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Dive Rite O2ptima User Manual

Closed circuit rebreather
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O
ptima Closed Circuit
2
Rebreather Manual

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Summary of Contents for Dive Rite O2ptima

  • Page 1 ptima Closed Circuit Rebreather Manual...
  • Page 2 O2PTIMA is equipped with redundant displays and control systems, which will allow a properly trained user to avoid these situations. It is the user’s responsibility to attentively monitor these systems when using the O2PTIMA and to have a working knowledge of the recovery procedures should a problem arise.

  • Page 3: Table Of Contents

    O2ptima Manual –User Guide – Page 3 of 26 Rev 1.1 __________________________________________________________________ Table of Contents 1. Preface ..................4 2. User Guide................. 6 2.1. Breathing Loop Assembly ..................6 2.2. Canister ........................7 2.3. Inhalation Side ..................... 11 2.4. Exhalation Side ....................13 2.5.

  • Page 4: Preface

    “tools” which can increase the diver’s comfort and ability during a wide range of diving activities. The purpose of this manual, however, is not to glorify the O2PTIMA (you already know how well designed it is, or you wouldn’t be reading this now). Rather, its purpose is to describe in detail the design and function of this sophisticated piece of diving equipment.
  • Page 5 This manual explains the O2PTIMA in great detail, but only you, the user, can control the outcome of your dives. Learn what the O2PTIMA can do to expand your capabilities underwater. Practice standard operational protocols until they become intuitive.

  • Page 6: User Guide

    Page 6 of 26 Rev 1.1 __________________________________________________________________ 2. User Guide The O2ptima CCR was designed to ensure assembly and disassembly of the unit is straightforward and simple. WARNING: THE FOLLOWING INSTRUCTIONS ARE ASSEMBLY INSTRUCTIONS ONLY. FURTHER TRAINING IS REQUIRED PRIOR TO USING THE UNIT.

  • Page 7: Canister

    O2ptima Manual –User Guide – Page 7 of 26 Rev 1.1 __________________________________________________________________ 2.2. Canister Canister assembly should be performed in a clean dry and well lit area. The canister consists of the following parts; • Head • Input cap • Center body •...
  • Page 8 O2ptima Manual –User Guide – Page 8 of 26 Rev 1.1 __________________________________________________________________ Scrubber cartridge o-ring 1. Screw in the three O2 cells into the Sensor Holder Disk. No cell should be placed in location 4 unless a stand alone computer is using this as an input. Remove the o- ring from the O2 cells if applicable.
  • Page 9 O2ptima Manual –User Guide – Page 9 of 26 Rev 1.1 __________________________________________________________________ 3. Plug-in the wiring harness into the banana jack block inside the head. Ensure that the colors match and that the ground for each cell is plugged into its appropriate spot.
  • Page 10 O2ptima Manual –User Guide – Page 10 of 26 Rev 1.1 __________________________________________________________________ 5. Remove the Extendair cartridge from packaging. 6. Remove the red cap from the Extendair cartridge. 7. Feed the O2 Premix rod through the center of the cartridge and secure with the thumb nut on the far side.

  • Page 11: Inhalation Side

    O2ptima Manual –User Guide – Page 11 of 26 Rev 1.1 __________________________________________________________________ 2.3. Inhalation Side The inhalation side comes over the divers left shoulder. It is comprised of 2 hoses (with red connectors), 1 Auto-Diluent valve and 1 counter lung with appropriate fittings. All the inhalation side threads are left handed threads and red in color.
  • Page 12 O2ptima Manual –User Guide – Page 12 of 26 Rev 1.1 __________________________________________________________________ 2. Attach the short breathing hose with red connectors to the ADV and the other end to the assembled canister. This hose has left handed threads and does not have a specific flow direction.

  • Page 13: Exhalation Side

    O2ptima Manual –User Guide – Page 13 of 26 Rev 1.1 __________________________________________________________________ 2.4. Exhalation Side The exhalation side comes over the divers’ right shoulder. It is comprised of 2 hoses (black connectors), 1 T-Piece and 1 counter lung with appropriate fittings.

  • Page 14: Dsv (Diver Supply Valve)

    O2ptima Manual –User Guide – Page 14 of 26 Rev 1.1 __________________________________________________________________ 2.5. DSV (Diver Supply Valve) The DSV does not typically need any assembly or disassembly. The DSV does contain two mushroom valves to provide flow direction. Both mushroom valves are removable for maintenance and cleaning (see the Maintenance section).

  • Page 15: Electronics

    Each handset is powered by a stand alone battery. The recommended battery for the O2Ptima is the Saft LS14500. The (+) plus side of the battery should be at the bottom of the battery compartment while the (-) negative side of the battery should be against the spring.

  • Page 16: Maintenance

    3. Maintenance To ensure many years of trouble free diving, it is critical that proper maintenance be performed on the O2ptima. Lack of maintenance can affect the proper functionality of the unit and will void any warranty. 3.1. Cleaning / Disinfecting All components which come into contact with the divers breathing loop must be routinely cleaned and disinfected (recommend Virkon be used as cleaning agent).

  • Page 17: Storage

    DISCONNECTED. 3.2. Storage If storing the O2ptima CCR for any extended period of time, store the unit in a clean and dry environment. All hose connections containing o-rings should be disassembled and the canister should be in a disassembled state. The batteries should be removed from the electronic handsets and the battery caps should remain off the handsets.

  • Page 18: O-Rings

    (9) o-rings and the breathing loop has sixteen (16) o-rings that need to be periodically inspected and replaced each year. The reason for such a high o-ring count in the O2ptima CCR is that the majority of fittings have double o-ring fittings.

  • Page 19: Solenoid Valve

    The O2ptima CCR has been designed is such a way that the user can easily replace the solenoid valve. 3.9. ADV (Auto-Diluent Valve) The ADV provides breathing loop gas upon demand by integrating a second stage regulator into the loop.

  • Page 20: Scrubber Medium

    __________________________________________________________________ 3.10. Scrubber Medium The O2ptima CCR has been designed to use Extendair cartridges manufactured by Micropore. The Extendair absorbent use the same chemistry as granular absorbents but they are formed into sheets that are rolled into easy to use cartridges.
  • Page 21 O2ptima Manual –User Guide – Page 21 of 26 Rev 1.1 __________________________________________________________________ 4. Unit Assembly Section 4 of the manual covers the overall assembly of the unit. Some of these steps are required to be done every dive while others are only done when first assembling the unit or when a complete down of the unit is required.
  • Page 22 O2ptima Manual –User Guide – Page 22 of 26 Rev 1.1 __________________________________________________________________ 2. Run the required hoses through the provided ports (see previous picture for front view). 3. Secure wing and Transpac or Tranplate to internal support bar using provide hardware.
  • Page 23 O2ptima Manual –User Guide – Page 23 of 26 Rev 1.1 __________________________________________________________________ Valve tabs 5. Insert canister and screw on the O2 inject hose. The O2 hose should only be finger tight. DO NOT OVERTIGHTEN O2 HOSE. Canister tie down...
  • Page 24 O2ptima Manual –User Guide – Page 24 of 26 Rev 1.1 __________________________________________________________________ 6. Install back lid 7. Install Breathing lungs. The upper harness has to loop under the lungs. Clip the top of the lungs with the provided clips. Upper lung clips...
  • Page 25 O2ptima Manual –User Guide – Page 25 of 26 Rev 1.1 __________________________________________________________________ 8. Install remainder of the breathing loop as per directions from Section 2. Proprietary Information - Not to be released without written authorization Asseer & Associates, 5609 Power Road, Ottawa, Ontario, K1G 3N4...

  • Page 26: Troubleshooting

    O2ptima Manual –User Guide – Page 26 of 26 Rev 1.1 __________________________________________________________________ Troubleshooting Issue / Problem Solution • Ensure all fittings are secured. Positive and/or negative pressure tests can • Ensure DSV is fully closed. not be preformed • Ensure over pressurization valve is fully closed.
  • Page 27 Optima HammerHead Electronics Instruction Manual The Hammerhead, also has handsets called the primary and secondary, but each has different purpose and functions. The primary is responsible for maintaining the selected set-point, displaying the measured PO for the three main oxygen sensors, time, depth and decompression information.
  • Page 28 Normal display Primary Handset Set-Point #1 Set-Point #2 Changed Version 4.5 Version 4.5 or Greater Set-Point #3 User Defined Values Set-Point #4 User Entry Updated / User GF Factors Set-Point #5 CLOSED CIRCUIT OPEN CIRCUIT DEFINE GAS CONSERVATISM CUSTOM GRADIENT GF-HI GF LOW DEFINE SET POINT...
  • Page 29 Normal display Secondary Handset Set-Point #1 Set-Point #2 User Defined Values Set-Point #3 User Entry Set-Point #4 Set-Point #5 DEFINE SET POINT BACKLIGHT TIMER 2 – 30 Seconds AUTO SHUTDN RATE 2 to 30 minutes CALIBRATE O2 MV DISPLAY Erase Flash Test Flash Test Watchdog DIAGNOSTICS...
  • Page 30 System Overview Before being able to dive the unit, it is necessary to understand a few basic conventions used by the controllers, calibrate the oxygen sensors and set diver preferences. Initially out of the factory, some common set-points are defined, all gas mixes are programmed to AIR, and sea level is set at approximately 1840 ft above sea level.
  • Page 31 The other unique feature pertaining to set-point maintenance is the algorithm used to hold the selected set-point. Each manufacture comes up with their own unique formula to determine when oxygen is injected; the user generally has no control over this function.
  • Page 32 Juergensen’s Threat Matrix Diver forgets to turn on unit: Answer: Wet Switches Wet Switches Fail: Answer: Pressure Transducer will activate unit at 1m pressure Diver sets unit to Open Circuit, but is still breathing the loop. Answer: Solenoid Override at 0.19 PO Diver sets unit to Manual Control, but forgets to add O2: Answer: Solenoid Override at 0.19 PO Diver ignores Primary and Secondary Display:...
  • Page 33 ALARMS START Primary READ Green Flashing LED Red Flashing LED AVERAGE FLASHING PO2 >= 1.8 PO2 <=.19 FLASHING BACKLIGHT BACKLIGHT FIRE SOLENOID SYSTEM OK START Secondary READ <PO2! ERROR!> DIVA Green LED DIVA VIBRATING Check Every 8 seconds PO2 >= 1.8 <...
  • Page 34 Handset Display Details The Primary handset has several informational screens that vary depending on whether the unit is in surface mode, no deco obligation, or deco required conditions. This is the surface mode screen; the top line consists of the surface interval, selected set-point or open circuit indicator, maximum depth of previous dive, and finally dive time.
  • Page 35 line. This should help insure the diver doesn’t try and use a nitrogen mix with same oxygen percentage as a helium based gas Set-Point Operation One of the main features of the hammerhead is the ability for the diver to select a new set-point based on a user programmed set of five choices.
  • Page 36 measurements for each sensor. Any individual sensor out of range will be voted out. The voting logic used in both the primary and secondary handsets is identical. Any sensor that is 15% out of range from the average of the remaining two sensors will be voted out. The second, third and fourth screenshots show sensor one voted out.
  • Page 37 The next option allows the diver to put the handset in either open circuit or close circuit mode. In open circuit mode, solenoid control is disabled, unless the PO falls to 0.19Ata. This function serves two purposes. The first NEXT SELECT allows the diver to bail onto open circuit and still have decompression obligations calculated.
  • Page 38 The next option is setting the level of conservatism for the decompression model. The original software has eleven levels of conservatism, setting “1” being the least conservative and setting “11” being the Conservatism NEXT SELECT most conservative. The GF-low and GF-high limits are decreased equally with increasing level of conservatism forcing deeper stop depths and lower allowed limits of inert gas loading.
  • Page 39 sites. Gradient factors is a method used to control the shape of the decompression profile. in a consistent manner. There are two parameters GF-Low and GF-High. The first parameter determines where the initial stop begins. The second parameter determines the maximal allowing tissue loading upon surfacing.
  • Page 40 decompression obligation. NO conservatism setting or decompression plan can guarantee ZERO risk of decompression sickness! The next option allows the entry of the custom gradient discussed in the previous section. The first value entered is the GF-High, followed by the GF-Low setting. Custom Gradient Custom Gradient Custom Gradient...
  • Page 41 unit from remaining on. Let the unit sit for at least FIVE minutes. This allows time for any inert gas remaining in the loop to mix. Top with oxygen if any volume from the loop is lost and go to the “MV display” screen again. If the sensor values have decreased, the flush was incomplete so flush again and repeat.
  • Page 42 The Imperial – Metric setting selects system of units that will be used for displaying depth on the current hardware revision; future hardware upgrades will add temperature measurement. The current Imperial—Metric NEXT SELECT selected units will be displayed, pressing the LEFT button will toggle and RIGHT will select.
  • Page 43 better setting. In shallow water, a low value will hold a stable set-point with little or no overshooting, but as depth increases, an overshoot is probable. An error setting of 5% works well over a wide range of depths with acceptable results for most divers. The general rule of thumb is as depth increases;...
  • Page 44 O2ptima Pre Dive Check List Name: _________________________________ Date of dive: ____/____/____ Rig ID: ______________ Sensor S/N: (1) _____________ (2) ______________ (3) _______________ BATTERY PRIMARY SECONDARY DATA: DATE INSTALLED Table 1 Dive start time: _________ Stop time: _________ Initials Note: Initial only when task has been performed.
  • Page 45 O2ptima Post Dive Check List Date of -dive: ____/____/____ Dive start time: _________ Stop time: _________ Initials Note: Initial only when task has been performed. ____ 1. Rinse CCR in fresh water. ____ 2. Record cylinder pressures O , ______PSI/BAR Diluent: ______ PSI/BAR ____ 3.

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