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© ⅯⅯⅩⅢ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 130115001
39
SuperLite
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27
®
and exhalation effort should be nearly unnoticeable.
Press in on the purge button in the regulator cover.
This should produce a strong burst of breathing gas.
3.8.7 Sealing Integrity Check
If there is any doubt that the helmet is sealing prop
-
erly, perform the following test prior to diving.
Turn the supply gas off at the dive control system
and bleed the umbilical.
To perform this test, the diver must have an assistant
standing by. The assistant should be in control of the
gas supply console in the event the diver needs air or
he must be ready to lend a hand. The diver must be
next to the dive control manifold so that the air may
be turned on instantly, or the diver must be ready to
run a hand between his neck and the sealing neck
dam in order to pull the neck dam away from the
neck to allow breathing.
With the neck dam ring on the diver’s head, the hel
-
met is installed and the locking collar closed. When
the diver attempts to inhale, a suction on the neck
dam is formed, indicating he is achieving a good seal.
The diver must then turn the air on immediately so
that he can breathe. If the diver does not turn the air
on he will not be able to breathe, unless the neck dam
is pulled away from his neck.
To remove the helmet, start by pulling out (forward)
on each sealed pull pin and turning so each remains
in the open position. Tilt your head, and the helmet,
forward and swing the locking collar assembly back
behind your shoulders.
Do not perform this test unless the diver
and his tender are stationed immediately
adjacent to the diver’s air manifold and
you are certain the air is on to the mani-
fold. If the diver is unable to flow air to
the helmet, either through the umbilical or
the bailout, he may not be able to remove
the helmet easily.
To break the seal in this situation, the
diver must put his hand between the neck
dam and the neck, and pull the neck dam
away from the neck. a tender must be
standing by to assist the diver in removing
the helmet if needed. Suffocation could
result.
WARNING
Tilt your head upright again and push the swinging
tongue catch forward with one hand and hold it in this
position. Grasp the pull strap at the back of the helmet
and pull down on it. This will break the seal between
the neck dam/neck ring and the helmet neck ring on
the base of the helmet. Once the seal is broken the
neck ring assembly will come loose from the helmet.
Pull the nose block device knob away from your
face, loosen the chin strap inside the helmet, and lift
the helmet off of your head. A good tender will be
prepared to help the diver with the removal of the
helmet as required.
Reach in and spread the neck dam, pulling against the
sides of the neck dam with the palms of both hands.
Slide the neck dam/neck ring assembly forward so
your chin will clear the chin strap. Lift the neck dam
over your head.