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Preventive maintenance for wireless transmitter?

Discussion in 'Shearwater Research' started by BoatingDave, Jan 30, 2019.

  1. BoatingDave

    BoatingDave Angel Fish

    # of Dives: 25 - 49
    Location: Philadelphia, Pennsylvania
    44
    3
    8
    So is there any recommendation for changing battery compartment o-rings? Lubrication of rings with silicon, etc.? Every 6 months? More often with use?
     
  2. rsingler

    rsingler Scuba Instructor, Tinkerer in Brass ScubaBoard Sponsor

    # of Dives: 500 - 999
    Location: Napa, California
    2,639
    2,893
    113
    Since it's a static oring, there is no need to replace the oring before the battery is due to be changed. Repeated dives do not increase the chance of failure within the lifetimes of any current battery.
    Reusing the oring is slightly more risky, and most favor a lightly lubed (silicone or Christolube) replacement with every battery, rather than trying to reuse them. But current Viton or EPDM orings have very long lifetimes, so it's really the risk of damage during repeated handling that makes most divers put in a new one with each battery.
    It's possible for the oring to take a "set", and be less likely to seal the second time due to distortion, but this is more theoretical than real, as some manufacturers allow 3-year service intervals on regulators with orings subject to 3500 psi pressure. Battery compartments shouldn't see more than a brief 75 psi for recreational diving.
     
    fmerkel likes this.
  3. Cleavitt

    Cleavitt Nassau Grouper

    # of Dives: 500 - 999
    Location: Central Florida
    116
    25
    28
    I own 5 of these same transmitters from various computers I bought over the years. Most of them are several years old. One is 12 years old and it's been on several hundred dives now. I have never replaced the battery compartment o-rings on any of them that I remember. None have ever flooded even on deep Trimix dives. Batteries last roughly a couple of years unless I leave a tank valve open or forget to purge the reg to release the pressure while it sits in my garage for a few weeks. They are probably one of the few nearly maintenance free bits of dive gear that I own.
     
    Jay and rsingler like this.

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