POSEIDON ATMOSPHERE User manual

ATMOSPHERE
USER MANUAL 1.0
TM

ATMOSPHERE USER MANUAL
1
Table of Contents
Table of Contents ...............................................................................................1
Conventions Used in this Guide ........................................................................3
Your own Atmosphere........................................................................................5
Certication Information.....................................................................................6
Premise ...............................................................................................................7
Important information.........................................................................................8
Product characteristics ......................................................................................9
Usage
Preparation For Use................................................................................................. 11
Donning The Mask ..............................................................................................12
Diving .................................................................................................................13
Maintenance and Storage................................................................................14
Replacing..........................................................................................................15
Accessories ......................................................................................................16
Service ..............................................................................................................17
Technical Specications...................................................................................18
Atmosphere Troubleshooting...........................................................................19

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ATMOSPHERE USER MANUAL
Conventions Used in this Guide
3
This User’s Guide is NOT intended for use as a training manual, or in any way as a
substitute for proper training through a legitimate training agency approved by Poseidon AB. It
is only intended to provide basic information concerning the Atmosphere Full Face Mask (FFM).
Throughout this Guide, special alert boxes have been inserted to draw attention to
critical information. Three levels of alerts are used in conjunction with color-coded
trisymbols, as follows:
DANGER:
Alert boxes that are RED contain extremely critical information
related to the safety and well-being of the diver. Failure to comply
with information contained in these boxes could lead to serious
injury or death.
WARNING:
Alert boxes that are YELLOW contain vital information that may
impact a diver’s safety and/or proper function of the Poseidon
Atmosphere. Though generally not life-threatening, information
contained in these boxes should not be ignored.
IMPORTANT:
Alert boxes that are BLUE contain important information about the
proper care and maintenance of the Poseidon Atmosphere, and
that may increase diver comfort or enhance enjoyment during dives.

ATMOSPHERE USER MANUAL
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No part of this book may be reproduced or transmitted in any form or by any
means, electronic or mechanical, including photocopying, recording or by any
information storage retrieval system, without permission in writing from an
authorized representative of Poseidon Diving Systems AB.
Text, photographs and gures copyright © 2019
by Poseidon Diving Systems AB
ALL RIGHTS RESERVED
Manual Version 1.0 - February 2019
DANGER:
Do not attempt to use the Poseidon Atmosphere without proper
training, or without a thorough working knowledge of the material
contained in this manual. Careless can cause serious injury or
death. It is the user’s responsibility to attentively monitor the
Poseidon Atmosphere and to have a working knowledge of the
procedures if a problem should arise.

ATMOSPHERE USER MANUAL
Your own Atmosphere
Welcome, to the world of Poseidon divers. Here at POSEIDON we are very
pleased that you have chosen one of the world’s foremost diving regulators.
POSEIDON has been developing regulators for divers since 1958. Professional
divers, military divers, and techdivers choose POSEIDON equipment because of
the high demands they place on our products - the same demands you have!
Your new regulator has been designed to provide you with a life time of pleasure as a
POSEIDON diver. Our objective is that the equipment you use should not be noticeable,
instead it should be at one with the experience and give you total freedom to achieve
what every diver dreams about, the ultimate dive. To be at one with the water. To have
full control and at the same time feel the weightlessness when, meter by meter you
descent into a world of your own.
Nothing shall disturb your concentration. No wheels or knobs that need adjusting. No
regulators that resist your breathing when you have reached your target depth. No
suits that limit your freedom of movement or get damaged at the slightest encounter.
This vision has accompanied Poseidon since the legendary diving enthusiast and
engineer, Ingvar Elfström started the company in the late 50’s. The same ideas motivate
us now.
The name Poseidon represents constant development and improvement of diving
equipment where everything is positioned correctly and everything functions, even in
the most extreme situations.
Products developed in cold Scandinavian waters that are among the toughest you can
dive in. If they work here, they will work anywhere. Poseidon’s devoted followers are
convincing proof of that. Thank you for your condence.
Yours faithfully
5

ATMOSPHERE USER MANUAL
Certication Information
The POSEIDON Atmosphere Full Face Mask is approved according to the EU
Directive for Personal Protective Equipment, 89/686/EEC and meets or exceeds
the requirements of EN 250:2014 for cold water diving.
Type approval certicate is issued by:
SGS United Kingdom Ltd,
Ellesmere Port,
CH65 3EN, UK.
Notied body number 0120.
Poseidon Diving Systems AB is certied according to ISO 9001
Production quality assessment according to article 11 B
of 89/ 686/EEC, assessed by:
SGS United Kingdom Ltd.,
Ellesmere Port,
CH65 3EN, UK.
Notied body number 0120.
Independent performance testing according to directive and standards,
conducted at accredited laboratory ANSTI Test Systems Ltd.
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ATMOSPHERE USER MANUAL
Premise
The POSEIDON Atmosphere Full Face Mask conforms to European Harmonized
Standard EN-250 and is certied for underwater use of a maximum depth of 50
meters.
It is required that the POSEIDON Atmosphere Full Face Mask only be used by
fully trained, certied Full Face Mask divers.
7
WARNING:
Never substitute, modify, add or omit parts.
Use only replacement parts in the conguration as specied and supplied by the
manufacturer. Alteration of this mask will void all approvals and the warranty and
may contribute to a reduction in protection for the user.

ATMOSPHERE USER MANUAL
Important information
8
- Read this manual prior to using the Atmosphere Full Face mask.
WARNING:
Improper use, or misuse of this full face mask or any diving
equipment, could result in serious injury or death.
WARNING:
Do not use this mask until you have carefully and completely read,
understood and followed all instructions and safety precautions
found in this manual, all inserts that accompanied this manual as
well as all tags and markings found on the mask.
WARNING:
Diving is a strenuous physical activity. Its difculty may be
increased by conditions such as cold water, poor visibility,
hard work and increased depth. Always try to exercise prudent
judgement when determining weather or not to dive.
Never dive when tired or in poor health.
- Retain this manual for reference.
- Review this manual periodically and prior to diving.
Only the Jetstream PP second stage regulator may be tted and used with this
mask. The Poseidon Atmosphere Full Face Mask is to be used only in combination
with Poseidon Xstream rst stages.

ATMOSPHERE USER MANUAL
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Product characteristics
The face seal (1) is of ”cushion-type”, with a convex reex surface for excellent
comfort and seal; a technology originally developed for RAF ghter pilots.
Visor clamps (2) are curved to give a sufcient squeeze over the entire visor
ensuring leak tight t.
Inhaled gas is directed to ush the visor (3) for effective demisting.
The mask has a large panoramic visor (3) giving an extremely wide eld of view
optically corrected for distortion free vision. All curved surfaces and sides (4) of
the visor are frosted to avoid distortion and reection.
The visor is covered with a white protection lm used to protect the optical
surface when the mask is not in use.
Head harness buckles (5) are made of sturdy plastics and installed into the mask
withstand a pull load of >300 N.
The inner part (g. 1) of the mask is equipped with a simple internal device to
close the nasal passages for underwater equalization. Refer to the Usage and
Diving chapters of this manual for correct usage of this device.
Fig. 1

ATMOSPHERE USER MANUAL
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Fig. 2

ATMOSPHERE USER MANUAL
11
Usage
Atmosphere is only approved for use with breathing gas according to EN 12021
(air). If a drysuit or wetsuit hood is used at the same time as the mask, it must
have a face seal with an outer surface similar to rubber to ensure a good seal.
An outer layer of Nylon fabric, for example, will not seal the mask effectively.
WARNING:
Do not fold the hood over the mask seal as breathing gas can ll
the hood creating buoyancy difculties.
The contoured piece for equalization located inside the inner mask should be
adjusted prior to rst time use of the mask. The piece can easily be removed and
reattached in three different positions to suit the needs of the user. Correct
position is achieved when the nasal passages are blocked while upward pressure
is applied to the lower part of the mask. Remove excessive material from the piece
with a knife if a lower position is needed and place the piece back to its place.
PREPARATION FOR USE
1. Carefully inspect the mask for any
signs of deterioration or damage.
2. Check that the visor is clean and free
from scratches or blemishes likely to
cause distortion or other difculties
with vision.
3. Fully extend all the head harness
straps.
4. First check that the dive mode switch
on the second stage is in pre-dive
mode (-) and then open the cylinder
valve.
Fig. 3

ATMOSPHERE USER MANUAL
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DONNING THE MASK
1. Place the neck strap around the neck
if required. If the neck strap is not
going to be used it should be removed
from the mask and not left dangling
during use.
2. Invert the head harness over the visor
of the mask (g 4) leaving the face
seal area clear, place the chin rmly
into the chin cup at the bottom of the
mask and pivot the mask up to the
forehead.
3. Pull the harness over the back of the
head while grasping the lower edge of
the center of the harness (g 5).
4. Hold the front tting of the mask in
one hand so as to keep the chin in
correct position, tighten the lower
straps of the head harness one at a
time and then the top strap.
5. Next, tighten the two center straps
and nally check the two lower straps
for tightness and adjust if necessary.
6. The straps should be tightened rmly
so as to hold the mask securely onto
the face. In addition to causing
discomfort, over tightening the straps
can distort the shape of the mask and
reduce the ability to seal to the face.
7. Switch the dive mode switch to dive
position, (+) (g 2, #6).
Fig. 4
Fig. 5

ATMOSPHERE USER MANUAL
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DIVING
The Atmosphere Full Face Mask can easily
be drained in case of water inltration. To
drain the mask, simply push the purge (g
2, #8) button on the regulator while keeping
your head in face-down position.
If inhalation resistance feels unusually
high make sure the dive mode switch is in
dive position, (+).
For underwater equalization, simply press
the lower part of the mask upward,
towards the chin. The contoured silicone
piece will then be pressed towards the
nose, blocking the nasal passages for
equalization.
When out of water, switch the regulator to
pre-dive mode, (-). Release the head
harness straps by pushing forward on all
the head harness buckles with the thumb
until the head harness is extended. Pull
the mask up and over the head.

ATMOSPHERE USER MANUAL
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After dive, rinse the mask and regulator in fresh water, keep the regulator
pressurized during this operation. Do not use cleaning chemicals of any kind to
clean the regulator. Neither may silicone or any other lubricant be poured or
sprayed into the Full Face Mask.
Using the purge button of the regulator, blow out water from the regulator and
mask. Shake the mask to remove excess water and hang up using the neck
strap or head harness to dry at normal room temperature. The mask should not
be left to dry in direct sunlight. Keep the mask stored in the packaging provided
in a dark, cool, dry place at a temperature preferably between 10°C (50°F) and
29°C (85°F). Do not store the mask in direct sunlight or in places colder than
-30°C (-22°F) or warmer than +70°C (158°F). During long-term storage, the dive
mode switch should always be set to the + position.
Maintenance and Storage

ATMOSPHERE USER MANUAL
15
THE VISOR
If the visor is scratched or contaminated so as to impair the vision then it should be
replaced. Unscrew and remove the two visor clamp (1) screws using a small Phillips
head screwdriver. Remove the two halves of the visor clamp from the outer facemask
and take out the visor (2) from its groove (3). Clean the visor groove in the mask
making sure that no loose debris is left in the groove. Even the tiniest particle or hair
may cause an unacceptable leak.
Insert the new replacement visor (2) into the rubber groove (3) on the outer facemask,
ensuring that it is positioned centrally by using the alignment marks at the top and
bottom of the visor to coincide with those on the underside of the rubber groove on
the outer facemask. Replace the upper and lower halves of the visor clamp (1),
ensuring that they slide smoothly over the rubber outer face mask and also align
centrally with the marks on the underside of the rubber groove on the outer facemask.
Replace the two screws and tighten each side one to two turnsalternately until the
two visor clamps touch and then tighten to secure the visor. Do not over tighten the
screws.
Replacing
HEAD HARNESS
The head harness should be replaced if
it shows any sign of aging or
deterioration. Each strap of the head
harness is easily removed from the
mask by prying the rectangular buckle
loop from its groove in the buckle. Fit a
new rectangular loop to each strap of
the new harness and ret by snapping
the loops into each buckle. It should be
noticed that the loops have one side
thinner than the other. It is the thin side
which snaps into the buckle. When
retted correctly the molded date
indicator on the center of the harness is
positioned towards the bottom of the
mask and facing outward away from the
mask.

ATMOSPHERE USER MANUAL
Accessories
16
No other parts, except the accessories listed below, are allowed to be integrated
with the POSEIDON Atmosphere Full Face Mask.
WARNING:
Any modication to the mask in order to attach such parts can
damage the equipment or cause serious injuries.
COMMUNICATION
The mask is designed to permit integration and compatibility with all standard
existing underwater communication systems. Contact your nearest POSEIDON
dealer for purchase recommendations.
For correct use of the underwater communication system refer to its user manual.
WEIGHTS
The mask can be tted with external buoyancy compensating weights which also
can be used for mounting torches, video cameras etc.
The weights are designed for a standard lamp/camera tting system with a M8
threaded screw. Do not use any lamp/camera which is not suited for underwater
head-mounting application.

ATMOSPHERE USER MANUAL
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Service
The POSEIDON Atmosphere Full Face Mask should be serviced bi-annually /
once every 100 dive as a minimum. It’s recomemnded that it’s serviced more
frequently, if the mask is used more often.
IMPORTANT:
Service should only be done by a certied Poseidon service
technician and original Poseidon parts and service kits should
only be used.

ATMOSPHERE USER MANUAL
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Technical Specications
General
Approvals EN 250:2014 Cold Water
EN 136:1998 (Mask excl. Demand Valve)
NIOSH 84.205 Fit test (Mask
excl. Demand Valve)
Min water temp Unlimited
Gas According to EN 12021 (air)
Demist system Flow-through, lm
Inhalation resistance at 50 msw (166 fsw, EN 250) 0,05 J/l
Total work of breathing at 50 msw (166 fsw, EN 250) 1,54 J/l
Face Piece
Mask material Black silicone
Visor material Polycarbonate
Neck Strap material Black silicone
Compatible 1st stage regulator
All POSEIDON Xstream 1st stages
2nd stage regulator
POSEIDON Jetstream PP
Flow rate 1800/63 l/cuft per min
Safety valve opening pressure 18 +/- 1 bar (261 +/- 14 psi)
Technique Upstream servo valve
Hose
Material Reinforced SBR/NR/CR
Burst pressure >100 bar (1450 psi)
Pull strength >1000 Newton (225 lbft)
Safety inspection holes Both ends
Wear protecting crimps Both ends