Scuba Force SF2 ECCR Operation Manual Download

Page: 1 / 44

SF2 ECCR

OPERATION MANUAL

Summary of Contents for SF2 ECCR

Page 1: ...SF2 ECCR OPERATION MANUAL ...

Page 2: ...dpart 19 4 3 Frame and accessoires 20 Chapter 5 SF2 Assembly 21 5 1 Cylinder assembly 21 5 2 Bellow assembly 21 5 3 Scrubber and carbon fiber tube assembly 23 5 4 Battrey solenoid assembly 24 5 5 Sensor assembly 24 5 6 Loop assembly 26 Chapter 6 Assembly accessories 29 6 1 Manual Add Kit Off Board Gas 29 6 2 Assembly regulators wing harness 30 Chapter 7 Calibration oxygen sensors 33 Chapter 8 Pred...

Page 3: ... you take the time to read these instructions It contains many important safety instructions and techniques that will help to extend the life of your rebreather On line manual can be located on our website www scubaforce eu For further questions we can be contacted at SCUBA FORCE Dive2gether net Tauchsport GmbH Reststrauch 197 41199 Mönchengladbach Tel 49 0 2166 1456880 Email mail scubaforce eu De...

Page 4: ...ed with warning caution and note according to the following symbols WARNING A WARNING indicates a practice or situation which if not avoided could result in hazardous or unsafe practices that may result in severe personal injury or death CAUTION CAUTION indicates a situation or usage instruction that could damage the product and result in injury to the user NOTE NOTE emphasizes important points no...

Page 5: ...skills in a supervised environment and under the supervision of an instructor who is certified by a nationally recognized diving training organization and authorized to train in SF2 rebreather use WARNING Careless use of the SF2 can cause unconsciousness due to lack of oxygen in any environment without prior warning signs Careless use of the SF2 at depths underwater greater than 6 MSW meters of se...

Page 6: ...ng a large fan base among sport wreck and cave divers Whenever high reliability and special performance is required the SF2 is used Soon you too will be one of the enthusiastic fans of rebreather diving in general and the SF2 in particular But first you have to study and work Your SF2 diving course will start shortly and within a short period of time you will be confronted with many new theoretica...

Page 7: ...ygen flows into the system via an electronically controlled solenoid valve solenoid until it again corresponds to the set value What sounds simple in theory is influenced by various factors in practice for example increasing or decreasing pressure when descending or ascending In contrast to the open circuit system the diver does not release any gas into the environment when diving so he breathes i...

Page 8: ...he environment when we breathe But since our breathing circuit is closed the CO2 also remains in the system Hypercapnia i e an increase in the level of carbon dioxide in the blood approx 45 mmHg can quickly lead to life threatening situations especially under water To prevent this from happening the resulting CO2 is bound in a canister with soda lime which we will also go into briefly later ...

Page 9: ... important components of the SF2 and a rebreather in general The only thing missing is the gas addition supply As mentioned at the beginning the consumed oxygen is added back to the system in pure form The SF2 has an oxygen cylinder which again from the perspective of the diver wearing the device located on the divers right side Pure oxygen becomes toxic from a depth of about twenty feet six meter...

Page 10: ...Manual Version 19 01 2019 II Page 10 of 44 SF2 ECCR OPERATION MANUAL SCHEMATIC REPRESENTATION SF2 ECCR ...

Page 11: ...hydroxide are constantly renewed during the process and are included in the reaction again Only the calcium hydroxide is consumed and therefore limits the absorption capacity service life of the lime To understand The soda lime does not bind the CO2 in a gaseous state e g Filter cartridges in the compressor Due to the completely different type of binding filter cartridges release the filtered CO2 ...

Page 12: ...be used for 6 hours The same canister filled and used in 37 degrees Fahrenheit 3 C cold mountain lake would be enough for 3 hours At 20 C e g the lime filtration rate is 100 at 15 C it drops to around 80 at 10 C to around 65 and at 4 C to less than 50 In terms of temperature dependent filtering performance it is essential to note that the filter rate per unit of time is meant here The lime is not ...

Page 13: ... consumption or CO2 production corresponding to physical activity of about 100 watts That means the theoretical lime filtering time is about 3 5 hours 330 1 5 220 min CAUTION The lime shouldn t under normal conditions Be used for more than three hours This is true both for repetitive dives as well as for single dives corridors WARNING Under extreme conditions the lime Enormous service life As part...

Page 14: ...le and structure of a sensor A galvanic oxygen sensor is a type of fuel cell that converts chemical reaction energy into electrical energy like a battery This means that these sensors do not need an external energization voltage but are the power source themselves Oxygen reacts with the components of the cell redox reaction which creates a current that is proportional to the prevailing oxygen part...

Page 15: ...ead to a measurement error of around 3 1 mbar pressure change corresponds to an error of 0 1 This means that the measurement of the oxygen content must always take place under the same conditions as was previously calibrated Most newer oxygen analyzers however have meanwhile a pressure sensor barometer has been integrated so that the analyzer corrects pressure fluctuations by itself Pressure fluct...

Page 16: ...er the moisture in the gas takes up a certain proportion of the volume and thus also exerts a partial pressure The partial pressures of the remaining gas components are reduced accordingly and the sensor shows less oxygen increasing humidity in the same environment However extreme humidity or even condensation on the sensor surface significantly impair the sensor function Water on the sensor membr...

Page 17: ... output of an R 17 R 22 sensor drops by approx 1 mV per year in air e g from 10 mV to 9 mV or 5 mV in pure oxygen from 50 mV to 45 mV If oxygen sensors are stored in pure oxygen the service life is shortened by about a fifth In the original packaging sensors age much more slowly but they do not rest completely NOTE The aging process of an oxygen sensor does not begin with unpacking but with the da...

Page 18: ...SF2 single components FRONT VIEW Accessoires Wing Backplate Harness SPG s SF2 Components Loop Controller Fischercable BACK VIEW Accessories Diluent and Oxygen Cylinder SF2 Components Lower Carbon Fiber Tube Counterlung Upper Carbon Fiber Tube Scrubber Head Electronics and Sensors ...

Page 19: ...2 Midpart 1 2 3 4 5 6 7 1 Sensor cover underneath are the oxygen sensors 2 Sensor cable 3 Exhalation side with oxygen injection 4 Inhale side 5 Battery box 6 Solenoid 7 Oxygen supply connection 1 2 3 4 1 ADV 2 ADV supply connection 3 Manual injection connection 4 Bellow Counterlung ...

Page 20: ...male pony clamps 2 Manual Add Kit incl Offboard Gas 3 Hose clamps and oxygen hose 4 Hose clamps and diluent hose 5 Breathing Loop with DSV mouthpiece and connectors Scrubber Pony Clamp male 3 liter cylinders The picture shows G5 8 valves on both sides Within the EU the bottles for the oxygen side are delivered with an M26x2 valve ...

Page 21: ...e SF2 diving course under the direct supervision of the diving instructor This gives practical tips and oversees the correct assembly of all components This is the only way to ensure proper functioning WARNING The initial assembly of the SF2 must be under direct supervision by an authorized SF2 instructor Correct assembly guarantees fault free function of the device 5 1 Attaching the cylinders The...

Page 22: ...he unlikely event of damage replaced Components of the midpart 1 Mitpart 2 Bellow 3 Bellow Washer 4 OPV 5 Screws 1 2 3 4 5 First the nut of the OPV must be placed in bellow The bellows clamping disc is pushed into the upper ring of the breathing bellows The curved side points outwards 1 The slightly smaller opening is later pushed over the pusher by the trigger The threaded sockets are lightly gre...

Page 23: ...ht is completely sufficient The material needs light counter pressure so that it does not turn with it The middle part is pushed into the backmount frame The two gas seals must be positioned between the pony clamps and the plate holder Then the lime container is placed on the middle part The O ring on the lime connection 1 must be checked regularly Then the upper carbon tube is mounted Inside the ...

Page 24: ...th a suitable key The battery that powers the solenoid is a standard 9 volt battery This is connected to the system via a splash proof connector Then the screws are tightened again hand tight The following parts are required for the sensor assembly 3 x oxygen sensor 3 x O ring Sensor cover plate 3 x screws First the O rings are placed in position When changing the sensors it often happens that the...

Page 25: ...ensors are simply brought into position The sensor holder plate has three holes These must be positioned correctly so that the screws fit The screws are hand tightened The sensor cables are plugged onto the sensors The length of the cable determines which cable goes to which sensor ...

Page 26: ...ect assembly can cause serious accidents 1 2 1 Valve holder on exhalation side The directional membrane is carefully mounted as shown in the middle picture 2 Valve holder inhalation side The directional membrane is carefully mounted as shown in the middle picture Then the valve supports are inserted into the mouthpiece Exhalation side left inhalation side right Logo position on the mouthpiece as i...

Page 27: ...g pieces of the loop have different diameters to avoid mix ups The difference is difficult to tell with the naked eye It is helpful to push the socket briefly into the head The exhalation side has the larger diameter so it does not fit on the inhalation side The O ring on the exhale side is also thicker than the one on the inhale side When the side is determined the nozzle is pushed into the union...

Page 28: ...Manual Version 19 01 2019 II Page 28 of 44 SF2 ECCR OPERATION MANUAL The actual SF2 is now fully assembled the accessories can now be assembled ...

Page 29: ... allow external gas to be applied and the rebreather to operate with it 1 2 3 5 6 4 7 8 10 9 11 1 1st stage oxygen 2 11st stage diluent 3 LP 15 cm ADV incl Flow Stopper und Quick Disconnect 4 LP 40 cm Manuall Port incl Quick Disconnect 5 LP 50 cm Solenoid incl Flow Stopper und Quick Disconnect 6 LP 80 cm O2 supply Manual Add incl Flow Stopper 7 LP 80 cm Diluent supply Manual Add incl Flow Stopper ...

Page 30: ...u After the bottles have been attached to the SF2 the regulators can be screwed on It is advisable to put the device down as this makes work easier The low pressure hoses must be unscrewed from the manual adds as they are a hindrance during assembly If the low pressure hoses are equipped with Quick Disconnect in the Ready to Dive variant they can simply be clicked on The connectors have a lock fun...

Page 31: ... hoses and the pressure gauges are fed forward through the upper slots of the wing Now the backplate with harness can be mounted on the wing The hoses are carefully guided through the bungees on the harness and reconnected to the manual add Care must be taken to ensure that each hose is connected to the right place otherwise malfunctions will occur ...

Page 32: ...water it can damage the contacts and cause costly repairs The controller of the SF2 has a waterproof plug connection which is secured as shown in the second figure Finally either the HUD or a Petrel Ext Is connected to the Fischer socket There are separate operating instructions for both devices which must also be read carefully The SF2 ECCR is now ready to dive ...

Page 33: ...al reasons for calibrating with pure oxygen Since with rebreather you usually dive with a set point of 1 0 1 3 the calibration with pure oxygen comes closest to the gas mixture In addition an error when calibrating with air has greater effects than with pure Oxygen An error of around 1 with air calibration e g 20 instead of 20 9 corresponds to a deviation of 5 in pure oxygen 95 instead of 100 For ...

Page 34: ...3 times until the sensors have stabilized When the sensors stop swaying in their readings press lightly Gas flow 0 5 5 l min to Calibrate and wait for confirmation Usually the Calibration value set to 98 because it is assumed that there is a certain residual moisture and that the system is not 100 flushed Calibrate the backup computer monitor or the HUD in the same way ...

Page 35: ...you can learn a lot from aviation and emergency medicine where they due detailed incident and accident analyzes checklists have become indispensable 8 1 Check gas flow gas direction in the loop The breathing tube must be checked before every dive as it is the connection between the diver and the SF2 Check the breathing tube for cracks and damage and check the O rings on the connections Take the op...

Page 36: ...h until the OPV blows off Close the loop and wait for 1 2 minutes Now check whether the counterlung is still bulging outwards Now open the mouthpiece and pay attention to whether the residual pressure has been maintained Negative test With the help of the vacuum test the entire system is checked again for leaks The negative pressure test is more sensitive and therefore even more important than the...

Page 37: ...r the outlet pressure relief valve on the counterlung is closed Perform the positive pressure test Stand the SF2 upright and perform the vacuum test 8 4 Predive Check Oxygen side Turn on the controller and breathe out of the loop Turn on the oxygen bottle and check the function of the solenoid and the solenoid shut off Also test whether the controller can keep the setpoint stable Now check the oxy...

Page 38: ...the inflators wing and dry suit Switch on the controller and the monitor Set the pO2 to 0 7 bar with the oxygen MAV and breathe the loop as a test WARNING Always turn on the controller BEFORE going into the water The controller only switches itself during the immersion phase automatically If you swim on the surface and breathe through the loop life threatening hypoxia can occur LET S GO DIVING ...

Page 39: ... let it hang down so that saliva etc can drain off Open the mouthpiece 5 Close the bottles and vent them using MAVs and or inflator Disconnect the oxygen solenoid valve connector 6 Briefly release the tank from the lock so that the head lock can be opened 7 Take off the head remove the head cover and check whether the oxygen sensors are moist If the head is dry the cover plate can be reinstalled T...

Page 40: ... container 11 Remove the counterlung wash it out and place it upside down to dry 12 Regularly disinfect the loop top tube and middle section with counterlung 9 3 Disinfect The breathing circuit of the SF2 should be disinfected regularly in order to prevent the components from becoming infected About every 15 20 diving hours in tropical or warm regions every 10 15 hours the breathing set top tube m...

Page 41: ... robust and low maintenance rebreather but it should still be handled with care and regularly serviced In general all components must be visually checked regularly and cleaned and cared for accordingly In order not to impair the function of the SF2 certain components must be serviced or replaced at regular intervals The following maintenance work may be carried out by the user Replace the O rings ...

Page 42: ...t 7 Negative Test PREDIVE CHECK 1 Controller switch on Loop breathing 2 O2 cylinder open Solenoid Shut off check Solenoid is firing oxygen O2 MAV Shut off check Pressure check closing O2 cylinder O2 Seite 3 Switch Setpoint to 0 19 Breathe empty loop 4 Diluent Tank open ADV Shut off check DIL MAV Shut off check Wing Inflator Pressure check closing DIL Tank DIL Seite 5 Check controller settings plan...

Page 43: ...y breathing gas mixture mixed by the SF2 The use of the SF2 is restricted to diving underwater only by appropriately trained persons Detailed instructions on how to assemble the SF2 including descriptions of the individual components the specific connection between the components and the various safety elements can be found in this manual The user should be able to understand the risks and to asse...

Page 44: ...ult in an oxygen fire and serious injury including death The SF2 requires proper assembly and important safety checks to be performed by the diver prior to diving Details on both points are contained in this manual Using the SF2 without fully checking the system poses an increased risk for the diver Chapter nine of the manual describes post dive care and cleaning and instructions for long term sto...

Search results

Summary of Contents for SF2 ECCR

Reviews:

Related manuals for SF2 ECCR

Brands by name

Popular brands

Scuba Force SF2 ECCR, Operation Manual

Search results

Summary of Contents for SF2 ECCR

Reviews:

Related manuals for SF2 ECCR

Brands by name

Popular brands