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Chapter 2
Always check the regulator adjustment for proper
function before you enter the water.
air flow through the mask if the intermediate
pressure on your first stage regulator is set at
around 135-145 psi. Higher first stage regulator
pressures may cause free flow, but turning the
regulator adjustment knob in should stop the
flow. In the unlikely event there is still flow,
proceed to the regulator adjustment section in
Chapter 5 to reset the regulator.
Loosen all the straps on the Spider and hold the
mask on your face. Take a couple of good
breaths, breathing slow and soft at first then hard
and fast. The regulator should be operating with
the minimal amount of breathing resistance and
no free flowing. Any type of an air flow "hiss"
should be able to be adjusted out by using the
adjustment knob. If the adjustment knob is ad-
justed all the way in and the regulator still hisses,
see the regulator adjustment section, chapter 5.
Pressing the purge button should cause a fairly
strong air flow into the mask. If there is no flow
when pressing the purge button, or if breathing
is difficult, see the regulator adjustment section
in chapter 5.
Document # 001026001
EXO Full Face Mask Manual
Once you enter the water, the regulator can be
adjusted for a variety of diving conditions and
positions just by turning the adjustment knob in
or out.
2.8 WIRELESS COMMUNICATIONS
There are several manufacturers that produce a
wireless communications unit that can be used
with the EXO Mask. If you are using wireless
communications read and follow all manufac-
turers instructions for your particular unit.
If you are using wireless communications you
should test the communications by placing the
transducers from both send and receive units in
a bucket of water and speaking into the mask.
Communications should always be tested prior
to the diver entering the water.
WARNING: The waterproof case
for your wireless communications unit
should only be attached to your scuba
backpack, NEVER to your weight belt. In
the event your belt must be dropped the
belt must have a clear drop path and
must not be connected to any other piece
of gear. If this procedure is not followed
the weight belt and wireless electronics
case will be attached to the mask by the
connecting wire.
2.9 USING THE EXO IN THE SURFACE
SUPPLIED MODE
If you have not been trained in the proper use of
surface supplied diving equipment we strongly
recommend that you complete a training course
in the use of this equipment prior to diving sur-
face supplied.
Read and understand the Checking Regulator
Function and Preparing The EXO for use in
scuba mode section of this chapter. The basic
connecting instructions of the mask and regula-
tor function tests are the same.
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