./min

26.2-39 ft./min

39.4-52.1 ft./min

8

segments

26.2 ft./min (SLOW)

39.4 ft./min (SLOW)

16.4 ft./min

3.4. – Curve dive.

3.4.1. – Ascent rate.

Cressi-sub computer’ s algorithm considers different
ascent rates according to the depth. The rate is shown on
the display by a segmented indicator at the right bottom,
which works according to the following table:

If during surfacing, the maximum allowed ascent rates are
exceeded, the display will show several segments, showing
the ascent rate increasing level. Moreover, an alarm will start
sounding and the display (picture 18) will show a
flashing (SLOW) icon. The segmented indicator will flash as well,
showing the ascent rate and the current depth value.

In this situation, surfacing must be stopped until the (SLOW) icon
disappears and the computer shows its normal display.

 DANGER: surfacing too fast dramatically increases the

risk of decompression sickness! Cressi-sub always
recommends a safety stop at the end of each dive, lasting
about 3-5 min at 10-20 ft., which will be assisted by the
computer (see chapter 3.4.2.)

WARNING: do not engage in a follow up dive after a sur­face interval if the (SLOW) icon has been on! The computa-

tions for the next dive might be invalidated by exceeding
the maximum ascent rate.

Related topics:

• 2.7.3. - Units of measure setting.

• 3.4.1. - Ascent rate.

3.4.3. – Decompression warning.

Any time the available no decompression time shown by the
“ ”, icon decreases to 3 minutes (picture 19), will
engage an alarm and the display will be flashing for several
seconds, warning the diver he is approaching no decom­pression limits, therefore beginning a decompression dive.

Related topics:

• 3.5. - Decompression dive.

3.5. - Decompression dive (

DECO

).

 DANGER: do not use this instrument to dive beyond

the no decompression limits! Cressi-sub discourages the
use of this computer for decompression dives.

In the event you have exceeded the no decompression
limits, Cressi-sub computer will assist you with specific
information related to surfacing correctly and related decom­pression stages. Upon exceeding the no decompression
limits, the computer will start an alarm lasting several
seconds, and the display will change as in picture 20, giving
the diver the following information:

1 DECO replaces the “ ” icon, showing that no decom-

pression has been exceeded and decompression stops
must be taken.

2 Depth of first decompression stage (

the deepest

), given
in meters (m) or feet (ft). It may vary from a minimum of
10 ft. to a maximum of 98,4 ft., by increments of 10 ft.

ENGLISH

3.5.1. - Omitted Decompression stage alarm

If the decompression stage is missed by exceeding the
depth given by the computer, an alarm will start sounding and
the display will be flashing until the diver descends back at
least to the proper depth (

ceiling

) or below it (picture 21a).

The computer allows a maximum time of 3 minutes to correct
this dangerous situation: during this time the alarm will be soun­ding to warn the diver. In the event that the diver does not
descend to the proper depth given by the computer, will
display “Error” (picture 21b) and won’t be usable for the next 48
hours. The only functions working will be the following:

Set Alarm -> Dual Time -> Log -> Hist -> Profile -> PC -> Set Time

In this situation, it is though possible, through PC function and
the accessory interface, to transfer the data contained in

’s memory.

 DANGER: should this happen, you must not dive for

the next 48 hours.

In the event you feel any symptoms of decompression sick­ness, you should contact DAN (Divers Alert Network) and
your local hyperbaric chamber, supplying all data related to
your dive.

Related topics:

• 3.1. - Air dive (DIVE Air)

• 3.2. - Hyper-oxygenated (Nitrox) mixture dive.

• 3.3.3. - CNS toxicity display

• 3.3.4. - PO2 alarms

• 3.5. - Decompression dive.

• 4.2. - Dive logbook.

• 4.5 - PC data transferring: compatibile PC interface

1 current depth value, in meters (m) or feet (ft). The depth

gauge operative range reaches a depth of 199,9 m (656 ft.)

2 dive time, shown by the "DIVE T" icon, given by the timer

in minutes and seconds.

3 maximum depth reached during the dive, given in meters

(m) or feet (ft), shown by the “MAX” icon

4 segmented ascent rate indicator
5 Maximum depth alarm icon (if ON - see 2.5.1)
6 GAGE computing program icon

7 Timer icon

Related topics:

• 2.5. - GAGE (or depth gauge/Timer) program parameters setting

• 2.7.1. - Maximum depth alarm

• 2.7.2. - Date and time adjustment

• 2.7.3. - Units of emasure setting.

• 3.6.1. - Timer function starting

• 4.1.2. - Surface interval after a GAGE program

• 4.2.2. - GAGE program logbook

• 4.3.2. - GAGE program dive historic memory

3.6.1. – Timer function starting

During a GAGE program dive, it is possible to start T imer function,
by depressing button D ( ); in this way a cronograph is
started, whose icon will be starting on the display (picture 23),
as long as it will be on. To stop the timer, you just need to
depress again button D ( ), to look at the time shown by
the timer, you need to keep button A ( ) depressed
and the display will show the following (picture 24):

1 time given in hours, minutes and seconds;

2 maximum depth reached during the dive, given in meters

(m) or feet (ft);

3 current water temperature, given in °C or °F ;

ENGLISH

 DANGER: Cressi-sub strongly recommends to avoid

any apnoea diving after snorkel dives. Moreover, at least
two hours should elapse since the end of a snorkel dive
before starting an apnoea dive, which anyway should not

exceed the allowed maximum depth of 16 ft.
It has already been shown in chapter 3.3. how to get to
computer’ s FAEE mode setting: it switches on automatically

when the computer gets underwater. In this situation the
computer’ s contact “E” is on, and its display changes, accor­ding to the situation, showing following information:

a) View of the first apnoea dive of the day (picture 31-a):

1 value of current depth, in meters (m) or feet (ft);

2 time of last apnoea dive, given in minutes and seconds by

the icon "DIVE T";

3 maximum depth reached during last apnoea dive, given in

meters (m) or feet (ft) by the icon “MAX”;
4 TOTAL number of apnoea dives performed during the day;
5 icon FAEE.

NOTE: the total number of apnoea dives performed during the
day will be reset automatically at midnight. It is though possible
to reset the apnoea dives’ memory of the day at any moment,
by following the procedure described in chapter 3.7.2.

b) View of a subsequent apnoea dive (picture 31-b):

1 value of current depth, in meters (m) or feet (ft);

2 time of last apnoea dive, given in minutes and seconds by

the icon "DIVE T";
3 maximum depth reached during last apnoea dive, given in

meters (m) or feet (ft) by the icon “MAX”;
4 TOTAL number of apnoea dives performed during the day;
5 icon FAEE.

 DANGER: Cressi-sub strongly recommends to avoid

any apnoea diving after snorkel dives. Moreover, at least
two hours should elapse since the end of a snorkel dive
before starting an apnoea dive, which anyway should not
exceed the allowed maximum depth of 16 ft.

Related topics:

• 2.7.3. -

FAEE

(or Apnoea) mode parameters setting

• 2.7.1. - Maximum depth alarm

• 2.7.2. - Date and time adjustment

• 2.7.3. - Units of measurement setting.

• 3.7.1. - Surface interval after an apnoea dive (SURF) /
Apnoea dives memory and history (HIST)

• 3.7.2. - FAEE dive memory and history (HIST) reset

• 4.1.3. - Surface interval after a FAEE dive

• 4.2.3. - FAEE dive Logbook

• 4.3.3. - FAEE dive memory and history

3.7.1. - Surface interval after an apnoea dive
(SURF) / Apnoea dives memory and history

HIST

At a depth lower than 4 ft. and as long as computer
remains underwater (contact “E” on), its display will deliver
following information (picture 35-a):

1 Surface (or recovery) time, given in minutes (1 a) and

seconds (1 b);

2 Time of

last

apnoea dive, given in minutes and seconds

by the icon “DIVE T.”;

3 Maximum depth reached during

last

apnoea dive, given

in meters (m) or feet (ft) by the icon “MAX”.

4 TOTAL number of apnoea dives performed during the day;

5 Value of current depth, in meters (m) or feet (ft).

ENGLISH

the display will get back to the main view shown in picture 37.

Related topics:

• 2.7.3. - Units of measurement setting

• 3.7. - FAEE (or Apnoea) program

• 3.7.2. - Apnoea dives memory and history (HIST) reset

• 4.3.3. - FAEE dives memory and history

3.7.2. - Apnoea dives memory and history (

HIST

) reset

Apnoea dives memory and history of the day will be reset
automatically at midnight. Though, it is possible to reset the
apnoea dives memory and history, by getting to mode and
depressing button A ( ) repeatedly, until the related
view will appear (picture 36). Now, keep button C
( ) depressed during 5-6 seconds: the display will
be flashing and replacing the icon with “CLEA” (picture 38),
until the data stored in the apnoea dives memory will be enti­rely cancelled (picture 39).

Since the high frequency of data updating in computer’ s
FAEE mode (every second), the resetting function is particularly

important, in order not to fill the available memory too soon.

NOTE: it is possible to carry out the above procedure only
for the

HIST

function of computer’ s

faee

mode.

NOTE: the apnoea dives memory reset does not affect at
all the data to be downloaded through the PC interface.

Related topics:

• 3.7.1. - Surface interval after an apnoea dive (SURF) /
Apnoea dives memory and history HIST

• 4.3.3. - FAEE dive memory and history

• 4.5. - Data PC transfer: compatible PC interface

ENGLISH

3 Surface time, given in hours and minutes, meaning the

current surface interval, shown by the ( ) icon.

4 graph of the residual nitrogen in the tissues after a dive.

NOTE: should a dive begin within less than 10 minutes of
surface interval, will consider this new dive as the
continuation of the previous one: the dives’ count and dive
time computation will restart from where they had stopped.

NOTE: on the contrary, dives carried out after at least 10
minutes of surface interval will be considered as new dives.

By depressing button A ( )four times in a row, you get
to the dive planning program, shown by the (PLAN) icon (pictu-

re 7c), already seen in chapter 2.4.2.: this time, it will take into
account the residual nitrogen contained in the tissues after
the previous dives, and will vary the no decompression time,
making it shorter than those given for the first dive.

NOTE: the PLAN function does not work in GAGE (depth
gauge/timer) computing program and in the FAEE program

At the end of de-saturation, the side bar showing the residual
nitrogen will be empty, meaning the full releasing of residual
nitrogen, that may affect following dives.

Related topics:

• 2.4.2. - Dive planning.

• 3.1. - Air dive (DIVE ).

• 3.2. - Hyper-oxygenated Nitrox mixture dive

4.1.2. - Surface interval after a

GAGE

program

In a GAGE, program dive, ascending to a depth lower than 4 ft.,

computer won’t give any data related to de-saturation

and won’t be able to make any saturation and de-saturation

2 Time of

last

apnoea dive, given in minutes and seconds

by the icon “DIVE T.”;

3 Maximum depth reached during last apnoea dive, given in

meters (m) or feet (ft) by the icon “MAX”.

By depressing button D ( ), you get directly to the view
of apnoea dives memory and history (HIST), which delivers fol-

lowing information (picture 36):

1 TOTAL number of apnoea dives performed during the day;
2 Maximum depth reached during the apnoea dives of the

day, given in meters or feet;

3 Time of the longest apnoea dive of the day , given in minu-

tes and seconds by the icon “MAX DIVE T”.

By depressing button D ( ) once more, you get back to
the main view (picture 37), which shows the current time; by
depressing button D ( ) once more, you get back to the
view of the surface values as shown in picture 35.

In case the computer is plunged again underwater, and the
contact “E” switches on, same values will remain on the dis­play, which will change as shown in picture 35-a.

After ten minutes of surface time elapsing since last apnoea
dive, the display will change as follows: if the computer is
underwater, the contact “E” is on, and the display will change
as shown in picture 31-b; if the computer is taken out of water,
the display will get back to the main view shown in picture 37.

Related topics:

• 2.7.3. - Units of measurement setting

• 3.7. - FAEE (or Apnoea) program

• 3.7.2. - Apnoea dives memory and history (HIST) reset

• 4.3.3. - FAEE dives memory and history

ENGLISH

5 Graph of the residual nitrogen at the end of the dive: if it

remains in the "green" zone, the dive is classified a no

decompression dive; if it enters the "red" zone, the dive is

considered a decompression dive.
6 Indicator of altitude level at which the dive has been con-

ducted (see chapter 2.2.).
7 The ( ) icon appears when the dive has been conduc-

ted with EANx mixture (Nitrox).
8 Graph of CNS O2 toxicity (see chapter 3.3.3.).

All three display modes show as well all icons related to the
alarms which may have started during the dive, like:

(PO2) (PO2 alarm); (SLOW) (maximum ascent rate alarm), and so on
To view the second logbook display mode, just depress button

D ( ). The mode’s number 1/3 is replaced by 2/3, mea­ning the second of the available logbook modes related to
the dive.

This second mode supplies the following data (picture 41):

1 Dive’s starting time (the time at which the computer has

gone below 4 ft., starting the dive time computation.

2 Dive’s end time (the time at which the computer has gone

above 4 ft.;
3 Dive’s average depth (AVE) in m or ft.
4 Dive’s total time, given in minutes, shown by the "DIVE T."

icon

To revert back to the first display mode, just depress button
C ( ), To view the third logbook display mode, just
depress button D ( ). The mode’s number 2/3 is repla­ced by 3/3, meaning the third and last of the available log­book modes related to the dive.

gram: the data are entered every 30 seconds in the logbook
(dive journal). To activate the logbook, while on surface,
depress button A ( ), in sequence, until the (LOG) icon
appears on the display (picture 43).

NOTE: Any dive lasting less than 30 seconds (data ente­ring frequency) will not be stored.

‘s logbook is a multifunction instrument that allows to
view, on three different display modes, a full series of data rela­ted to dives, starting with the most recent one in chronologi­cal order.

The main display mode (picture 43) shows the (LOG) function,
which supplies the following information:

1

GAGE icon

2 Dive’s year
3 Dive’s date (month and day) – in brackets the dive’s num-

ber in the daily series

NOTE: the first dive of the daily series is noted in brackets
with 1 (meaning dive 1), the second with 2 (dive 2), and so on.

4 Maximum depth reached during the dive, given in m or ft.
5 Dive’s number: the most recent dive’s information is given

first. When more than 60 dives are conducted, the oldest

dives are cancelled out.

6 Indicator of altitude level at which the dive has been con-

ducted (see chapter 2.2.);

7 SLOW icon meaning the maximum ascent rate has started

To view the second logbook display mode, just depress but­ton D ( ). The mode’s number 1/3 is replaced by 2/3,
meaning the second of the available logbook modes related
to the dive.

ENGLISH

• 2.7.3. - Units of measure setting

• 3.6. - GAGE (or depth gauge/Timer) program

• 4.1.2. - Surface interval after a GAGE program

4.2.3. -

FAEE

program logbook

Cressi-sub computer stores data related to the last

apnoea dives conducted in FAEE program: the data are ente­red every second. To activate this function, while on surface,

depress button A ( ), in sequence, until the (LOG) icon
appears on the display (picture 46).

NOTE: the storage of dives’ time in function FAEE varies as
to the time of apnoea and, although the data sampling fre­quency is of 1 second, no apnoea dive lasting less than 30
seconds is stored, in order not to fill up the available
memory too soon.

‘s logbook is a multifunction instrument that allows to
view, on three different display modes, a full series of data
related to apnoea dives, starting with the most recent one in
chronological order.

The main display mode (picture 46) shows the (LOG) function,
which is soon replaced by the number of dive and display
mode (1/3 = first of the three available modes related to that
apnoea dive).

It shows the following information:

1

FREE icon

2 Apnoea dive’s year
3 Apnoea dive’s date (month and day) - in brackets the dive’s

number in the daily series

3 Total time of the apnoea dive given in minutes and

seconds, shown by the "DIVE T." icon

To view the display modes related to the previous apnoea
dives, depress button D ( ) again. By keeping the button
depressed, you enter a rapid sequence of the first display
modes related to the previous apnoea dives.

By depressing button C ( ), the display mode will
change, while by keeping it depressed, you will enter a rapid
sequence of the first display modes related to the subseu­quent apnoea dives.

Related topics:

• 2.6. - FAEE (or Apnoea) program parameters setting.

• 2.7.2. - Date and time adjustment

• 2.7.3. - Units of measure setting

• 3.7. - FAEE (or Apnoea) program

• 4.1.3. - Surface interval after a FAEE program

4.3. – Dive historic memory (

HIST

).

4.3.1. –

DIVE

program dive historic memory.

Cressi-sub computer is also equipped with a historic
memory for DIVE program dives (HIST). To start this function,
depress button A ( ) in sequence until the (HIST) icon

appears on the display (picture 49). This program supplies
information related to:

1 total time of DIVE program dives, given in hours;

2 maximum depth reached during the dives (given in m or ft);

3 dives’ total number, shown by the “DIVE” icon

ENGLISH

• 2.7.3. - Units of measure setting.

• 3.6. - gage (or depth gauge/Timer) program

• 4.5. - Data PC transfer: compatible PC interface.

4.3.3. -

FAEE

program apnoea dive historic memory

Cressi-sub computer is also equipped with a historic
memory for FAEE, program apnoea dives (HIST). To start this

function, depress button A ( ) in sequence until the
(HIST) icon appears on the display of the FAEE program (picture

36). This program supplies information related to:

1 TOTALnumber of apnoea dives performed during the day;

2 Maximum depth reached in apnoea dives during the day,

given in meters (m) or feet (ft);

3 Time of the longest apnoea dive performed during the day,

given in minutes and seconds by the icon “MAX DIVE T”

The memory of apnoea dives performed during the day will
be reset automatically at midnight. It is though possible to
reset the apnoea dive historic memory by keeping button C
( ) depressed for about 5-6 seconds: the display
will be flashing and replacing the HIST icon with “CLEA” (pictu­re 38), until all data stored in the apnoea dive historic memory
have been fully cancelled (picture 39).

Since the frequency of computer’s data adjustment in
the FAEE program (every second), the reset function is especially

important, in order not to fill up the available memory too soon.

NOTE: it is possible to carry out the above procedure only
for the HIST function of computer ’s FAEE program.

NOTE: the apnoea dive historic memory reset does not affect
in any way the data transferring through the PC interface.

• 3.1. - air dive (DIVE )

• 3.2. - Hyper-oxygenated Nitrox mixture dive

• 3.6. - GAGE (or depth gauge/timer) program

• 3.7. - FAEE (or Apnoea) program

• 4.2. - Dive logbook

• 4.5. - Data PC transfer: compatible PC interface

4.5. - Data PC transfer: compatibile PC interface (PC).

Cressi-sub computer may be interfaced with a com­patible IBM personal computer having following specifica­tions:

• operating systems: Windows 98

second edition

, Windows
2000, Windows ME, Windows XP (Windows®is a Microsoft
Inc. registered trademark);

• CPU: Pentium II 266 Mhz or superior;

• RAM: at least 64 MB or superior (recommended);

• Video resolution: 800x600 or superior (recommended)
By connecting the hardware of Cressi-sub (accessory) inter-

face to a USB port of your personal computer and installing
the related Cressi PC Logbook (accessory) software, it will be
possible to download all data stored in your computer.
In order to do so, you need first to enter , computer’s
PC function, by depressing button B ( ), in sequence,
until the (PC) icon appears (picture 52).

By following the directions, you can easily download your own
dives’ or apnoea dives’ profile in order to view, print or vary
them by means of the (accessory) interface. It may also be
used for training, by means of a dive simulator contained in
Cressi PC Logbook software of its PC interface (accessory).

ENGLISH

This utility can be reset dive computer like as warm boot.
These setting and calculation data were cleared as follows:

1) Dive mode setting like as Dive, GAGE and Free mode

2) Surface time count and de-saturation time count

3) PGT and OLI value

4) Lock condition
And these setting were not cleared as follows:

1) Current time and calendar

2) Dive setting such as FO2, PO2Max, Depth alarm, Dive
time alarm (free) and USF

3) Unit setting

3. How to use it to dive computer

A.) Installation

- Please install PCLOGBOOK V6.0 before using this utility to
install USB driver for this
PC Interface unit.

- Copy utility to your storage on PC (It is not necessary to
specify folder)
B.) Run utility

Click icon (EDY_RESET.exe).
Below screen will be shown on screen if utility could find PC
Interface unit.

If it success to reset dive computer, below screen will be
shown and dive computer will
be into time set mode after exit PC mode.

Related topics:

• 2.4. - Parameters setting

• 2.5.2. - Date and time adjustment

• 2.7.3 - Units of measure setting

• 4. - Surface interval

• 4.2. - Dive logbook

• 4.3. - Dive historic memory

• 4.4. - Dive profile

5. - CARE AND MAINTENANCE.

Cressi-sub is designed to operate in extreme condi-

tions with extensive underwater use.
You should always remember though that it is a precision

instrument deserving appropriate care. Please avoid any vio­lent shock, protect it from extreme heat sources, always
wash it in fresh water after using, dry it carefully, never store it
wet, avoid any contact with heavy equipment, like diving
cylinders.

WARNING: avoid any contact with solvents or chemicals
of any kind. Never use compressed air to dry the computer.
Do not use the computer in hyperbaric cabins if it is not
completely under water.

WARNING: Do not open the instrument’s cage or try to
open and remove its buttons or its pressure sensor.

NOTE: always wash the instrument in fresh water after
using.

The buttons don not need any particular care: never grease
them with oil or spray of any kind.

ENGLISH

ment, during a corresponding amount of hours. After bat­tery replacement, all settings revert back to the preset

value (DIVE program: FO2=21% and PO2=1.4 bar, depth
alarm on 132 ft., not working).

NOTE: you should remember that different factors affect
the battery average life: time of storage before acquiring,
the dive time, the use of back-illumination, the battery’s
quality itself, the temperature.

WARNING: always check your computer’s water-tight­ness! Any anomaly or ater infiltration due to incorrect battery
replacement will void the warranty.

Related topics:

• 5. - Care and maintenance

• 7. - Warranty.

6. - TECHNICHAL SPECIFICATIONS.

Algorithm: Bühlmann ZH-L12;
Standard tissues: 12
Hemi-saturation time: from 5 to 640 minutes
Dimensions and weight: Diameter: 51 mm (2 in.) -

Height: 12 mm (0,47 in.) - Weight: 75 g (2,6 oz.)

Depth sensor:

- Sea water setting (fresh water depths are about 3% lower)

- Thermic counterbalanced

- Measuring field by DIVE function: 0-325 ft.

- Measuring field by GAGE/FAEE function: 0-656 ft.

- Precision: +/- 1% (T 20° C – 68 °F)

- Reading resolution: 0.33 ft. (from 0 to 327,7 ft.), 3,3 ft. (from
328 to 655,8 ft.)

reach a 50% saturation). Cressi-sub utilizes 12 stan­dard tissues, on which the mathematical model computa­tions are carried out, in any stage of the dive, on surface and
in the subsequent dives.

6.1.1. - No decompression tables by the first dive
in a series.

ENGLISH

Depth (m)

9
12
15
18
21

24
27
30
33
36
39
42
45
48

Depth (ft)

30
40
50
60
70
80
90

100

110
120
130
140
150
160

AIR

200

104

66
47
35
25

19
16
13

11

9
8
7
7

EAN1 (32%)
PO2=1.4bar

200
200

117
74
55

41
32
24

19

--

--

--

--

--

EAN2 (36%)

PO2=1.4bar

200
200

182

92
65
50
38

--

--

--

--

--

--

--