Mares NEMO AIR Guide de l'utilisateur télécharger pdf (Page 9)

these parameters in addition to the normal air

dive parameters (discussed in the preceding

section).

This section will examine the general

parameters for EAN dives monitored by Nemo

Wide and the differences in how the data are

displayed.

 WARNING

It is essential to correctly set the oxygen

percentage in the mix to ensure correct

readouts of:

• no decompression time remaining;

• decompression stop times;

• alarm on exceeding the maximum

permitted PPO

 WARNING

Before the dive, make sure you have

correctly set up all the EAN dive parameters:

percentage of oxygen in the mix and limit

for the partial pressure of oxygen, which

together determine the maximum depth of

the dive.

 WARNING

The use of oxygen rich mixes exposes

the diver to different hazards from those

associated with compressed air. The

diver should be aware of these risks and

understand how to avoid them.

 WARNING

Nemo Wide should only be used for diving

with oxygen rich mixes (EAN) by divers

who have the necessary certiﬁcation. Lack

of appropriate diver training may result in

possibly serious injury.

 WARNING

The user is advised to carefully read the

section on compressed air diving before

reading the section on EAN dives.

MONITORING OF THE GENERAL

DIVE PARAMETERS

OXYGEN PARTIAL PRESSURE

When the diver reaches a depth at which the

PPO

exceeds the maximum limit entered in

the corresponding parameter, (from 1.2 to 1.6

ATM), Nemo Wide triggers an alarm condition

signaled by:

• blinking depth indicator;

• audible alarm.

The alarm persists until the diver ascends

enough for the PPO

to return within the

programmed limit.

 WARNING

When the max PPO

alarm goes off, ascend

immediately until the alarm turns off.

EFFECTS ON CENTRAL NERVOUS SYSTEM

Oxygen toxicity exposure is monitored by means

of a CNS (Central System Calculation), based

on currently accepted recommendations for

exposure limits.

This toxicity is expressed as a percentage

value which ranges from 0% to 100%. The

percentage CNS value is shown on the display.

An alarm is triggered when it exceeds 75%,

signaled by blinking of the value.

PREDIVE  EAN

This operating mode remains active until the

diver goes below 1.2 meters (4 ft).

The following details are displayed (Fig. 22):

• type of dive (EAN);

• units of measurement (m-°C or ft-°F);

• type of water (Salt, Fresh);

• altitude program (if enabled) and level;

• personal correction factor (if enabled) and

level;

• icon for %O

Fig. 22

NOTE

If Predive Mode persists for more than 10

minutes without any button being pressed,

Nemo Wide will revert to Time mode.

NOTE

Before every dive, it is advisable to

enter Set Dive mode and check all

the parameter settings and the EAN

parameters in particular.

 WARNING

We advise that when diving you always put

Nemo Wide into Predive mode.

Always check that the dive computer is

switched on early in your dive.

DIVE  EAN:

“NODECOMPRESSION” DIVE

When the diver descends below 1.2 meters (4

ft) Nemo Wide automatically switches to Dive

Mode and starts displaying the dive data.

If this mode persists for more than 20 seconds,

Nemo Wide will begin recording the dive

details in the Log Book memory.

The following details are displayed (Fig. 23):

• current depth (in “m” or “ft”);

• no decompression time remaining,

expressed in minutes;

• “no deco” icon;

• icons for the altitude program and personal

correction factor (if enabled).

• the % O

;

• the % CNS.

Fig. 23

NOTE

The procedure for scrolling the items on

the display is identical to that described in

the section on diving with compressed air.

NOTE

The functions of the buttons are identical

to those described in the section on diving

with compressed air.

In this mode the buttons function as follows:

<+> button:

• Press this button to display the maximum

depth reached. Press it again to remove the

maximum depth.

• Hold down the button for 2 seconds to

activate the display backlight.

<-> button:

by pressing this button you can choose to view

on the display bar:

• the % O

;

• the % CNS.

• the temperature (in °C or in °F);

• the duration of the dive so far (dive time) in

digits.

<ENTER> button:

• hold down this button to display the dive

settings with the same window as the Predive

mode.

<ESC> button:

• When the <ESC> button is pressed during

the dive, Nemo Wide will temporarily display

the estimated deep stop required. The data

displayed during the ascent may vary as a

result of the diver’s behavior. Divers should

check this data during the ascent for more

precise information on the estimated stop.

DIVE 

EAN “DECOMPRESSION STOP” DIVE

The data displayed for decompression-stop

diving with EAN are as follows (Fig. 24):

• “deco” icon;

• current depth (in “m” or “ft”);

• depth of deepest decompression stop

(in “m” or “ft”);

• duration of the deepest decompression stop;

• icons for the altitude program and personal

correction factor (if enabled).

1 2 3 4 5 6 7 8 9 10 11 12 13 14

Commentaires sur ces manuels

Pas de commentaire

Mares NEMO AIR Guide de l'utilisateur Page 9

Commentaires sur ces manuels

Produits connexes et manuels pour PC/postes de travail Mares NEMO AIR