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Pressure test going to 0

HI guys,

I have been using bluerov2s for 2 years now and I experience for the first time a pressure test going to 0 bars on the main enclosure on one of our ROV.

We never had trouble before and just recently removed the newton gripper and replaced it with a tap. I double check all the joints, changed the dome, changed the enclosure, screwed and unscrewed the tap again and again and still the same result. I am going crazy…

I know it is almost impossible to give a diagnostic for this kind of problems but by any chance has anyone a good method to identify leaks? Could it be a problem with the tap itself that would not be sealed anymore?

Thanks for your help.

Do the inverse processus, add low positive air pressure ( no vacuum) and plunges it into a water tank full ( big sink) of water. You will see exactly where the leak is from. Make sure tho securise the battery enclosure to not open.

Hi,

Ok I will try that, thanks for the advice.

Cordialement,

Best regards,

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You could try pressurizing the enclosure by blowing into it, then spraying soapy water around the penetrators.

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Here’s something I rigged up - Since I made the video I’ve figured out I had the gain set too low on the gas meter, but I used it yesterday to find a leak and it worked.

hi,
I use an ultrasonic leak detector with vacuum and pressure and it locates the problem to the cm in seconds. not expensive really. some kits come with a dummy sonic load which you put in the BR2 and seal it up, no pressure needed and just use the wand to find the leak.
ricci

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Hi,

Thank you for the info, very interesting. Do you have any kit reference or supplier?

Cordialement,

Best regards,

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Try this if your in the US. Harder to get un Europe.

Ricci

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Hi,

Just to close this subject, we bought a INFICON but it did not help us to find the leak. We should have bought the ultrasonic emitor earlier, that we have now but we did not try it. After imerging the enclosure in the sink, we realized the bubbles were coming directly from a penetrator, actually the resin on our ping sonar popped out.

So we removed the ping and we resined from the inside all the penetrators with G-flex on our 2 ROVs and it worked.

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