POSEIDON SE7EN User Manual
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POSEIDON SE7EN User Manual

Connected to m28
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POSEIDON SE7EN
Appendix 3, version 1.2
SE7EN connected to M28

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Summary of Contents for POSEIDON SE7EN

  • Page 1 POSEIDON SE7EN Appendix 3, version 1.2 SE7EN connected to M28...

  • Page 2: Initial Pre-Dive Procedures

    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 bar / Loosen 2958 psi.

  • Page 3: Negative-Pressure Loop Test

    Poseidon SE7EN User Manual Appendix 3 Page 92 Absorbent Cartridge Negative-Pressure Loop Test Before powering-up the electronics, it is important to check the integrity of the breathing loop. Follow the procedures described in Chapter 1 for installation of a new SofnoDive ®...

  • Page 4: Electronics Power-Up

    On no choice after 30 seconds, it returns to the previous view. the open circuit bail out icon together with the unit serial number. Because the SE7EN and the M28 are designed to accept firmware updates, knowing the specific version number of the firmware is extremely important when diagnosing problems.

  • Page 5: Power-Up Self Test (Test 1 - 38)

    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 6 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 indicates a problem with the Poseidon SE7EN that will not be serviceable by the user. Figure 2-6B.
  • Page 7 Appendix 3 Page 96 Tissue tension (Test 40) As discussed in Chapter 1, the Poseidon SE7EN stores decompression data in two places: matic and is intended as a reminder for the diver. By confirming test 41, the diver acknowledges the battery, and the main backpack computer. This allows a diver to switch to a spare battery that he/she has installed a canister prior to powering up the Poseidon SE7EN.

  • Page 8: Oxygen And Diluent Cylinder Supplies (Test 44 & 45)

    Poseidon SE7EN User Manual Appendix 3 Page 97 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 9: Battery Power Verification (Test 48)

    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 10: Closed Circuit Mouthpiece Position (Test 50)

    If no amount of repositioning of the mouthpiece lever or HUD allows the system to pass Test 50, then contact an authorized Poseidon Service Center. Figure 2-11.

  • Page 11: Open Circuit Regulator Function (Test 54)

    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 information field will say “Service in X weeks”...
  • Page 12 Pre-dive checklist Cylinders OFF, CLOSE OPV, Check for damage, dirt and OPEN-CIRCUIT mode. deteriorations during assembly. Insert the battery. Check that the SE7EN battery and M28 O2__________%__________psi/bar Test 44, 45: turn cylinders ON. battery are charged. Diluent_________%__________psi/bar Test 50: CLOSED-CIRCUIT.

  • Page 13: Hud Vibrator

    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 14 The battery icon will reflect the lowest value of M28 battery or the SE7EN battery. If the M28 is detached from the SE7EN it will only indicate the M28 battery value.
  • Page 15 Question includes several user changeable instruments such as ascent rate, compass and other features. Planner When the Poseidon SE7EN electronics are started the display has the capability of showing many GPS fixed Exhortation things but in the figure 3-3 the main symbols, icons and graphical elements is described in detail.
  • Page 16 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 Figure 3-7.
  • Page 17 The General Alert symbol is a small icon that IMPORTANT: resembles a personal computer with a lightning It is the sole responsibility of each and every Poseidon SE7EN bolt on the screen. This symbol indicates that a diver to understand all of the alarm systems and conditions,...
  • Page 18 PO setpoint vill be displayed. Normally, this value will be the same as One of the important new features in the Poseidon SE7EN is the Hyperoxic Linearity test. the current PO , because the system will normally maintain the correct PO (i.e., Setpoint PO...

  • Page 19: Oxygen Sensor Confidence

    HUD. The latter case would arise if the HUD was sensor readings, based on several factors includ- unable to communicate reliably with the SE7EN or report that the mouthpeice is in both open ing primary sensor validation, dynamic response and closed position at the same time.

  • Page 20: Maximum Depth / Ceiling

    PO at whatever the PO of the current change in the SE7EN register list, see the part diluent is at the current depth, and decompression calculations “Changing settings in your SE7EN through the are based on the diver breathing the current diluent in open-circuit M28”...

  • Page 21: Remaining Dive Time (Rdt)

    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 22: Battery Life Indicator

    The full-scale (100%) value of each When the M28 computer is attached to the SE7EN the symbol incates which one of the M28 of these bar graphs is established through the config menu of the M28 computer.
  • Page 23 Changing settings in your SE7EN through the M28 Managing gases With the M28 its easy to alter the settings within the SE7EN unit meanwhile on land and con- nected to the SE7EN. Simply enter the system menu and select “Edit SE7EN reg”. Once Per predefault the selected OC gas will alwas be your SE7EN predefined diluent.

  • Page 24: System Monitoring

    The SE7EN is designed to make the task of monitor- The value can change even more dramatically (and suddenly) when the limit is based on ing these parameters as easy and straightforward as possible, and alarm systems have been remaining no-decompression time.

  • Page 25: Breathing Underwater

    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 26: Tips On Breathing

    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 27: Managing Ascents

    When the electronics shut down, the oxygen gas supply system is vented. If the cylinder valve is open, the system After surfacing and exiting the water, the Poseidon SE7EN electronics will continue to function will not properly vent. indefinitely, ensuring a life-sustaining gas mixture is maintained in the breathing loop, until the following four conditions have all been met: the depth is “0”;...

  • Page 28: Safe Diving With The Poseidon Se7En

    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 29: Update Se7En Firmware Through The M28

    “System” app. Once in the app press both buttons to access the system menu. Select firmware of the SE7EN from the M28. This might be a rarely used feature but a handy tool if “Force fw update”. You can now see a number of options, they are all listed and explained...
  • Page 30 DECO 40 / DECO TRIMIX 48 / DECO TRIMIX 60 / DEEP 100 1. Introduction The SE7EN can support decompression diving. To be able to perform decompression dives, you need two things: 1) the appropriate training, and 2) a decompression-enabled battery WARNING: module.

  • Page 31: Assembly Technical 60 M Counterlungs To Bcd / Harness / Regulators

    (Figure 1-16) attach the counterlungs to the shoulder straps of the backpack. The SE7EN is provided with a lower D-ring and a crotch strap that connect to the Connect the small male plastic clip on the upper part of the counterlung to the female plastic bottoms of each counterlung.

  • Page 32: Rear Cc Hoses To Counterlung

    Poseidon SE7EN User Manual Appendix 3 Page 121 Rear CC hoses to counterlung Manual addition 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 33: Routing The Inflator Hoses

    Poseidon SE7EN User Manual Appendix 3 Page 122 Routing the inflator hoses Connect the 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 34 Appendix 3 Page 123 3. Configuring the SE7EN for decompression diving The SE7EN can be set up differently for different types of dives through the PC configuration Moreover, the blue Deco 48m Trimix battery module allows dives to a maximum of 48 meters software tool.
  • Page 35 It is possible to determine whether a rig is configured for decompression diving by examining If a rig has been configured with a gas mixture other than air on a SE7EN using a 48m, 60m the ceiling indicator during the pre-dive routine. The ceiling indicator will be blank for a standard or a 100m battery, and then a 40m Deco battery or Recreational 40m battery is then inserted rig and be lit flash for a SE7EN enabled for decompression diving.

  • Page 36: Decompression Diving With The Se7En

    > 1 bar. (See chapter 3, hyperoxic linearity test in the Open-Circuit Bailout SE7EN manual). On a SE7EN that is not enabled for decompression diving, the system monitors the amount of gas remaining in the diluent cylinder, and warns the diver when the calculated amount of...

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