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POSEIDON SE7EN+ User Manual

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Poseidon SE7EN
User Manual
Chapter 1
Page 1
+
POSEIDON SE7EN+ USER MANUAL
VERSION 2.5

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Summary of Contents for POSEIDON SE7EN+

  • Page 1 Poseidon SE7EN User Manual Chapter 1 Page 1 POSEIDON SE7EN+ USER MANUAL VERSION 2.5...
  • Page 2 Part 1 – Preparation 8. 1st stages......................24 9. LP hose & HUD to mouthpiece...............26 An Overview of the Poseidon SE7EN+ ..............1 10. Front CC hoses to counter lung T-section............27 Primary Display ....................1 11. Front CC hoses to mouthpiece..............28 Open-Circuit / Closed-Circuit Mouthpiece............2...
  • Page 3 Managing ascents ....................63 Units of measure ..................52 Ending the dive ....................63 Alarm signal area ..................52 Safe diving with the Poseidon SE7EN+ ..............64 Abort! and open circuit alerts ................52 DO NOT DIVE alert ..................52 Chapter 4 - Post-dive procedures General alert ....................53 Electronics alert ...................53...
  • Page 4 Managing ascents .....................121 Deco 40 / Deco Trimix 48m/60 m / Deep Ending the dive ....................121 Safe diving with the Poseidon SE7EN+ ..............122 Introduction ......................84 Update SE7EN+ firmware through the M28 ............123 DECO 40 / DECO TRIMIX 48 / DECO TRIMIX 60 / DEEP 100 ......124 Assembly Technical 60 m Counter lungs to BCD/Harness/Regulators ....85...
  • Page 5 Text, photographs and figures copyright © 2008-2023 substitute for proper training through a legitimate training agency approved by by Poseidon Diving Systems AB Poseidon AB. It is only intended to provide basic information concerning the Poseidon ALL RIGHTS RESERVED SE7EN+.
  • Page 6 SE7EN+ has audible, tactile, and visual warning systems to get your attention, and to advise your diving partner of your status. • Bail Out Valve – in a significant new patented design, the Poseidon SE7EN+ gives you the ability to switch from closed-circuit to open-circuit operation in one easy motion, without the need to search for a spare mouthpiece in an emergency.
  • Page 7 Disclaimer Of Warranty End User License Agreement Poseidon does not warrant the completeness or accuracy of the firmware, or that its use Read the terms of this license agreement (“agreement”) governing the use of the firmware will meet your needs or be uninterrupted or error-free. To the maximum extent permitted provided to you by Poseidon Diving Systems AB (“Poseidon”) carefully before using the...
  • Page 8 Poseidon having access to or the publication of any of your user data. Poseidon shall have no duty to warn you, or any third party of any information transmitted to or that Poseidon shall have access to as the result of your use of the firmware.
  • Page 9 The user shall be able to understand the risk and make an assesment regarding the risk of using the Poseidon SE7EN+, with input from the manual before a dive if the The Poseidon SE7EN+ requires proper pre-dive setup, and several important verifi- diver believes it is needed.
  • Page 10 Appendix 3 covers Poseidon SE7EN+ connected to dive computer M28, Pre-dive procedures. The diluent cylinder for the Poseidon SE7EN+ should only be filled with Grade-E (or equivalent) air. The oxygen cylinder should be filled with oxygen, containing less than 0.4% impurities.
  • Page 11 Poseidon SE7EN+. Figures 1-1 and 1-4 illustrate these locations and the main systems of the Poseidon SE7EN+. The “left” side of Right side water the rig corresponds to a diver’s left side when wearing the rig normally; the...
  • Page 12 User Manual Chapter 1 Page 2 Open circuit/closed circuit mouthpiece One of the most amazing of several technology breakthroughs in the Poseidon SE7EN+ is its Figure 1-3. switch-able mouthpiece. It incorporates a high-performance lightweight open-circuit regulator, HUD with red LED on.
  • Page 13 Page 3 Breathing loop overview Oxygen regulator Electronics module The most visible elements of the front portion of the Poseidon SE7EN+ Oxygen high comprise the breathing loop: breathing hoses; convertible open and closed- pressure sensor circuit mouthpiece with built-in automatic diluent addition valve (ADV); water Diluent regulator diversion manifolds (sometimes referred to as “T-ports”...
  • Page 14 Housing discussion. Gas injection E-module In a fully-closed rebreather like the Poseidon SE7EN+, oxygen is consumed by the diver and a mechanism must be provided for replacement of that used oxygen. Otherwise the mixture will slowly be depleted to dangerously oxygen low levels (hypoxia). The SE7EN+ is designed...
  • Page 15 Poseidon SE7EN User Manual Chapter 1 Page 5 Receiver Figure 1-7. slot Safety latch Smart battery module Retainer screw post Figure 1-8. (Left) Align the retainer screw posts on the Smart Battery with the receiver slots Smart battery care at the top of the Electronics module (note that the 4 contact pins in the housing must align with those on the battery);...
  • Page 16 Page 6 Charging Included with the Poseidon SE7EN+ is a proprietary multi-function desk-top charger unit that includes adapters for most international power outlets. The battery charger has three status lights arranged in a circular pattern on the open section of the base. These are, in counter- clockwise order from the lower left in Figure 1-10: power, “Learn Cycle”...
  • Page 17 • Storing the battery in the Poseidon SE7EN+ enables the depth sensor and the wet switch and remaining no decompression time. on the back of the primary display. If someone wearing the SE7EN+ accidentally falls into the water, the system will automatically power up the rig, enhancing the probability for survival of the user.
  • Page 18 A second, and more commonly used seal is the “ radial “ o-ring. Figure 1-12 shows a typical implementation in the Poseidon SE7EN+ breathing hose and hose connection ports. In contrast to a axial o-ring seal, a radial seal involves a circular groove that goes around a cylin- drical or semi-cylindrical object (it can be a rectangular object with rounded corners provided the corners have a sufficiently large radius –...
  • Page 19 Chapter 1 Page 9 Cylinders and regulators The Poseidon SE7EN (EU version only) is factory-issued with two 3-liter steel or aluminum cylinderswith valves. The oxygen cylinder has a green valve knob and the diluent cylinder has DANGER: a black valve knob. Both cylinders are pressure-rated to aluminium 204 bar/3000 psi / steel Do not fill the oxygen cylinder to more than 135 bar (2000 psi).
  • Page 20 The decompression algorithm requires that air be used as the diluent in the Poseidon SE7EN+. For technical configuration and deeper setups (40, 48, 60 & 100 m / 131, 157, 200 & 328 ft) refer to Appendix 2.
  • Page 21 Chapter 1 Page 11 The Reef app The Poseidon Reef app is a state-of-the-art complement to your rebreather that allows you to plan dives, download and view dive logs, change settings on SE7EN, upgrade firmware and more. The Reef app is available for Android, iOS*, MacOS and Windows, and can be down- loaded from www.poseidon.com/reef.
  • Page 22 Poseidon SE7EN User Manual Chapter 1 Page 12 Part 2 – Assembly Before you start assembling your Poseidon SE7EN+ eCCR, you should perform the fol- lowing preparations: • Make sure you have a scrubber that will last your planned dive(s).
  • Page 23 Besea, harness, and buoyancy wing system for use with the SE7EN+. The front extrusion rail on the Poseidon SE7EN+ accepts the QMR adapter or 11-inch adapter (see Figure 1-14). Attachment of the Besea is as quick as aligning the QMR adapter pin-bolts to the upper holes in the Besea harness as shown in Figure 1-14.
  • Page 24 The Diluent (black knob) tank is mounted on the unit’s left hand side and the oxygen (white Poseidon SE7EN+. Properly adjusted, the tanks should be firmly attached, not being able to knob) is mounted on the unit’s right hand side.
  • Page 25 Figure 1-17. fits on the tanks you intend to use with Thread the tank band through the tank band your Poseidon SE7EN+. bracket, from the back towards the front. Properly adjusted, the tanks should be firmly attached, not being able to move in the tank band, when the buckle is closed and secured around the tank.
  • Page 26 3. Counter lungs to BCD / Harness Attach the counter lungs to the shoulder straps of your BCD/Harness using the velcro straps The counterlungs on the Poseidon SE7EN+ are designed to attach to the backpack straps and on the back side of each counter lugn.
  • Page 27 Poseidon SE7EN User Manual Chapter 1 Page 17 4. Rear CC hoses to counterlung T-connections. Connect the T-connection to the top port in each counterlung. Radial seal surface Radial o-ring seal Thread connection post Figure 1-23. Insert the right hand water diversion Checkvalve port manifold into the port on the right counterlung.
  • Page 28 Poseidon SE7EN User Manual Chapter 1 Page 18 Figure 1-25 shows a cross section of the water diversion manifold. A quick inspection will show that on one side (the “front”) you can insert a finger and feel an open vertical tube leading down to the threaded counterlung connection post (see Figure 1-25).
  • Page 29 There are a total of eight (8) hose connections to be made in the assembly of the Poseidon SE7EN+. Assembly of these hoses starts at the gas processor, and continues Repeat these steps with the right rear breathing hose, so the rig is as shown in Figure 1-27.
  • Page 30 Poseidon SE7EN User Manual Chapter 1 Page 20 Figure 1-31. Attach the right counterlung Figure 1-32. Attach the left rear breathing water diversion manifold to the right rear hose to the left counterlung shoulder port. breathing hose. ”Radial” o-ring seal Sealing surface for ”radial”...
  • Page 31 6. Attaching the cylinders Attach the two tanks to the canister housing tank connections and secure them with the tank The Poseidon SE7EN+ is equipped with one mounting bracket holding two nylon cylinder straps. straps with cam buckles on each side. Attachment of the diluent cylinder (black valve handle) is illustrated in Figures 1-33 and 1-34.
  • Page 32 7. E-module Check and make sure that the two o-rigs around the e-module are in place and without At the heart of the Poseidon SE7EN+ is an electronic, pneumatic, control, and user feedback damage. system. The electronics module, shown at the center of Figure 1-35, contains the primary...
  • Page 33 DANGER: The electronics module contains the most important life-critical element of the Poseidon SE7EN+: the oxygen sensors. A leak into the electronics housing may contaminate the oxygen sensors WARNING: and prevent them from providing correct readings. Dual radial...
  • Page 34 If contamination occurs, the compromised components Figure 1-38. should be taken to an authorized Poseidon Tech Center representative or a qualified tech dive 16 cm Low Pressure hose’s shop technician for oxygen cleaning.
  • Page 35 Never expose these components to compressed air, which can contaminate components with oil. Always have these components cleaned and serviced by a Poseidon Tech Center representative or other qualified personnel. Always use oxygen- compatible lubricants when servicing o-rings and seals. Open oxygen cylinder valves slowly.
  • Page 36 Poseidon SE7EN User Manual Chapter 1 Page 26 9. LP hose & HUD to mouthpiece Connect the long braided 90 cm Low Pressure hose to a IP port on the diluent 1st stage. See Figure 1-42. Make sure the connection o-ring is in place and without damages.
  • Page 37 Poseidon SE7EN User Manual Chapter 1 Page 27 10. Front CC hoses to counter lung T-section Connect the left front CC loop hose to the inhalation counter lung T-connection. Lay out the two remaining breathing hoses. Connect the right front breathing hose to the front port of the right counterlung water diversion manifold (Figures 1-48).
  • Page 38 Connect the front right CC loop hose to the exhalation side CC loop hose connection of the valve only with a Poseidon original manufacture mouthpiece checkvalve. Attach the right hand mouthpiece.
  • Page 39 IMPORTANT: Poseidon original manufacture mouthpiece checkvalve. Attach the left front breathing hose to The left and right checkvalves and their carrier plates in the the upstream CC port as shown in Figure 1-50, following the standard hose connection pro- mouthpiece are identical to each other.
  • Page 40 Poseidon SE7EN User Manual Chapter 1 Page 30 12. Cover SE7EN+ Cover Figure 1-52. Press the upper part forwards so the mechanism engages. Make sure the cover is securely fixed “click”. Figure 1-51. Hook the cover lower part to the tank connection bracket.
  • Page 41 The outer shell of this system (shown in Figure 1-54) comprises the structural backbone of the Poseidon SE7EN+ and both the diluent and oxygen cylinders attach to the side of this extruded The SE7EN and its repackable cartridge has been tested for CO2 endurance in two ways inline aluminium tube.
  • Page 42 It is also good practice to rinse, disinfect, and dry the absorbent sponge following a dive. Any disinfectant solution that doesn’t have a negative effect on plastics and/or rubber can be used for this purpose. Poseidon recommends using a Figure 1-57. Remove the End Plate.
  • Page 43 It is good practice to rinse, disinfect, and dry the lower absorbent sponge following a dive. Any disinfectant solution that doesn’t have a negative effect on plastics and/or rubber can be used for this purpose. Poseidon recommends using a disinfectant called Gigasept™ or a disinfec- tant called Virkon.
  • Page 44 Figure 1-64. Figure 1-65. Figure 1-66. Loading the Cartridge End Cap into the new Loading the Poseidon SE7EN+ Car- Insert cartridge top plate and inspect Inspect and lubricate cartridge housing stuffed Repackable Scrubber Cartridge tridge Top Cap into the Repackable the face-seal o-ring.
  • Page 45 O-rings and their sealing surfaces are at the heart of reliable operation of the Poseidon SE7EN+. Pay attention to this detail when you assemble the rig.
  • Page 46 Poseidon SE7EN User Manual Chapter 1 Page 36 WARNING: DANGER: Because CO2 exists naturally in the atmosphere, Sofnolime 797 Placing weights between the counterlung and counterlung shell openly exposed to the atmosphere will expire in 24 affects the work of breathing and hydrostatic balance. Doing so is hours.
  • Page 47 Local legislation may force more frequent testing. Regulators should be rebuilt every two years. Oxygen regulators, cylinders, and cylinder valves should be oxygen cleaned every two years. All of these services form a part of the Poseidon Tech Center biennial service. Contact your Poseidon representative for details.
  • Page 48 Before the dive, make sure there is enough diluent (air) and oxygen to carry out the dive you plan to do. The EU version of the Poseidon SE7EN comes with a 3-liter/ 183-cubic inch aluminum diluent (air) cylinder (with black valve knob) with a rated fill pressure of 204 bari, or a 3-liter steel diluent (air) cylinder (with black valve knob) with a rated fill pressure of 300 bar.
  • Page 49 Poseidon SE7EN User Manual Chapter 2 Page 39 viewed standing in front of the valve and looking at the valve). Place the mouthpiece switch lever to closed-circuit (CC) position and inhale any residual gas within the breathing loop, WARNING: exhaling it through the nose to remove it from the breathing loop. Repeat this procedure several...
  • Page 50 Figure 2-2. Initial displays during the first Figure 2-3. When the top and bottom Poseidon SE7EN+ serial number (Figure 2-2). The firmware version number is shown in large five seconds of Power-up, showing firmware segments on the display starts to blink, digits on the left and right side of the display screen to identify firmware version (left) and patch version and serial number.
  • Page 51 4–12 seconds to complete. Certain tests that alarm systems in the Poseidon SE7EN+. You will see and hear the rig as it tests the HUD light involve some action by the diver allow for up to 2 minutes to complete, if necessary.
  • Page 52 Poseidon Tech Center for assistance. In general, repeated failure of any one of these automated • Test 41: Scrubber installed confirmation tests indicates a problem with the Poseidon SE7EN+ that will not be serviceable by the user. • Test 43: Mouthpiece OC test •...
  • Page 53 Test 43 (Mouthpiece in OC position), diver. By confirming test 41 the diver acknowledges that he/she has installed a canister prior to displaying Open-Circuit icon to indicate powering up the Poseidon SE7EN+. that the mouthpiece must be placed in the Open-Circuit position.
  • Page 54 Poseidon SE7EN User Manual Chapter 2 Page 44 Oxygen and diluent cylinder supplies (test 44 & 45) Tests 44 and 45 determine whether the Oxygen and Diluent cylinders, respectively, are turned on and have sufficient gas to conduct a dive. Following proper procedure, both cylinders will have been in the off position when Test 44 is reached (if not, gas will be wasted during Tests 24–27,...
  • Page 55 Like the Negative Pressure Loop test, this test could very easily be performed manually. However, one of the features of the Poseidon SE7EN+ – the placement of the depth sensor within the breathing loop – allows this test to be performed automatically. And so it is –...
  • Page 56 If no amount of repositioning of the mouthpiece lever or HUD Figure 2-11. allows the system to pass Test 50, then contact an authorized Poseidon Service Center. Test 53 – Oxygen Sensor calibration. This test is by far the most important of all the pre-dive tests, as it is determining whether the oxygen sensors are providing true values for the partial pressure of oxygen (PO ).
  • Page 57 Each rebreather unit must be brought to a qualified Poseidon Service Center at least once every two years, to receive updates and make any necessary repairs or adjustments. When Test 55 is displayed, the number in the lower-right corner of the screen (adjacent to the small clock icon) indicates the number of weeks remaining before servicing will be required.
  • Page 58 Poseidon SE7EN User Manual Chapter 2 Page 48 Poseidon SE7EN+ Pre-dive checklist POSEIDON REBREATHER POSEIDON REBREATHER CHECK LIST PRE-DIVE CHECK LIST Check for damage, dirt and deteriorations Start up Procedure during assembly. Check Mouthpiece rubber. CLOSE OPV, OPEN-CIRCUIT mode. Check that the battery is charged.
  • Page 59 Chapter 3 Page 49 Chapter 3 – Dive procedures HUD vibrator Perhaps the most important alarm signal on the Poseidon SE7EN+ is a customized version of the patented Juergensen Marine DIVA vibrator system, located in the HUD mounted on the mouthpiece.
  • Page 60 (LCD), with pre-printed numerals and symbols, and provides the diver with important information concerning sensor readings, system messages, decompression status, and other data during the course of the dive. It is extremely important that all Poseidon SE7EN+ divers understand how to read the information contained in the Primary Display, particularly concerning various alarm conditions.
  • Page 61 Failure to do so could lead to serious injury or death. When the Poseidon SE7EN+ electronics are started (via the wet switch, or when the battery is inserted into the unit), the LCD screen momentarily shows all elements of the display, as illus-...
  • Page 62 Figure 3-7. Alarm signal area. Figure 3-7b. Alarm signal area. mean. It is important that all Poseidon SE7EN+ divers become familiar with these symbols and values, what they mean, and how to respond when they are not displaying appropriate values (or are flashing).
  • Page 63 IMPORTANT: bolt on the screen. This symbol indicates that a It is the sole responsibility of each and every Poseidon SE7EN+ problem has been detected with the electron- diver to understand all of the alarm systems and conditions,...
  • Page 64 The oxygen partial pressure (PO2) in the breathing loop is displayed prominently in the upper One of the important new features in the Poseidon SE7EN+ is the Hyperoxic Linearity test. left corner of the Primary Display. This is perhaps the most important number on the entire...
  • Page 65 “nc” with “n” in the lower half, and “c” in the upper half (mouthpiece is not fully in either Poseidon SE7EN+ is the automatic oxygen position), or “un” with “u” in the upper half, and “n” in the lower half (mouthpiece position sensor validation system, which monitors the is unknown).
  • Page 66 Poseidon SE7EN User Manual Chapter 3 Page 56 Maximum depth / Ceiling In most circumstances,the maximum depth achieved during the dive is displayed below the current depth, in the lower-left corner of the IMPORTANT: Primary Display, to the left of the word “Max”.
  • Page 67 WARNING: Figure 3-27. Ascend arrow. Figure 3-28. Descend arrow The Poseidon SE7EN+ rebreather is in recreational mode not intended for use on planned decompression dives. Although In the unlikely event that a diver incurs a decompression obligation (i.e., the Decompression...
  • Page 68 Poseidon SE7EN User Manual Chapter 3 Page 58 Battery status indicator Ascent rate indicator Near the bottom of the Primary Display, just to The bar graph along the very top of the Primary the left of the Elapsed Dive Time value, is the Display indicates the diver’s current ascent...
  • Page 69 This might damage the solenoid valves and require their replacement at Poseidon Head Quarters. Therefore closing the cylinder valves during a dive is strongly discouraged unless necessary in an emergency situation.
  • Page 70 System monitoring Monitoring remaining dive time Merely understanding how to read and interpret the information presented on the Poseidon SE7EN+ Primary Display is only the first step. All divers must learn to monitor the Primary As mentioned previously, the Remaining Dive Time (RDT) value is based on several different Display and alarm systems regularly throughout the dive.
  • Page 71 Counterlung placement Counterlung strap adjustments When properly adjusted, the Poseidon SE7EN+ should rest easily on the diver’s back. It should Besides the three large straps for attachment to the harness, each counterlung has several not feel awkward or loose, but rather it should be reasonably snug and comfortable. Specific additional straps used to adjust positioning.
  • Page 72 In most cases, the water that collects inside the exhalation counter lung will not buoyancy control with closed-circuit rebreathers is beyond the scope of this Manual. However, disrupt the function of the Poseidon SE7EN+ in any way, so it can be safely ignored. However, the following tips might be useful.
  • Page 73 Now the complete system is powered down. while trying to maintain the set-point). Ending the dive After surfacing and exiting the water, the Poseidon SE7EN+ electronics will continue to function WARNING: indefinitely, ensuring a life-sustaining gas mixture is maintained in the breathing loop, until all...
  • Page 74 The default setpoint control algorithm is designed to allow for hands-off control of the system PO during all phases of a dive. The Poseidon SE7EN+ uses a proprietary method • ALWAYS remove the sponge from the top and bottom of the CO absorbent cartridge after that begins with a default control setpoint on the surface of 0.5 bar and gradually increases...
  • Page 75 Chapter 3 to shut the power down on the electronics system. Failure to do so will not cause any risk to the diver or the Poseidon SE7EN+ itself, but it will lead to unnecessary battery consumption, thereby requiring re-charging sooner than would other-...
  • Page 76 If the rebreather is not going to be used for extended periods (e.g., in excess of several weeks to remove the sponge from the Poseidon SE7EN+ backpack and squeeze as much water out or months), it’s important to disassemble and store the rebreather properly. The first step is to of it as possible.
  • Page 77 First-stage regulators should receive annual servicing, as needed. The open-circuit regulator built into the mouthpiece of the Poseidon SE7EN+ should be serviced by a qualified Poseidon Service Center prior to diving after an extended period of storage Before storing the rebreather for extended periods, it’s good practice to lubricate the user-...
  • Page 78 Poseidon SE7EN User Manual Chapter 4 Page 68 Whenever an oxygen sensor is changed, the serial number of the new sensor, and its position contact holes line up with the three pins on the galvanic sensor, and the two plastic pins on the (Primary or Secondary) should be logged.
  • Page 79 Ensuring that the entirely likely that Poseidon SE7EN+ owners will want to travel with their rebreathers to far-off electrical connector is still firmly attached, slide the sensor into the electronics module, with the destinations.
  • Page 80 Chapter 4 Page 70 Dive logs The Poseidon SE7EN+ automatically creates an extensive dive log every time the system is used for diving. If a M28 dive computer is connected, SE7EN+ log data is stored there as well. The information stored in this log will be of significant use to reconstruct dives and to learn about how the rig and you behave during a dive.
  • Page 81 (normally used as an ascent rate indicator) serves as a progress bar for the paring or using the Poseidon SE7EN for diving. It is divided into two main sections: The Auto- test routine; starting with all segments lit, then eliminating segments from right to left as the matic Pre-Dive Tests, and Hardware Issues.
  • Page 82 Poseidon SE7EN User Manual Appendix 1 Page 72 Technically, an error code of “1” means that the test passed successfully. However, this should never be displayed, because as soon as a test passes, the routine continues on to the next WARNING: test.
  • Page 83 Test 53 is the oxygen sensor calibration test and this is quite complicated and based on a lot C1 alarms on land of factors such as: When your Poseidon SE7EN has passed the Pre Dive check you should always set the mouth- - Temperature of the sensors piece DV switch to its Open Circuit (OC) position.
  • Page 84 When you descend and reach 6 m (20 swf) depth, the Discovey will do a Hyperoxic Linearity • Contact the dive center / dealer where you purchased your Poseidon SE7EN and e-mail test. The reason for the test is to make sure that the oxygen sensors can read PO2 values them the Red Box Log file(s) and dive log(s) you have downloaded from your SE7EN.
  • Page 85 1) Standard Response; 2) If test continues to fail, reset system parameters; Primary Display, which contains user-selectable configuration EEPROM 3) If test failure persists, contact an authorized Poseidon Service Center for information, for internal errors or data corruption. repair. HUD ROM / RAM / Fuses. This tests the RAM, ROM and fuse 4=Bad RAM 1) Standard Response;...
  • Page 86 1) Standard Response; 2) If test continues to fail, set RTC clock or reset in the battery processor, which contains user-selectable con- EEPROM system parameters; 3) If test failure persists, contact an authorized Poseidon figuration information, for internal errors or data corruption. 84=Battery missing Service Center for repair.
  • Page 87 1) Standard Response; 2) If test failure persists, or the Battery LED does not consumed by the green LED in the Head-Up Display (HUD), too low turn on during this test, contact an authorized Poseidon Service Center for when activated. 12=Current repair.
  • Page 88 1) Standard Response; 2) If test failure persists, or the Audio Alarm speaker trical current consumed by the speaker in the battery (Audio too low does not sound during this test, contact an authorized Poseidon Service Alarm), when activated. 12=Current Center for repair.
  • Page 89 1) Standard Response; 2) If test continues to fail, ensure loop temperature the temperature sensor embedded in the depth sensor is Suspect is within limits; 3) If test failure persists, contact an authorized Poseidon working correctly. Service Center for repair.
  • Page 90 3) If test continues to fail, try a different battery (subject to decompression this test will always fail. 87=Voltage too low data issues); 88= Voltage 4) If test failure persists, contact an authorized Poseidon Service Center for too high repair. 93=M28 battery state of charge insufficient Positive Pressure Loop Test.
  • Page 91 50=Valve Leaking 1) Ensure breathing loop is stable during test; 2) If test failure persists in spite 89=The mouth piece of a sealed and stable loop, contact an authorized Poseidon Service Center was moved from the for repair. OC position during the loop pressure test Mouthpiece Closed-Circuit Position.
  • Page 92 4) Ensure CO absorbent cartridge is 72=Primary installed correctly; 5) Ensure breathing loop temperature is within range O2 Low limits; 6) If test failure persist, contact an authorized Poseidon Service Center 73=Primary for repair. O2 High 76=Bad Time...
  • Page 93 3) If leaking persists, contact an authorized Poseidon Service Center or dive shop for on the electronics module, or from one of the high-pressure sensors.
  • Page 94 This is proven within the formal testing of - The Blue battery module allows decompression dives to 48m with normoxic trimix minimum the Poseidon SE7EN+ by an accredited laboratory. Conducting 16% oxygen content in the on board diluent gas.
  • Page 95 BCD / Harness / Regulators Attach the counterlungs to the shoulder straps of your BCD/Harness using the velcro straps The counterlungs on the Poseidon SE7EN+ are designed to attach to the backpack straps and on the back side of each counterlung.
  • Page 96 Poseidon SE7EN User Manual Appendix 2 Page 86 Rear CC hoses to counterlung Manual addition valves (MAV) T-connections. The additional ports on the counterlungs can be used for Oxygen and Diluent manual gas Connect the T-connection to the top port in each counterlung.
  • Page 97 Poseidon SE7EN User Manual Appendix 2 Page 87 Routing the inflator hoses Connect the O 2 inflator hose “marked O 2 ” to your onboard O 2 gas supply (or any other offboard source). Route the hose over your right shoulder and connect to the O 2 inflator valve though the quick connection.
  • Page 98 Poseidon SE7EN User Manual Appendix 2 Page 88 2 B. Assembly Back Mounted Counterlungs (BMCL) Back mounted counterlungs are designed to be mounted together with the back plate and wing. Left counterlung port Right counterlung port Blanking disc Blanking disc...
  • Page 99 Poseidon SE7EN User Manual Appendix 2 Page 89 T-connections. Mount manual addition to BMCL Connect the T-connection to the top port in each counterlung. Radial o-ring seal Thread connection post Radial seal surface Insert the right hand water diversion manifold into the port on the right WARNING: counterlung.
  • Page 100 Moreover, the blue Deco 48m Trimix battery module allows dives to a maximum of 48 meters and White Deco 60m Trimix to 60 meters. Using the 100m Deep battery the Poseidon SE7EN+ will accept any diluent mixture with an oxygen fraction equal to or higher than 1%.
  • Page 101 Poseidon SE7EN User Manual Appendix 2 Page 91 4. Pre-Dive Procedures with a Poseidon SE7EN+ enabled for Decompression Diving It is possible to determine whether a rig is configured for decompression diving by examining the ceiling indicator during the pre-dive routine. The ceiling indicator will be blank for a standard rig and be lit flash for a SE7EN+ enabled for decompression diving.
  • Page 102 Poseidon SE7EN User Manual Appendix 2 Page 92 6. Decompression Diving with the SE7EN+ A SE7EN+ enabled for decompression diving will behave differently compared to a SE7EN+ diluent is insufficient to reach the surface. When using a SE7EN+ enabled for decompression that is not configured for decompression diving.
  • Page 103 > Fit the Connecting cable between SE7EN+ and M28. Before the dive, make sure there is enough diluent (air) and oxygen to carry out the dive you plan to do. The EU version of the Poseidon SE7EN+ comes with a 3-liter / 183-cubic inch Loosen diluent (air) cylinder (with black valve knob).
  • Page 104 Poseidon SE7EN User Manual Appendix 3 Page 94 Absorbent Cartridge - Repackable Scrubber Intact Breathing Loop Verification Inspect all breathing-hose connections to ensure that they are properly attached. The attachment Follow the procedures described in Chapter 1 for the installation of the Repackable nuts should be hand tight and the nuts should be screwed down flush against the receiver Scrubber Cartridge, Sofnolime 797.
  • Page 105 Poseidon SE7EN User Manual Appendix 3 Page 95 Negative-Pressure Loop Test Before powering-up the electronics, it is important to check the integrity of the breathing loop. A positive-pressure loop test is conducted later on, as part of the normal power-up and auto- mated pre-dive test procedure.
  • Page 106 The M28 can be individually powered-up by a brief push at both buttons simultaneously (Figure 2-1), the SELECT command, a green LED vill become visible, followed by a Poseidon welcome ENTER screen and further to the “Dive app”. Select “Dive mode” and further select “Start SE7EN+”.
  • Page 107 Poseidon SE7EN+. You will see and hear the rig as it tests the HUD light and vibrator, and the battery lights and speaker systems. Similarly, you may also hear the rig opening and closing some of the gas control valves.
  • Page 108 (see Chapter 1). If the automatic pre-dive routine persistently fails any of these tests, contact a Poseidon Tech Center for assistance. In general, repeated failure of any one of these automated tests indi- Figure 2-6B.
  • Page 109 “NO” by pressing the appropriate button. NOTE: This test is not automatic and is intended authorized Poseidon Service Center. as a reminder for the diver. By confirming test 41, the diver acknowledges that he/she has installed a good canister prior to powering up the Poseidon SE7EN+. Figure 2-7. Test 43 Switch mouthpiece to OC...
  • Page 110 Poseidon SE7EN User Manual Appendix 3 Page 100 Oxygen and diluent cylinder supplies (Test 44 & 45) Tests 44 and 45 determine whether the Oxygen and Diluent cylinders, respectively, are turned on and have sufficient gas to conduct a dive. Following proper procedure, both cylinders will have been in the off position when Test 44 is reached (if not, gas will be wasted during Tests 24–27,...
  • Page 111 Like the Negative Pressure Loop test, this test could very easily be performed manually. However, one of the features of the Poseidon SE7EN+ – the placement of the depth sensor within the breathing loop – allows this test to be performed automatically (Figure 2-9).
  • Page 112 If no amount of reposi- tioning of the mouthpiece lever or HUD allows the system to pass Test 50, then contact an authorized Poseidon Service Center. Figure 2-11. Test 53 – Oxygen Sensor calibration.
  • Page 113 The final test (Test 55; Figure 2-12) is also the simplest. This test merely ensures that the rebreather unit does not require servicing. Each rebreather unit must be brought to a qualified Poseidon Service Center at least once every two years, to receive updates and make any the diluent and oxygen solenoids for 2 seconds necessary repairs or adjustments.
  • Page 114 Poseidon SE7EN User Manual Appendix 3 Page 104 Poseidon SE7EN+ Pre-dive checklist POSEIDON REBREATHER POSEIDON REBREATHER CHECK LIST PRE-DIVE CHECK LIST Check for damage, dirt and deteriorations Start up Procedure during assembly. CLOSE OPV, Check Mouthpiece rubber. OPEN-CIRCUIT mode. Check that the battery is charged.
  • Page 115 Appendix 3 - SE7EN+ connected to M28 Dive procedures HUD vibrator Perhaps the most important alarm signal on the Poseidon SE7EN+ is a customized version of the patented Juergensen Marine DIVA vibrator system, located in the HUD mounted on the mouthpiece.
  • Page 116 Poseidon SE7EN+ divers understand how to read the information contained in the Primary Display, particularly concerning various alarm conditions. Before even turning the Poseidon SE7EN+ electronics on, it is useful to understand the general layout of the Primary Display, and the logic behind how the information is organized. The display is arranged in different regions, each presenting different kinds of information.
  • Page 117 Failure to do so could lead to serious injury or death. When the Poseidon SE7EN+ electronics are started the display has the capability of showing many things but in the figure 3-3 the main symbols, icons and graphical elements are described in detail.
  • Page 118 What follows is a more detailed description of each of the screen elements, and what they mean. It is important that all Poseidon SE7EN+ divers become familiar with these symbols and values, what they mean, and how to respond when they are not displaying appropriate values (or are flashing).
  • Page 119 The current decompres- IMPORTANT: sion stop is displayed in a text message. It is the sole responsibility of each and every Poseidon SE7EN+ With the 40m recreational battery installed the diver to understand all of the alarm systems and conditions,...
  • Page 120 Poseidon SE7EN User Manual Appendix 3 Page 110 SE7EN disconnected alert As soon as the M28 detects the SE7EN E-module or other devices on the CAN-bus, such as Disconnection alarms can be acknowledged at any time. Acknowledging a disconnection the HUD or a CPOD, the M28 will begin to monitor their presence. If contact with a device is...
  • Page 121 PO2 < 0.30 bar. A high PO2 alarm will be triggered when PO2 > 1.6 bar for more than 60 seconds or immediately when PO2 > 1.8 bar. One of the important new features in the Poseidon SE7EN+ is the Hyperoxic Linearity test. When the oxygen sensors are calibrated during the pre-dive routine (Chapter 2), the linearity of the oxygen sensor response is only validated up to a PO value of 1.0 bar / atm (i.e., 100%...
  • Page 122 One of the most sophisticated features of the Directly to the right of the PO value the mouthpeice position is communicated: Poseidon SE7EN+ is the automatic oxygen • “CC” (mouthpiece is in the Closed Circuit position) sensor validation system, which monitors the •...
  • Page 123 Poseidon SE7EN User Manual Appendix 3 Page 113 Maximum depth / Ceiling The maximum depth achieved during the dive is displayed above the current depth, in the lower- IMPORTANT: left part of the Primary Display. Ceiling is shown in an information box center in the lower part of When the mouthpiece is in the “CC”...
  • Page 124 WARNING: Figure 3-27. Ascend arrow. Figure 3-28. Descend arrow The Poseidon SE7EN+ rebreather is in recreational mode not intended for use on planned decompression dives. Although In the unlikely event that a diver incurs a decompression obligation (i.e., the Decompression...
  • Page 125 Poseidon SE7EN User Manual Appendix 3 Page 115 Battery status indicator Cylinder pressure indicators At the upper right-hand corner of the screen the current state of charge for the M28 battery is displayed Along the sides of the M28 screen are the two cylinder pressure indicators, represented as bar together with an icon that visually reflects the M28 battery’s state of charge.
  • Page 126 In case your M28 shows an ABORT to Open Circuit you are mandated to follow the instruction valves and require their replacement at Poseidon Head Quarters. Therefore closing the cylinder and warning and go to OC by changing your mouthpeice position. The M28 will then automati- valves during a dive is strongly discouraged unless necessary in an emergency situation.
  • Page 127 Poseidon SE7EN User Manual Appendix 3 Page 117 Managing gases In the M28 there is a gas list of eight different gas configurations (Gas-1 to Gas-8) plus one If you by coincidence select a gas with a too high or too low PO2 at the existing depth the M28 Oxygen configuration (Oxygen-1).
  • Page 128 User Manual Appendix 3 Page 118 System monitoring Merely understanding how to read and interpret the information presented on the Poseidon Monitoring remaining dive time SE7EN+ Primary Display is only the first step. All divers must learn to monitor the Primary As mentioned previously, the Remaining Dive Time (RDT) value is based on several different Display and alarm systems regularly throughout the dive.
  • Page 129 Counterlung placement Counterlung strap adjustments When properly adjusted, the Poseidon SE7EN+ should rest easily on the diver’s back. It should Besides the three large straps for attachment to the harness, each counterlung has several not feel awkward or loose, but rather it should be reasonably snug and comfortable. Specific additional straps used to adjust positioning.
  • Page 130 In most cases, the water that collects inside the exhalation counter lung will not buoyancy control with closed-circuit rebreathers is beyond the scope of this Manual. However, disrupt the function of the Poseidon SE7EN+ in any way, so it can be safely ignored. However, the following tips might be useful.
  • Page 131 Now you need to turn off your M28 Dive Computer. Choose Settings/Power/Power off. Now the complete system is powered down. Ending the dive After surfacing and exiting the water, the Poseidon SE7EN+ electronics will continue to function WARNING: indefinitely, ensuring a life-sustaining gas mixture is maintained in the breathing loop, until all...
  • Page 132 PO during all phases of a dive. The Poseidon SE7EN+ uses a proprietary method new dive. that begins with a default control setpoint on the surface of 0.5 bar and gradually increases PO to a maximum automatic value of 1.2 bar at a depth of 15 m / 50 ft.
  • Page 133 SE7EN+ or when you connect any of the Select this option if you want to update the firmware in the CPOD. Poseidon products directly to the M28. Before any firmware can be updated the physical •...
  • Page 134 This is proven within the formal testing of - The Blue battery module allows decompression dives to 48m with normoxic trimix minimum the Poseidon SE7EN+ by an accredited laboratory. Conducting 16% oxygen content in the on board diluent gas.
  • Page 135 BCD / Harness / Regulators Attach the counterlungs to the shoulder straps of your BCD/Harness using the velcro straps The counterlungs on the Poseidon SE7EN+ are designed to attach to the backpack straps and on the back side of each counterlung.
  • Page 136 Poseidon SE7EN User Manual Appendix 3 Page 126 Rear CC hoses to counterlung Manual addition valves (MAV) T-connections. The additional ports on the counterlungs can be used for Oxygen and Diluent manual gas Connect the T-connection to the top port in each counterlung.
  • Page 137 Poseidon SE7EN User Manual Appendix 3 Page 127 Routing the inflator hoses Connect the O 2 inflator hose “marked O 2 ” to your onboard O 2 gas supply (or any other offboard source). Route the hose over your right shoulder and connect to the O 2 inflator valve though the quick connection.
  • Page 138 This tool can be downloaded from the Poseidon website, www.poseidon.com. and White Deco 60m Trimix to 60 meters. Using the 100m Deep battery the Poseidon SE7EN+ Alternatively the settings can be altered from the M28 computer through the system app and will accept any diluent mixture with an oxygen fraction equal to or higher than 1%.
  • Page 139 User Manual Appendix 3 Page 129 5. Switching batteries 4. Pre-Dive Procedures with a Poseidon SE7EN+ enabled for Decompression Diving It is possible to determine whether a rig is configured for decompression diving by examining As soon as a battery is inserted into SE7EN the SE7EN settings will updated according to the the ceiling indicator during the pre-dive routine.
  • Page 140 Poseidon SE7EN User Manual Appendix 3 Page 130 6. Decompression Diving with the SE7EN+ A SE7EN+ enabled for decompression diving will behave differently compared to a SE7EN+ diluent is insufficient to safely reach the surface in OC bailout mode. When using a SE7EN+ that is not configured for decompression diving.
  • Page 141 Poseidon SE7EN User Manual Appendix 3 Page 131 DANGER: DANGER: On a planned decompression dive, always check that the setpoint When the hyperoxic linearity test has not completed successfully, corresponds to the configured “deep” setpoint when reaching 15 do never add oxygen manually to raise the ppO2 above 1.0 bar at meter (50 feet) or deeper.
  • Page 142 Poseidon SE7EN User Manual Appendix 3 Page 132 7. Planning your dives with the M28 The Apps/Planner is a tool intended for a last-minute check just before the dive or for checking your next (repeated) dive at the dive site.
  • Page 143 Poseidon Diving Systems AB Beatrice Lesslies Gata 7, SE-421 31 Västra Frölunda, Sweden Phone: +46 31 734 29 00 E-mail: info@poseidon.com www.poseidon.com...