Oceanic/Aqualung transmitter flooded

[Jens Bölte]

Hi,

I had weird SAC readings today from one of my two Oceanic/Shearwater transmitter (no Swift yet), going from 0 to 5.2. Back home I checked the transmitter again and pressure was 20 bar higher than that of the second transmitter. I opened the battery case and found some drops of water in the battery case. I hope that I opened the battery case early enough to prevent corrosion.

Does anyone know the size of the o-ring?

Best wishes Jens

 

[scubadada]

Was it the O-ring or the pressure relief valve? Question - Pelagic Pressure Systems or Shearwater (the Swift) transmitter failures If it is an Oceanic transmitter, they will replace it for $120 Oceanic Services - Oceanic Worldwide Shearwater, I don't think so.

 

[Belzelbub]

Battery case o-ring is -016. But I doubt that will completely solve your problem as it seems that the pressure was reading incorrectly.

 

[Jens Bölte]

The transmitter reports sensible pressure readings now that the battery case is dry and I installed a new battery. Next week, I have a chance to pressure-check the transmitter and see whether it is leakproof.

What does -016 mean? I always thought that an o-ring specification consist of a specification for the diameter, the thickness, and the shore hardness (?).

Best wishes Jens

 

[Belzelbub]

The transmitter reports sensible pressure readings now that the battery case is dry and I installed a new battery. Next week, I have a chance to pressure-check the transmitter and see whether it is leakproof.

Interesting, and that's good news. I guess a low battery could give some strange readings, but I would have expected that you would have seen a battery level warning at some point.

What does -016 mean? I always thought that an o-ring specification consist of a specification for the diameter, the thickness, and the shore hardness (?).

-016 is short for AS568-016. Durometer is 70 for this application. You should be able to find the right o-ring using the AS568 number.

 

[Jens Bölte]

Hello,

I had the opportunity to check the pressure the transmitter reports with the pressure reported by a test bench over the range of 200 bar down to 20 bar. The transmitter worked over the whole testing range. Its pressure test (leak test) went smoothly.

Fortune favours fools