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user manual: re-correct pSCR wording

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Unsure where and why this got changed in the update to 4.7.

In pSCR world, the gas that is currently driving the rebreater is
called a "driving gas". This is not per definition backgas, as any
gas can be plugged in by means of a swichblock.

Further. The gas that is trown away (typically 10%) is released
from the unit at inhale of the diver. Yes, this may sound weird
to the average OC diver, but it is like that. It's by design.

All this wisdom from a GUE trained RB80 diver :-)

Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>
This commit is contained in:
Jan Mulder 2017-10-20 21:40:23 +02:00 committed by Dirk Hohndel
parent eb838b79ca
commit 8dbf46fe8f
1 changed files with 3 additions and 3 deletions
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Documentation/user-manual.txt
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@ -2012,11 +2012,11 @@ image::images/sidemount1.jpg["FIGURE: Sidemount profile",align="center"]
Passive semi-closed rebreathers (pSCR) are a technical advance in diving equipment that
recirculates the breathing gas a diver uses, while removing carbon dioxide from
the exhaled gas. While a small amount (typically a tenth) of the exhaled breathing gas is released into the water,
a small amount of fresh gas is released from the diving gas cylinder.
a small amount of fresh gas is released from the driving gas cylinder.
A diver using a single cylinder of breathing gas can therefore dive for much longer periods than
using a recreational open-circuit configuration. With pSCR equipment, a very small amount of breathing
gas is released every time the diver exhales. With active SCR (aSCR) equipment, in contrast, a small amount of
breathing gas is released continuously from the diving cylinder.
gas is released every time the diver inhales. With active SCR (aSCR) equipment, in contrast, a small amount of
breathing gas is released continuously from the driving cylinder.
To log pSCR dives, no special procedures are required. Use the normal steps outlined above: