User manual

Poseidon MKVI User Manual
Chapter 4
Page 67
Figure 4-6.
Insert the new oxygen sensor into the
electronics module, with the at edge
of the sensor base facing upwards.
With the electrical connector properly attached to the sensor, inspect the two radial o-rings on
the oxygen sensor base to make sure they are clean and free of any damage. Ensuring that the
electrical connector is still rmly attached, slide the sensor into the electronics module, with the
at part of the outer edge of the sensor base facing towards the top of the electronics module
(Figure 4-6). Carefully press the sensor into the electronics module until it is rmly seated.
There should not be much resistance when inserting the sensor base into the electronics
module. If excessive resistance is evident, inspect the o-rings to make sure they are seating
properly, and make sure the electrical wires are not pinched between the sensor and the sur-
rounding walls.
Traveling with the Poseidon MKVI
Many people conduct most of their diving activities at destinations far from home. As such, it’s
entirely likely that Poseidon MKVI owners will want to travel with their rebreathers to far-off
destinations. Indeed, a great deal of effort went into the design and development of the MKVI
to ensure that it was lightweight and easy to travel with.
Preparing the cylinders
There are strict laws concerning the transport of pressurized gas cylinders on aircraft, and different
airlines will have different policies to assure compliance with these laws. At a minimum, most
airlines require that cylinder valves be removed, and that the cylinders themselves be available
for inspection prior to loading onto an aircraft. Before removing the valves from the cylinders,
it is necessary to completely drain the cylinders of any gas pressure. If the cylinders are full, or
the valves opened such that the cylinders drain quickly, the metal of the cylinders and valves
will become cold, and produce beads of moisture (condensation). It’s important that this
moisture not be allowed to get inside the cylinder, so always allow the cylinders to warm back
up to room temperature, and wipe off any remaining moisture before attempting to remove the
valves from the cylinders.
Removing valves from cylinders can sometimes be tricky. DO NOT attempt to use tools such
as hammers, mallets, wrenches, pliers, or other such devices to remove the valves, unless you
know exactly what you are doing. It is highly recommended that the cylinders be taken to a
qualied dive shop or service center to have the valves removed. The same is true when
replacing the cylinders at the dive destination, or upon returning from a trip. As soon as the
valves are removed, be sure to insert an appropriate plastic plug into the threaded opening of
the cylinder, to prevent dirt, moisture, and other contaminants from entering the cylinders.
IMPORTANT:
Oxygen sensors are regarded as a consumable and NOT covered
by Poseidon’s warranty program!
DANGER:
The oxygen sensors are the most important components of any
rebreather. Handle them with care, and make sure the electrical
connections are clean and properly attached.
DANGER:
The cylinders have been specially cleaned for use with high-
pressure oxygen. Allowing contaminants to enter the cylinders
risks re and explosion, and could lead to serious injury or death.
Flat edge of the sensor base faces
towards the top of the electronics
module