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  • Hydrogom MCCR Valve
    Hydrogom is a factory in the Netherlands that makes the best MCCR valves in the world The Stainless steel high tech valves are made top precision machinery We have 4 models available specially made for your needs Hydrogom valves are made to provide oxygen to your breathing loop When attached to a first stage regulator with the right fixed pressure the valve gives you a constant flow of oxygen that can be adjusted to your metabolic need The orifice inside the valve is a high precision laser cut micro orifice that insures a constant flow The use of MCCR valves asks for a knowledge of closed circuit systems and a specialised rebreather training We have 4 models 00 01 02 03 available At the end we explain what models we have The upgraded Hydrogom valve the valve during normal operation A constant flow of oxygen is added to the loop The valve during hand operated action a large oxygen flow is added to the loop tools needed for dismanteling OK let us check out the different models Hydrogom CMF Valve Basic version 00 no hoses no fittings Standard with 7 0 000 lohms orifice 5 tolerance CMF Valveset 00 information

    Original URL path: http://www.therebreathersite.nl/09_Webshop/Hydrogom/Startpage.htm (2016-05-02)
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  • met een gesloten rebreather CCR kent een aantal verschillen t o v duiken met open systemen maar ook een aantal overeenkomsten AAN DE OPPERVLAKTE Ongeacht de aard van het probleem terug aan de oppervlakte dient een CCR duiker exact gelijk behandeld te worden als een open circuit duiker Dit heeft betrekking op alle decompressieverschijnselen ademhalingsproblemen en elke andere duikaandoening Gebruik van een gesloten rebreather sluit een behandeling in een decompressietank niet uit ONDER WATER De CCR duiker zal sommige dingen iets anders doen dan een open systeem duiker Zaken die je zult merken en die heel gewoon zijn zijn onder andere Uittrimmen de CCR duiker zal eerder om objecten heen zwemmen dan eroverheen Apparatuur controle de CCR duiker kijkt pakweg om de 30 seconden op zijn meet en regelapparatuur dat is van essentieel belang om de goede werking van zijn apparatuur te controleren Bellen die zullen er meestal niet zijn behalve bij het leegblazen van de duikbril tijdens het verminderen van de duikdiepte en altijd tijdens de opstijgingen om de trimsituatie aan te passen Druk bezig tijdens de afdalingen en de opstijging is een CCR duiker druk bezig en heeft veel te doen eenmaal op diepte valt alleen de regelmatige controle van de meet en regelapparatuur op CONTROLES VOOR DE DUIK Voor de CCR duiker gelden dezelfde buddycontroles als voor de open systeemduiker maar zijn verbruik is maar ongeveer 1 liter gas per minuut uit de zuurstofcilinder en bijna niets uit de cilinder met verdunnend gas lucht Die cilinder wordt hoofdzakelijk gebruikt voor het trimmen trimjack en eventueel ook het droogpak en voor de noodopstijging op open systeem bail out De enige extra te noteren informatie is de hoeveelheid zuurstof en verdunnend gas de gebruikstijd van de scrubber en het ingestelde setpoint PRAKTISCHE ZAKEN DIE DE OC DUIKER MOET WETEN

    Original URL path: http://www.therebreathersite.nl/13_Inspiration/oc_samen_met_ccr_duiken.htm (2016-05-02)
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  • For Sale Adverts
    ADVERTISEMENTS RULES 1 Pictures has to been sent to me in jpg format minimum 900 pixels wide size can be changed by me 2 Only technical diving gear or related items are going to be advertised 3 Text price and e mail address for the buyer to contact you has to be sent to me 4 Only one item or unit per advertisement can be advertised 5 The advertiser has to take charge of all correspondence unless other arrangements are agreed 6 Buyers questions will NOT be answered by me you have to email the advertiser direct 7 I will always keep the right to reject any message 8 I have no responsibility about the sale contact money and don t want to be involved 10 Adverts will last maximum 12 weeks 11 Procedure sent me an email with the text and photo s Text in Word or plain text please The only payment method is by bank or paypal Paypal charges 6 euro for international payments so the fee will be added with 6 euro No credit cards I am sorry you can however pay with creditcard through paypal When the money has arrived your advertisement will be placed

    Original URL path: http://www.therebreathersite.nl/09_Webshop/for_sale.htm (2016-05-02)
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  • Cameleon rebreather
    with integrated stand and lifting handle primarily aimed at classic Inspiration owners who can use all the other parts like lungs wings harness etc but allowing them to place there own electronics ie shearwater hammerhead etc setting the system up to suit them the electronic pod holds up to 5 cells solenoids 2 or more can be placed here taking into account future upgrades of controllers there are 2 oxygen feeds allowing the user to set up with full electronic control or a CMF system or both side by side which seems to becoming more popular there are 3 ports to connect computer hud and a backup display The scrubber is still undergoing design changes in the prototype it is a radial holding over 2 6 kg of scrubber material but still undergoing testing to see which design is more efficient On the prototype the back plate tank holders and parts of the base are made from titanium We will be showing this in London but want to point out that this is a prototype and is not on the market We would like to see if there is a place for something new and we think different Michael Hearn

    Original URL path: http://www.therebreathersite.nl/05_Reviews/cameleon.htm (2016-05-02)
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  • CCRB Sentinel rebreather
    has been at the surface between dives and will adjust its pre dive sequence accordingly prompting for more or less checks Oxygen Sensor Calibration and Filter in out Detector The set has oxygen sensor logging alarming when it is time for a change out Voting logic with manual override on levels 2 3 and the ability to calibrate the cells during a filter change when exposed to air Positioned on the CDM there is also a filter in out sensor This triggers when a filter is changed or removed temporarily This sensor alarms if no filter is present and will force an automatic air calibration of the oxygen cells in the background whenever the filter is refitted or oxygen sensors are re connected Exposure to ambient air must be ensured during this procedure and altitude calibration is automatic Calibrating on air is applicable given sensor failure modes and sensor characteristic modelling Battery Systems Primary power is supplied via triple redundant Lithium Ion rechargeable batteries The backup display has its own battery charged with the main system Chargers are available for a range of AC and DC voltage sources mains car etc as well as emergency charge capability via a stand alone plug in charger pack with its own batteries available mid 2008 Canister Duration Monitoring CDM The CDM is under license from the United States Navy who have completed hundreds of research dives to correlate the thermal wave front within a filter and compare it with when a given millibar of CO2 breaks through the filter Further enhancements have been completed by Closed Circuit Research to show filter duration remaining as a bar graph in 5 increments The CDM can work with all three filter mediums by simply selecting the correct filter during the pre dive sequence Backup oxygen metabolism predictor software provides additional fail safes which operate in parallel with the CDM Data logging All sets are configured with full black box data logging capability of all key parameters An optional PC link system is available Maintenance The set logs usage hours and will prompt for factory service It is possible to strip the complete breathing loop down to its component parts without any tools As the hoses and counterlung are quickly removable cleaning routines are simplified Sentinel Features Integration Background What s new in Life Support Systems LSS Just Check And Dive Preliminary Information November 07 All information within this document is the property of Closed Circuit Research and is not be copied or distributed without the written permission of Closed Circuit Research Ltd Go to the Sentinel features background index Contents Overview Sentinel LSS Features and Options Check And Dive Integrated Life Support ILS Pre Dive Checks Full system check with oxygen sensor calibration Full system check without calibration Reduced Pre Dive checks Pre Breathe Auto Calibration Canister Duration Meter Backup Canister Duration Meter Auto turn on Breathing detection turn on rules Sensor polling HUD and Colour Screen Detailed Alarm conditions New User Interface Screens Dive screens Surface dry screen Screen and menu navigation Dive options screen Bailout and gas configuration Setpoint configuration Auto Setpoint Setpoint changes and ascents descents Dynamic reserve Battery type and charging Bailout and Dive abort Maximum operating depth No Stop Calculator Internet reprogramming Mechanical Features Harness BCD Counter lung Cylinders Outer Case Travel Mode Over pressure Valve Bail out Valve BOV Backup PO2 Display Intelligent Backup Display CO2 Filter Systems Overview This document provides information on features of the Sentinel LSS that especially contribute to safety and ease of use In particular it covers the integration of the mechanical and electronics control systems This provides an intelligent but simple to use life support system LSS The Sentinel provides the user with a simple Check and Dive functionality that makes the Sentinel the quickest and safest LSS to prepare for diving It uses intelligent monitoring and design experience to determine the appropriate tests and checks that the diver needs to perform to get the LSS ready for diving Any problems or remedial action are described clearly on the full colour graphics screen The Sentinel ha s a Heads Up Display HUD and a colour primary display back to index Check And Dive Integrated Life Support ILS The Sentinel Life Support System LSS is designed around a breathing loop high pressure gas sources and electronics control system all highly integrated to give an intelligent but simple display of status to the diver while providing life support This gives the user a simple Check and Dive functionality that makes the Sentinel the easiest LSS to prepare for diving while ensuring system integrity and improving safety It uses intelligent monitoring and design experience to determine the appropriate tests and checks that the diver needs to perform to get the LSS ready for use Any problems are described clearly on the Main screen Status and Summary screens All of this combines to make a unique ILS system The integrated system design means that failures or problems with any part of the system are advised to the diver either in pre dive checks and procedures or as data values or graphics There is significant background analysis that produces a warning system sensitive to changes in expected levels but intelligent enough to not confuse and over load the diver with information and situations that may be routine during a dive These electronic alarms combined with varying levels of mechanical user controls ensure ILS is maintained Examples PPO2 changes that may normally cause PPO2 alarms to be triggered are inhibited if they are of the correct characteristic expected during a descent or setpoint change There is a significant amount of mechanical design required to achieve a moisture tolerant breathing loop that reduces distortion of the readings from the PPO2 cells to a minimum The reliability of the PPO2 readings is further improved by employing a voting algorithm for the PPO2 cells that can ignore data from rogue cells The Sentinel design is simple to use but this simplicity does not mean that the system is simple or stupid in terms of data processing or control analysis The Sentinel includes many levels of warning and system analysis Simplified through experience and intelligence to provide a straight forward human interface that does not routinely overload or annoy with status or false warnings It takes considerable system intelligence and experience to ensure the warnings do not overload or falsely advise the user of problems If falsely warned too many times then there is a reduced likelihood of the diver responding correctly to a truly dangerous and potentially life threatening situation Mechanically it is vital that simple mechanical tasks required to set up the LSS are not ambiguous and prone to user error The Heads Up Display HUD is an ergonomic addition for the diver as it give a simplified and quick to follow view of the status of the LSS The HUD as 3 main warning levels Flashing Red warning is activated when a dive should be aborted on open circuit or not started If diving the diver should switch to the bailout gas The HUD vibration alarm will vibrate every ¼ second for 10 seconds then repeat the 10 second alarm every minute S olid Green and Blue LED s warning is activated when a manageable error situation is in place The correct response is to ascend slowly on closed circuit monitoring the Primary display Solid Green means there are no detected problems The Led states are configured for colour blind as well as highly stressed divers The position of the LED s the flashing or solid state provide conditions that can not be confused with one another Also during stressful dive scenarios the position and status is quick to comprehend and therefore intuitively the desired response is performed The white LED indicates decompression status White LED off no decompression White LED flashing slowly decompression required currently deeper than deco ceiling White LED solid at decompression stop White LED flashing fast shallower than decompression ceiling Pre Dive Checks With current technology not all aspects of the safety and working nature of a LSS system can be performed or determined automatically Therefore when turning on the Sentinel there are a series of pre dive checks that must be performed The Sentinel also gives guidance in performing these checks These checks are displayed in sequence on the Sentinel main display unit Some of these checks rely completely on the diver to perform them correctly eg check breathing loop for leaks Other tests can be more positively tested for by the electronics control system and the user needs to confirm that these are OK to dive with eg that the high pressure cylinders are adequately filled These tests are designed to a Check that all functions of the LSS have a high likelihood of operating correctly b Detect assembly errors c Detect breathing loop errors d Advise the user of system measurements that are outside correct operating parameters These include a High Pressure readings too low b High Pressure readings dropping too quickly possible leaks c Battery Levels d PPO2 partial pressure of oxygen in the breathing loop e Calibration of PPO2 cells performed correctly f CO2 absorbent functioning correctly g CO2 Filter inserted correctly e Reduce redundant tests so that users are not inclined to skip tests that have been performed correctly sufficiently recently During the PreDive checks a short press of both buttons will bring up a simple alarms status screen so that the user can determine at a glance the status of the system while doing a check This can be useful to determine why a check is not working correctly Decompression and Fly time are available from the options menu With these aspects in mind there are 3 levels of Pre Dive checks back to index Full system check with oxygen sensor calibration These tests are performed a After a canister change has been detected b Manual chosen by the diver from the Setup screen There is a canister detector in the middle of the filter assembly This detects the white material of the filter device If the detector becomes dirty especially from being covered in CO2 absorbent granule dust then this auto detection may not operate correctly back to index Full system check without calibration These tests are performed 18hours since the last full Pre Dive tests or if the last Pre Dive tests were not completed correctly All the tests are important However due to the nature of LSSs the most important test is the Pre breathe as this helps ensure that there is no breakthrough in the CO2 absorbent filter or seals and that key functions are operating solenoid etc CO2 breakthrough causes a toxic gas in the breathing loop to gradually build up This build up may not be detectable by the diver who will eventually just pass out from breathing an elevated CO2 level Leak tests of the breathing loop and high pressure systems must also be performed diligently to ensure the apparatus will function correctly when diving HP PPO2 and sensor condition and battery levels are monitored by the system The readings from these systems are displayed during the pre dive checks The Head Up Display and the Main display are able to advise the user of any readings considered outside safe conditions See full manual on the alarm conditions If you are not happy with any of these readings always check the problem and do not dive the LSS back to index Reduced Pre Dive checks These tests are performed if the unit has switched off then turned back on again and it is less than 30 minutes since the last full pre dive checks These tests are reduced to limit the annoyance of performing the same tests over again and reduce alarm blindness where users simply skip tests However it is imperative that full system checks and the pre breathe sequence in particular be performed if any mechanical disturbance or other incidents have occurred since the last full pre dive checks that may affect the performance of the LSS If any Pre Dive screen is aborted the warning DO NOT DIVE will be shown in the main dry screen Do not dive the unit until all Pre Dive checks have been completed successfully An ABORT is logged in the memory An abort at any time will clear all previous checks This will then force a 18hour pre dive sequence back to index Pre Breathe Pre breathing the LSS prior to diving is the most important of the Pre Dive checks It checks that the CO2 filtering is operating If it is not operating correctly eg there is a bypass of CO2 then any affects such as passing out or dizziness can be treated properly in safe dry conditions There is a timer on the PREBREATHE screen of 5 minutes The screen can not be exited unless by ABORT until 5 minutes has been completed Always complete the pre breathe diligently If any adverse symptoms are felt or seen by other people during this time then stop breathing and check the filter and seal Do not dive back to index Auto Calibration The Sentinel LSS is able to perform accurate calibration of the Partial Pressure Oxygen PPO2 cells in ambient air This has particular importance on the ease and accuracy of achieving calibrated PPO2 cells The Sentinel is able to measure atmospheric pressure during calibration and make the appropriate calibration adjustments for thePPO2 even at altitude Cell health is also logged and cell changedouts are prompted for When performing PPO2 cell calibrations it is important the calibration gas and ambient pressure are known By using ambient air as the calibration gas this is known accurately The Sentinel uses advanced empirical techniques to ensure the accuracy of the ambient air calibration To ensure that ambient air is exposed to the cells a filter detector is fitted to the centre Canister Duration Meter CDM spindle of the filter housing When the detector changes from a filter OUT to a filter IN condition the Sentinel immediately performs the calibration This state change ensures a The breathing loop is exposed to ambient pressure ie not over pressurised b The breathing loop must be open And therefore the gas must be ambient air Using the system above has advantages over an oxygen calibration because a Air is a known Cal Gas b Over pressurisation of the loop cannot occur changing the PO2 c There is no flush routine required This sequence is also triggered when the connector is inserted from the filter CDM module into the system The filter detector must be kept clean to ensure correct operation When the calibration condition is triggered the reading from the cells is checked to ensure the PPO2 cells are inserted and are within the correct range If they are not correct then the calibration will be completed when the cells are inserted In this condition it is advised to ensure PPO2 cells are inserted correctly prior to a filter replacement and the CDM connector being inserted When the calibration has been completed the LSS will restart the full Pre Dive checks routine first showing the state of the PPO2 cells If an error has occurred during calibration then an O2Cell Cal err warning will be displayed in the Status screen The dry screen saver will show DO NOT DIVE The Status screen can be seen in Level 1 units by button pushes when dry and diving The Status screen shows detailed status of all alarms and readings taken by the LSS See full manual for details If at any time the user wishes to perform a manual oxygen sensor calibration this can be initiated from the Setup screen However the canister must be exposed to air and the mouthpiece open Otherwise an incorrect calibration will be performed It is advised that all the sensors and filter in out detector be maintained to ensure the automatic calibration performs reliably without the need for manual calibration back to index Canister Duration Meter The Sentinel LSS utilises a patented US Navy designed canister duration meter CDM under license This meter relies upon the exothermic reaction of the CO2 absorbent The use of temperature sensors to determine the status of the CO2 absorbent has been performed in laboratory conditions for many years The system detects a complex reaction wave front through the absorbent A proprietary data analysis algorithm then produces a considerably more accurate prediction of absorbent usage than other inventions of this type The readings from the CDM are shown as a percentage of canister duration remaining 99 fresh canister 0 Completely used canister with a likelihood of CO2 breakthrough The duration of the canister depends mainly on the amount of CO2 being produced by the diver and the depth of the dive The CDM is a useful feature to get extended duration from the canister when lower CO2 rates are generated by the diver After use however CO2 filters should always be changed every 48 hours independently of the CDM meter reading even assuming part used filters have been stored in a sealed loop The CDM will not detect breakthrough conditions of a poorly packed canister Therefore Pre Breathe checks must always be carried out to ensure CO2 is being absorbed correctly by the filter The CDM contains 8 thermistors arranged longitudinally through the canister absorption path The readings from these 8 thermistors are logged and analysed by the system In this manual it is not appropriate to explain this data analysis in detail However it is appropriate to describe some of the limitations of the device The CO2 absorbent produces heat when CO2 is absorbed However there is also a temperature rise even when incomplete absorption of the CO2 in the breathing gas is achieved This is a potentially dangerous situation as the system appears to be working correctly as there is still a measurable temperature rise and wave front in the system The human body is tolerant to only approximately 5 to 10mBar of CO2 ref CE standards for a life support system A well packed fresh canister absorbs all the exhaled CO2 for a period of time until an amount of CO2 starts to creep through When this level reaches 5mb it is assumed there is no life left in the filter However even at 5mb there is still considerable thermal activity within the filter So be aware that a well packed and well maintained canister is key in achieving a life support system The CDM is not a substitute for good system maintenance and Pre Dive checks Always use your training and discipline to ensure the sub systems in the LSS are operating correctly Critical components and potential failures are a The filter seal in the Canister head b The filter O ring at the base of the CDM c The auto packing spring system d Used or out of date filter material Below is a graph of the data log from a chamber breathing system test dive 1 6litres of CO2 is being fed into the system every minute The external water temperature is approximately 4 degrees Celsius It shows the thermistor readings on an arbitrary scale canister remaining percent prediction and depth in metres The endpoint of the graph is when the CO2 levels reach 5mBar break through back to index The thermistor curves at the beginning of the dive as the canister heats up have a different shape to the middle to latter part of the dive It is not sufficient to simply look for the position of the hottest part of the canister This will give poor predictions of canister duration A proprietary technique and algorithm analyses the curve and will generate the appropriate alarm If the filter is not changed within 7 days the filter percent is forced to 0 The filter should always be kept sealed until required for use Once installed the filter should be changed within 48 hours even if it has not been fully used through breathing When installed and being unused the LSS should have its breathing loop closed so that external air does not accelerate the degradation of the filter However once open and used even if only a little the filter will continue to degrade and change its characteristics post dive Therefore as previously stated the filter should always be changed within 48hours of opening and or use Partially used filters should be stored in the LSS with a closed breathing loop back to index Backup Canister Duration Meter The CO2 created by the diver is in direct proportion to the oxygen breathed The oxygen metabolized by the body is replaced by the injection of oxygen into the breathing loop By knowing the volume of gas injected the amount of metabolized oxygen and therefore the amount of CO2 created can be calculated From tests the duration of the filter types has been determined and the corresponding volume of CO2 absorbed before the filter begins to bypass Using these principles the system measures the amount of gas injected by the solenoid valve and converts it to minutes remaining at CE CO2 rates Although the displayed minutes are at CE CO2 generation standards the minutes will tick down more slowly if the diver is breathing at a reduced rate This will be the most common scenario However in the unusual condition of CO2 generation at an elevated rate compared to 1 6ltr min then the minutes will tick off more quickly If the diver knows a particularly strenuous dive is ahead they should allow extra conservatism in the minutes remaining counter for that dive The remaining duration in minutes is displayed on the Summary screen under STACK and checked for in the alarm system The volume count is reset when the filter is replaced and confirmed in the canister changed or filter reset screens This minutes counter should be used in conjunction with the CDM to determine the appropriate state of the filter For Level 2 and 3 users excessive manual O2 injection will reduce the accuracy of the back up counter as the solenoid valve will not fire as often If in doubt replace the filter and perform full pre dive checks back to index Auto turn on Normal practice and training is for the user to turn the LSS on by hand and go through the pre dive checks The following failsafe additions are to reduce diver error where the LSS is turned off prior to breathing on the unit The basis for the auto breathe software is to reduce the chance of accidental death by breathing on a LSS that is in off sleeping state This has happened in several cases The common method to reduce the likelihood of this is to have wet contacts that turn the unit on when wet This is good for surface swimming However a chamber or non wet use of the LSS may occasionally occur Wet contacts can also reduce battery life in wet environments Hence this detection of a ppo2 drop simulating breathing is an improvement to the wet contact system as it covers most cases of accidental use when the LSS is currently off and when a person forgets to turn the LSS on before breathing on the system back to index Breathing detection turn on rules 1 Turn on if ppo2 0 17bar and 0 05bar If cells are removed or read 0 00 then the unit will only turn on with depth or by the user pressing a switch This has to be done to conserve battery power when the user takes out ppo2 cells for storage or during transport Current other LSS designs and CE approvals require a reduce safety margin than achieved even with this power save scenario In other words the chance of the user taking out the cells and accidentally not turning the unit on before breathing falls into user setup error that should not routinely occur due to training and a good pre dive check regime Other errors of no turn on of hp etc are much more likely and should be reduced by proper training and the intelligent alarm systems 2 Turn on if ppo2 drops a specified period in a given time If the diver does not have hp o2 turned on alarms on the HUD and Primary display will occur as soon as auto turn on occurs Deaths have usually occurred because the diver has not been warned of a dangerous condition Hence this method provides increased warnings whenever loop ppo2 is breathed when the unit is off Compared with false turn ons due to dome removal or flushing with diluent when at the surface or small shortfalls in battery efficiency the auto turn on is a major safety improvement Breathing the loop in all circumstances where the unit is breathable and ppo2 cells operative will cause a safe turn on The additional safety features described should never be used as routine The unit should always be turned on by the user and pre dive checks carried out as required in training and the operations manual However testing and confidence in this auto turn on should be carried out occasionally under safe 0 70 bar or greater conditions To do this ensure the unit is off flush with diluent until the PO2 falls and the LSS turns on The following screen is displayed when the auto breathe detects breathing when the unit is sleeping This screen will remain on until the PO2 goes back to the setpoint currently active To turn the unit off a long press of both switches is needed To continue to the pre dive setup screen do a press of either switch back to index Sensor polling The LSS has a method of automatically removing O 2 sensor cells from the PO 2 averaging This is based on a set of rules For advanced users Level 2 and 3 only if the operator considers these are not appropriate for a particular type of cell failure then any individual cell can be turned off manually This can be accessed from the Cells option in the Dvo screen Rules 1 If all cells have been disabled by the user the LSS control system is turned off 2 If a single cell is below 0 15 bar or above 3 00bar then it will be disabled the system denotes this with an N next to the cell 3 If after item 2 all 3 cells are disabled for the same fault then all cells will be re enabled this ensures that if the O 2 is very high or very low and all the cells agree then the O 2 is probably very high or low accordingly 4 If all cells are enabled and have no faults then each cell is checked to see how many other cells it is within 0 20bar of a If all cells are within 0 20bar of each other then all cells will be enabled b If two cells are within 0 20bar of each other and one cell is not then the cell that is not within 0 20bar of the others will be disabled c If no cells are within 0 20bar of each other then all cells will be kept enabled 5 If all 3 cells are disabled with the same fault at this stage then all will be re enabled 6 All enabled cells are then used in the PO 2 averaging Any cell disabled in these calculations will have a D or N shown against it in the O 2 sensor Screen 7 Examples a Cell 1 0 5bar cell 2 0 60bar cell 3 0 70bar All cells used rule 4a b Cell 1 0 3bar cell 2 0 60bar cell 3 0 70bar Cells 2 and 3 only used rule 4b c Cell 1 0 3bar cell 2 0 60bar cell 3 0 14bar Cell 1 and 2 only used rule 2 d Cell 1 0 3bar cell 2 0 60bar cell 3 0 90bar All cells used as no obvious fault in any single cell rule 4c back to index HUD and Colour Screen The LSS can be routinely dived by using the Heads Up Display HUD as the main underwater human interface This frees up the diver to concentrate on the mission or dive in hand If the HUD comes out of Green for go mode then the diver can refer to the main display and investigate the additional status information The main display utilises colour to make it quick to see the general status coupled with unprecedented clarity of information To ensure the HUD display is still operating correctly and to add a wake up call to the diver all LEDs in the HUD will routinely flash once every minute The HUD colour screen and uncluttered screen layouts are key to providing the diver with essential information in high stress scenarios There are 3 main warning levels Flashing Red warning is activated when a dive should be aborted on open circuit or not started o If diving the diver should switch to the bailout gas o The HUD vibration alarm will vibrate every ¼ second for 10 seconds then repeat the 10 second alarm every minute Solid Green and Blue LEDs warning is activated when a manageable error situation is in place The correct response is to ascend slowly monitoring the Primary display Solid Green means there are no detected problems The Led states are configured for colour blind as well as highly stressed divers The position of the LEDs coupled with the flashing or solid state provide conditions that can not be confused with one another Also during stressful dive scenarios the position and status is quick to comprehend and therefore intuitively the desired response is performed The white LED indicates decompression status White LED off no decompression White LED flashing slowly decompression required currently deeper than deco ceiling White LED solid at decompression stop White LED flashing fast shallower than decompression ceiling The Led states are configured for colour blind as well as high stressed divers The position of on LEDs the flashing or solid state provide conditions that can not be confused with one another Also during stressful dive scenarios the position and status is quick to comprehend and therefore intuitively the correct response is performed back to index Detailed Alarm conditions Red alarms take priority in the HUD over Green Blue alarms back to index With the Sentinel a key task has been to process the fault levels and error conditions to indicate the status of the rebreather to OK system ok to dive solid Green Check alarms ascend safely on closed circuit Green Blue LED Abort dive ascend safely on bailout gas Red alarm The status and summary screens provide the user with extra information on an alarm state or states to assist in taking the appropriate action This information is in English and all users should be adequately trained in interpreting this information appropriately back to index The table shows what status is shown for specific problems back to index The main colour screen display provides more detailed alarm status including PPO2 o On setpoint o Too high above setpoint o Too low below setpoint o Transitioning automatic setpoint changing or ascent descent causing large ppo2 changes o Hypoxic o Hyperoxic High Pressure o Oxygen Too Low o Oxygen usage too high leak o Diluent Too Low o Diluent usage too high leak Decompression o Stops required o Too shallow ceiling limit breached o At deco stop ok o Close to decompression stop Gas change Valve firing ok Battery o Low o Empty o Charging Ascent rate Depth limit Pre Dive checks incomplete Cells o Cell calibration incorrect o Cell calibration not performed o Cell error readings out of range Filter o percentage o not fitted o empty o low back to index New User Interface Screens Dive screens The HP contents are displayed for 10seconds after a short press of the right button back to index Surface dry screen The Surface Dry Screen above shows key information including a summary of error states advising either DIVE OK or DO NOT DIVE If DO NOT DIVE is displayed do not dive the LSS Check the summary screen and perform the necessary remedial tasks back to index back to index See the alarms tables for a full list of errors The screen above shows a short form of the alarms To see the full error information do a short press of both buttons from this Status screen The full summary screen is then displayed See full manual on description of the summary screen In the Level 1 unit all critical information and tasks are performed during the pre dive checks In Level 2 and 3 units the gases and diluent being used need to be configured and checked prior to each dive The additional menus and features that make the Sentinel able to show advanced and graphical information eg depth profile of logged dives as well settings to adapt the LSS to your particular preferences and style of diving As the Check and Dive simplicity of the Sentinel makes it quick and easy to get confidence that the LSS is ready for use Using intelligent monitoring and experience the integrated system determine the appropriate tests and checks that the diver needs to perform to get the LSS ready for use Any problems are described clearly on the Main screen and Summary screen The on screen check list guides you through all the steps Any problems are described clearly on the Summary screen and Main dry screen Both of these screens show additional information that may be interesting or useful to the diver The Status screen can be seen in Level 1 units by buttons when dry when diving The Summary screen shows detailed status of all alarms and readings taken by the LSS See full manual for details The options screen can be seen in Level 1 units by pushing a button when in surface mode The options menu gives access to other screens such as Log book Setup and simulate screens See the full manual for a list of all options available See the menu flow chart for a summary of how to access the different screens When in dive mode and the system is OK if the user displays a screen other than the main diving screens eg deco or DVo the PPO2 is displayed in the top right corner of the screen together with the status LS OK This allows the diver to see the PPO2 even if performing other tasks on the LSS back to index Screen and menu navigation See the menu tree diagrams for details on where the menus are for different dive and level configurations Dive options screen For Level 1 units this is only accessible in surface mode from the options menu For Level 2 and 3 units this can also be accessed while diving from the decompression information screen This screen allows the diver to change parameters appropriate to the specific mission or personal preferences These are Light Mode o On o On when diving timed when in surface mode o Timed when diving and in surface mode HUD brightness o Hi brightness for daylight and bright conditions o Low for cave and night diving Last stop depth o 3m or 10ft o 4 5m or 15ft o 6m or 20ft Safety factor Level 2 and 3 only CNS alarm level Level 2 and 3 only Auto Setpoint max Level 2 and 3 only o 1 2Bar o 1 3Bar HP alarms for Dil and O2 Level 2 and 3 only o This allows the diver to turn off High pressure level and usage alarms when using off board gases For safety reasons if the alarms are

    Original URL path: http://www.therebreathersite.nl/05_Reviews/Sentinel.htm (2016-05-02)
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  • Divex Stealth
    liquid peat we made our way over granite boulders down to 12 metres As we sank into the dark brown gloom I mused that by adding a little flavouring we could sell this water as Guinness As the depth increased I could sense the extra diluent gas air in this case being automatically added into the breathing loop to compensate for the compression of the counterlungs On the bottom Paul carried out routine checks Green LED A steady green LED light in my mask reassured me that everything was working normally and that the set was doing all the thinking for me I could relax and devote my entire attention and both hands to the job in hand crawling over granite boulders The set s low profile meant I could hardly tell it was there It was so quiet that I could distinctly hear Paul s occasional comments to the surface over the Divex through water communicator After a circuit or two of the bottom the boulders all looked remarkably similar and the bottom was singularly lacking in the usual supermarket trolleys or other useful reference points we began our ascent The set could have given me 3 6 hours at the bottom of the quarry and with the controlled oxygen partial pressure of 1 3 bars it could have given me a maximum no decompression depth of 18msw very beneficial I was told for Special Forces divers covertly locking in and out of submarines Ascending was a slightly novel experience because this time in addition to ensuring the adequate venting of my drysuit and Stealth integrated buoyancy compensator some additional attention had to be paid to the venting of the counterlungs A standard exhaust valve had to be opened to ensure continued comfort of breathing during the ascent as the gas in the breathing circuit expanded Following a most enjoyable dive and useful quarry reconnaissance I soon realised that I had become an instant convert This was what the Stealth rebreather was all about The next step was to return to the luxury of Divex s indoor training tank to try out yet another of the Stealth s unique features Once back at Divex s headquarters I was shown around their state of the art lecture room Then as if driven by osmotic pressure we ended up at the training tank Rigged once more in the Stealth I climbed down the ladder into the tank Waiting for me at the bottom was what looked like a twin SCUBA set Add ons However this was a special rig called the Supplementary Breathing Supply SBS Among other add ons it had a special whip fitted with a quick connect disconnect termination The primary purpose of the rig was as an additional emergency gas supply for decompression stops for the SBS would normally be deployed beneath the dive boat The exercise for me was to disconnect the open circuit emergency bail out supply hose on the front of the Stealth Dual Mode

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  • Divex CDLSE
    reserve battery Vacuum sealed electronics unit Water tolerant breathing circuit design reducing the likelihood of a caustic cocktail Multiple open circuit bail out options available Oxygen sensors and electronic circuitry protected from moisture ingress Standard cylinder charging pressures 300 bar A discreet head mounted light sensitive LED indicating equipment status Advanced back light LCD display module presenting detailed information on the life control system Automatic diluent gas addition allowing hands free operation on descent ADV Dual bag counter lung design DIN fittings for high pressure o ring seal security Three independent high performance oxygen sensors True oxygen sensor vote out logic to eliminate the input of a faulty oxygen sensor Data acquisition black box facility Diver configurable alarm level settings for cylinder pressures dive time maximum depth altitude ascend rate language Real time link between the life support system and the surface Supervisor s Monitoring Outfit Accessories Non magnetic hardwire communications system with helium speech un scrambler Non magnetic hand held mask mounted torch Non magnetic fins Non magnetic mask Non magnetic drysuit Non magnetic drysuit inflation system Non magnetic undersuit Dual Mode Mask The Dual Mode Mask DMM is based on the Divator full face mask and incorporates the Divex Changeover Valve and open circuit Demand Valve enabling the diver to alternate between closed circuit and open circuit gas supplies such as the autonomous on board bailout system XBS or the Surface Supplied Gas System SSGS The mask is fitted with a bite mouthpiece water dump valve and a pressure equaliser Provision is made for the fitment of a communications system and the face port has also been modified to accept the Stealth status LED that is held in a receptacle on the diver s left side External Breathing System The eXternal Breathing System XBS has been designed for

    Original URL path: http://www.therebreathersite.nl/05_Reviews/Divex_CDLSE.htm (2016-05-02)
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  • Ouroboros
    own beginning There is a Venetian manuscript on alchemy which depicts the Ouroboros with its body half black symbolizing earth and night and half white denoting heaven and light The unit will be for sale approx Oktober November 2004 for Euro 12 000 1 Breathing loop q C annister o Size 3kg 6 6lbs Version 1 or 4 4kg 8 8lbs Version 2 I was told that the CE version has a 2 2 kg and 6 hours duration or a 4 2 kilo with a 10 hours duration tested at 2 degr Celsius with a breathingrate of 40 l min o Duration Pending CE testing o Canister design radial o Auto packing system q Counter lung o Volume Approximatly 5 5l o Rear mount split lung configuration o Material Ballistic nylon coated polyurethane q Gas injection o O2 Automatic solenoid valve o O2 manual over shoulder injection block with additional external o2 cylinder input capability Version 2 with solenoid shut off o Diluent Automatic addition o Diluent Manual addition over shoulder injection block with additional external diluent input capability Version 2 with Automatation shutoff q Water dump automatic dump valve q Over pressure automatic dump valve q Hoses High impact resistant ballistic nylon coated rubber 2 High pressure q Diluent cylinder capacity 2 litres 232 Bar 15cuft 3400PSI q O2 cylinder capacity 2 litres 232 Bar 15cuft 3400PSI q DIN fitting q Internal small bore 3mm 1 8 stainless high pressure piping q 20micron oxygen filter to protect valve from jamming with continuous flow q External Stainless steel armored hose for cylinder DIN connection q Solid state digital electronic high pressure sensors to feed content and usage rate information to main electronics 3 Electronics Control and display system q Central canister o 3x po2 cell pre processer board in central canister nominal 10mV o2 sensor Passive split to Secondary Main electronics Active amplification of feed to main electronics o 4th cell to feed independent backup po2 and decompression o device eg VR3 q Primary Display full control and detailed system setup o Diluent setup o PO2 setpoint setup o Alarms setup o Log book o Gas profiles o Dive plan o Open circuit bailout o Simulate o PC link o High pressure o2 and diluent displays o Sensor calibration and ON OFF Auto select of individual sensors or all o Summary of system values and alarm status o Decompression requirements o Game o Calendar o Altitude Atmospheric pressure o Main dive screen depth time Total time to surface PPo2 Setpoint Deco graph o In water dive profile o Backlight q Head Up Display HUD q PO2 Green LED o Steady PO2 on setpoint o Slow flash PO2 just below setpoint o Medium flash 0 1 from setpoint o Fast flash Very high or very low 0 16 and 1 6 q Deco Stop RED LED o Steady At deco stop o Slow flash Deco stop required but much too deep o Medium flash close to deco stop o Fast

    Original URL path: http://www.therebreathersite.nl/11_Closed%20Circuit%20Rebreathers/ouroboros.htm (2016-05-02)
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