1. O2 PTIMA E LECTRONICS AND THE S HEARWATER P ETREL Jim Wyatt There may be some places in this manual that state a PO2 of 1.3 ata is acceptable. Be aware that a PO2 of 1.2 ata is the maximum PO2 that IANTD standards allow.

2. This is the Electronics Package Jim Wyatt-November 2015

3. Note the o-ring. You must be sure this o-ring is in the scrubber cannister to prevent CO2 breakthrough. Jim Wyatt-November 2015

4. This holder is for the 9 Volt battery for operating the solenoid. (SOLO) Care must be given so as to not allow water to enter the housing during battery changes. The polarity marker for the + side is shown. Replace this battery once it drops to 7.5 volts. Jim Wyatt-November 2015

5. This holder is for the AA battery for the Heads Up Display (OBOE Board). Polarity is indicated on the outside of the housing. Be careful to allow no water into the housing when changing batteries. The HUD calibration data is stored inside this holder on the OBOE Board. Jim Wyatt-November 2015

6. This is the head. All four oxygen cells and solenoid are shown. Jim Wyatt-November 2015

7. Cell carriage removed. Wires from the O2 cells are color coded to match the terminal block shown on the next slide. Jim Wyatt-November 2015

8. The colored wires come from the molex connections on the oxygen cells. These are banana type connectors. The yellow wire is signal input to the solenoid telling it to open when energized.

9. Jim Wyatt-November 2015

13. Shearwater Petrel Jim Wyatt-November 2015 Download the Shearwater Petrel Users Manual https://d2uy6nbe9j4vef.cloudfront.net/wp- content/uploads/2012/08/PetrelManual_DocRevD.pdf

14. DiveCan Jim Wyatt-November 2015 SOLO is Solenoid and Oxygen electronics. OBOE is Oxygen Board electronics

15. Shearwater Petrel Jim Wyatt-November 2015 The following slides highlight three screen views for the Shearwater Petrel as used on the O2ptima CCR. Each user should download, read and understand the entire manual prior to usage.

16. Jim Wyatt-November 2015

19. O2ptima HUD reads: Sensor 1 (Shared by Petrel) Sensor 2 (Shared by Petrel) Sensor 3H (HUD only) PPO2 reading The Petrel reads 3 sensors: Sensor 1 Sensor 2 Sensor 3C (Controller) Jim Wyatt-November 2015

20. The following two slides are an example of a simple O2ptima rebreather dive. In the Shearwater Predator manual is also an example of a complex rebreather dive that includes multiple gasses and a bailout scenario. Users are encouraged to read and understand the screens for the complex dive as well. However please note, this is beyond the scope of the entry level air diluent class.

21. Jim Wyatt-November 2015

31. The setpoint should be no higher than 1.2 according to IANTD standards.

32. Jim Wyatt-November 2015

35. Mode is not changeable. Salinity is changeable. Low and High SP are changeable but we will leave them as shown for this class.

36. Jim Wyatt-November 2015 Conservatism (GF) is editable. Users must understand Gradient Factors prior to changing. Last Stop is editable between 20 & 10 feet. Always leave at 10 feet. Consider the oxygen clock. NDL Display is editable. GF99 is based on the current supersaturation %

37. Jim Wyatt-November 2015 These are your bailout gasses. More advanced dives particularly deep trimix dives may involve more than one bailout gas. We will use either Air or Nitrox for our bailout gasses.

38. Jim Wyatt-November 2015 Closed Circuit gasses may change if, for example we use a helium based mix. We will always use Air as our CC/Diluent gas for this class.

39. Jim Wyatt-November 2015 Rarely will Cal FO2 be anything other than 0.98 Sensor display is editable between Large and Huge

40. Jim Wyatt-November 2015

41. There are several options in the Edit Advanced Configuration screen. Such as colors, battery icon display, end dive timer, and gas selection menu type. There are other menu items also.

42. Download the Shearwater HUD User Manual http://www.diverite.com/downloads/diverite_272.PDF Jim Wyatt-November 2015 The following slides highlight the most commonly used options for the Shearwater HUD as used on the O2ptima CCR. Each user should download, read and understand the entire manual prior to usage.

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46. PO2 is displayed in ATA with a resolution of 0.1 ata/bar. There are four rows of LED’s Jim Wyatt-November 2015

51. Modular design compartmentalizes critical functions for redundancy Example: The solenoid and Oxygen electronics (SOLO) can measure and inject oxygen independently of the handset. During the dive and only during the dive if the handset is unplugged or damaged, the SOLO will continue to control loop PO 2 Jim Wyatt-November 2015