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Perdix AI showing depth 0.0m when still below surface

Discussion in 'Shearwater Research' started by Divectionist, Feb 22, 2019.

  1. Divectionist

    Divectionist Nassau Grouper

    # of Dives: I just don't log dives
    Location: Gold Coast, Australia
    197
    89
    28
    Hi

    On the last dive of the day I noticed that the depth reading on my computer was already at 0.0m when I was still more than 1.5m below the surface with my head, and at least 2m below at raised wrist level.

    Dive was in calm ocean water and the computer is set to salt. Reading was taken on a very slow ascent from the safety stop.

    I assume the sensors would be calibrated to EN13319 accuracy. Does anyone else get similar results in practice? Is it a shallow phenomenon with a reduced error at depth?

    Thank you
     
  2. guruboy

    guruboy Divemaster ScubaBoard Supporter

    4,575
    709
    113
    is your altitude setting correct?
     
  3. Divectionist

    Divectionist Nassau Grouper

    # of Dives: I just don't log dives
    Location: Gold Coast, Australia
    197
    89
    28
    Set to Auto (not adjustable in oc rec)
     
  4. SammyW

    SammyW Angel Fish

    # of Dives: 200 - 499
    Location: Derbyshire, UK
    49
    20
    8
    i get this all the time when shallow diving <1.5m

    I find that physically lowering your arm usually jolts the computer into noticing you are still underwater.
     
  5. rsingler

    rsingler Scuba Instructor, Tinkerer in Brass ScubaBoard Sponsor

    # of Dives: 500 - 999
    Location: Napa, California
    2,625
    2,887
    113
    I'll check mine this weekend
     
  6. lermontov

    lermontov Manta Ray

    # of Dives: 500 - 999
    Location: christchurch
    708
    266
    63
    ..and more importantly does it count as a dive?
     
  7. Kharon

    Kharon Solo Diver

    # of Dives: 200 - 499
    Location: Upstate NY
    3,586
    2,683
    113
    Don't have a Perdix, but most computers I've used consider the dive over when you reach about 4'-5' unless you again submerge to the trigger depth within a set time. My guess is that is what you are seeing.
     
  8. Divectionist

    Divectionist Nassau Grouper

    # of Dives: I just don't log dives
    Location: Gold Coast, Australia
    197
    89
    28
    how did you go?
     

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