On 19.01.2015, at 15:05, Anton Lundin <[email protected]> wrote:

On 19 January, 2015 - Davide DB wrote:

On Mon, Jan 19, 2015 at 1:02 PM, Anton Lundin <[email protected]> wrote:

Hmm... As i read http://www.halcyon.net/RB80 it says
"8:1 ratio provides substantial gas extension"

Is that old info or should i read that in some other way?

Counterlung ratio is 1:10, 8:1 is the real expected ratio in water due
to mask clearing, ascent flush...

http://www.frogkick.nl/files/michael_waldbrenner_rb80_rebreather.pdf (page 10).

This is another article form the RB 2000 inventor Dr. Reinhard Buchaly:

http://www.diritalia.it/images/pdf/quest/buchaly_rb80.pdf

Unfortunately it's in Italian but you can easily translate with google:

La ventilazione di questo rebreather semi chiuso a volume costante ha
una ratio di 1:10 (page 2)
La resa effettiva è di 1:8. Lo scarico del corrugato, profili yo-yo
che frequentemente si trovano nelle grotte e l'espirazione dal naso
non permettono di raggiungere la ratio ideale. (page 3)

I was taught to use factory counterlung ratio.


Awesome! Thanks for clearing that up.



From 7c989caa383b1d51aaa298741ea229a33f568f70 Mon Sep 17 00:00:00 2001
From: "Robert C. Helling" <[email protected]>
Date: Mon, 19 Jan 2015 15:28:56 +0100
Subject: [PATCH] UI for pSCR preferences

Signed-off-by: Robert C. Helling <[email protected]>
---
 qt-ui/preferences.cpp |  9 +++++++--
 qt-ui/preferences.ui  | 42 ++++++++++++++++++++++++++++++++++++++----
 2 files changed, 45 insertions(+), 6 deletions(-)

diff --git a/qt-ui/preferences.cpp b/qt-ui/preferences.cpp
index 334b2a1..6c4e65d 100644
--- a/qt-ui/preferences.cpp
+++ b/qt-ui/preferences.cpp
@@ -125,6 +125,8 @@ void PreferencesDialog::setUiFromPrefs()
        ui.gf_low_at_maxdepth->setChecked(prefs.gf_low_at_maxdepth);
        ui.show_ccr_setpoint->setChecked(prefs.show_ccr_setpoint);
        ui.defaultSetpoint->setValue((double)prefs.defaultsetpoint / 1000.0);
+       ui.psro2rate->setValue(prefs.o2consumption / 1000.0);
+       ui.pscrfactor->setValue(rint(1000.0 / prefs.pscr_ratio));
 
        // units
        if (prefs.unit_system == METRIC)
@@ -299,7 +301,9 @@ void PreferencesDialog::syncSettings()
        s.setValue("default_filename", ui.defaultfilename->text());
        s.setValue("default_cylinder", ui.default_cylinder->currentText());
        s.setValue("use_default_file", ui.btnUseDefaultFile->isChecked());
-       s.setValue("defaultsetpoint", (int) (ui.defaultSetpoint->value() * 
1000.0));
+       s.setValue("defaultsetpoint", rint(ui.defaultSetpoint->value() * 
1000.0));
+       s.setValue("o2consumption", rint(ui.psro2rate->value() *1000.0));
+       s.setValue("pscr_ratio", rint(1000.0 / ui.pscrfactor->value()));
        s.endGroup();
 
        s.beginGroup("Display");
@@ -397,7 +401,6 @@ void PreferencesDialog::loadSettings()
        GET_BOOL("show_sac", show_sac);
        GET_BOOL("display_unused_tanks", display_unused_tanks);
        GET_BOOL("show_average_depth", show_average_depth);
-       GET_INT("default_setpoint", defaultsetpoint);
        s.endGroup();
 
        s.beginGroup("GeneralSettings");
@@ -405,6 +408,8 @@ void PreferencesDialog::loadSettings()
        GET_TXT("default_cylinder", default_cylinder);
        GET_BOOL("use_default_file", use_default_file);
        GET_INT("defaultsetpoint", defaultsetpoint);
+       GET_INT("o2consumption", o2consumption);
+       GET_INT("pscr_ratio", pscr_ratio);
        s.endGroup();
 
        s.beginGroup("Display");
diff --git a/qt-ui/preferences.ui b/qt-ui/preferences.ui
index 2bcc684..77b3a25 100644
--- a/qt-ui/preferences.ui
+++ b/qt-ui/preferences.ui
@@ -151,7 +151,7 @@
         </sizepolicy>
        </property>
        <property name="currentIndex">
-        <number>5</number>
+        <number>2</number>
        </property>
        <widget class="QWidget" name="defaults_page">
         <layout class="QVBoxLayout" name="verticalLayout_3">
@@ -789,14 +789,14 @@
               </property>
              </widget>
             </item>
-            <item row="6" column="0">
+            <item row="7" column="0">
              <widget class="QLabel" name="label_26">
               <property name="text">
                <string>Default CCR set-point</string>
               </property>
              </widget>
             </item>
-            <item row="6" column="1">
+            <item row="7" column="1">
              <widget class="QDoubleSpinBox" name="defaultSetpoint">
               <property name="suffix">
                <string>bar</string>
@@ -819,6 +819,40 @@
               </property>
              </widget>
             </item>
+            <item row="8" column="0">
+             <widget class="QLabel" name="pSCR">
+              <property name="text">
+               <string>pSCR O₂ metabolism rate</string>
+              </property>
+             </widget>
+            </item>
+            <item row="9" column="0">
+             <widget class="QLabel" name="label_28">
+              <property name="text">
+               <string>pSCR ratio</string>
+              </property>
+             </widget>
+            </item>
+            <item row="8" column="1">
+             <widget class="QDoubleSpinBox" name="psro2rate">
+              <property name="suffix">
+               <string>ℓ/min</string>
+              </property>
+              <property name="decimals">
+               <number>3</number>
+              </property>
+             </widget>
+            </item>
+            <item row="9" column="1">
+             <widget class="QSpinBox" name="pscrfactor">
+              <property name="suffix">
+               <string/>
+              </property>
+              <property name="prefix">
+               <string>1:</string>
+              </property>
+             </widget>
+            </item>
            </layout>
           </widget>
          </item>
@@ -1400,10 +1434,10 @@
   </connection>
  </connections>
  <buttongroups>
-  <buttongroup name="buttonGroup"/>
   <buttongroup name="verticalSpeed"/>
   <buttongroup name="buttonGroup_2"/>
   <buttongroup name="buttonGroup_3"/>
+  <buttongroup name="buttonGroup"/>
   <buttongroup name="buttonGroup_4"/>
   <buttongroup name="buttonGroup_5"/>
   <buttongroup name="buttonGroup_6"/>
-- 
1.9.3 (Apple Git-50)

And here are now the UI elements so everybody can set their own favorite values. 

The earlier question if these need to be per dive values is still unanswered.

Best
Robert

-- 
.oOo.oOo.oOo.oOo.oOo.oOo.oOo.oOo.oOo.oOo.oOo.oOo.oOo.oOo.oOo.oOo.oOo.oOo.oOo.oO
Robert C. Helling     Elite Master Course Theoretical and Mathematical Physics
                      Scientific Coordinator
                      Ludwig Maximilians Universitaet Muenchen, Dept. Physik
                      Phone: +49 89 2180-4523  Theresienstr. 39, rm. B339
                      http://www.atdotde.de

Enhance your privacy, use cryptography! My PGP keys have fingerprints
A9D1 A01D 13A5 31FA 6515  BB44 0820 367C 36BC 0C1D    and
DCED 37B6 251C 7861 270D  5613 95C7 9D32 9A8D 9B8F





Attachment: signature.asc
Description: Message signed with OpenPGP using GPGMail

_______________________________________________
subsurface mailing list
[email protected]
http://lists.subsurface-divelog.org/cgi-bin/mailman/listinfo/subsurface

Reply via email to