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| author |  Jan Mulder <jlmulder@xs4all.nl> | 2017-03-06 10:53:24 +0100 |
|---|---|---|
| committer |  Dirk Hohndel <dirk@hohndel.org> | 2017-03-17 09:36:52 -0700 |
| commit | acb38c9e00f263a60c0bb4b4765e889252990e3d (patch) | |
| tree | e15206fd5563385e8cb28f67f44e7c0ec4acec50 /Documentation/user-manual.txt | |
| parent | 0398af341d3b18dd6135cf299643e3d99a8734e4 (diff) | |
| download | subsurface-acb38c9e00f263a60c0bb4b4765e889252990e3d.tar.gz | |
user manual: pSCR is not driven from back gas by default
Generalize the wording. pSCRs are typically configured with a swichblock,
allowing insertion a any gas in the unit, equivalently with a gas change
on open circuit.
Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>
Diffstat (limited to 'Documentation/user-manual.txt')
| -rw-r--r-- | Documentation/user-manual.txt | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/user-manual.txt b/Documentation/user-manual.txt index 262edd637..c89cd5d61 100644 --- a/Documentation/user-manual.txt +++ b/Documentation/user-manual.txt @@ -1954,11 +1954,11 @@ 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 back 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 inhales. With active SCR (aSCR) equipment, in contrast, a small amount of -breathing gas is released continuously from the back cylinder. +breathing gas is released continuously from the driving cylinder. To log pSCR dives, no special procedures are required. Use the normal steps outlined above: @@ -1970,7 +1970,7 @@ To log pSCR dives, no special procedures are required. Use the normal steps outl If a pSCR _Dive Mode_ has been selected, the dive ceiling for that is adjusted for the oxygen drop across the mouthpiece, which often requires longer decompression periods. Below is a dive profile -of a pSCR dive using EAN36 on the back cylinder and oxygen for decompression. Note that this dive lasted +of a pSCR dive using EAN36 as bottom gas and oxygen for decompression. Note that this dive lasted over two hours. image::images/pSCR_profile.jpg["FIGURE: pSCR profile",align="center"] |