From acb38c9e00f263a60c0bb4b4765e889252990e3d Mon Sep 17 00:00:00 2001 From: Jan Mulder Date: Mon, 6 Mar 2017 10:53:24 +0100 Subject: 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 --- Documentation/user-manual.txt | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'Documentation') 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"] -- cgit v1.2.3-70-g09d2