POSEIDON Xstream Deco, Руководство пользователя

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XSTREAM USER MANUAL
Breathing Performance
The diagram above show a calculated
graph for Work of Breathing in Joules/litre
at Qaverage=62.5 litres/min.The equation
behind it, is extracted from hundreds of
tests, from which coefficients for gas
dependency, average flow dependency,
and depth dependency is calculated.
Its maximum inaccuracy is /-
10%. The equation assumes the most
dense gas possible to safely breath is
used, i.e. a maximum tolerable pO2, pN2
at any depth. Adding more Helium will
lower the figures. It is important to
understand that this equation does not
apply to any other regulator, since the
coefficients and characteristics are
strongly dependent on the regulator
construction.
Full regulator capacity is obtained as long
as the cylinder pressure is twice the
absolute interstage pressure, given the
cylinder valve pressure drop is within EN
250 limits. Taking into account the normal
variations in interstage pressure and
adding a safety margin, the required
minimum cylinder pressure during diving is:
50 bar cylinder pressure from 0 msw to
100 msw.
70 bar cylinder pressure from 101 msw to
200 msw
It is a good practise to always plan your
dive according to the “1/3-rule”, planning
to use 2/3 of the cylinder capacity.
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