After installing a temperature sensor and repairing an issue of the laser, the software detected a leak. It was only a drop inside the main cabin. The sensor is firmly bonded with the rear plate. Underwater the left laser radiated the ray in a completely wrong direction fanned out.
I cleaned all sealing rings and lubricated them with new silicon grease.
During a new deployment, a leak has been detected in a depth of 2m. Inside the main cabin in the front, I saw ca. 20ml water. At home, I tried to find the leak with a leak detection spray, without success.
How can I locate the leak? I want to avoid to put the ROV underwater with overpressure. I suspect that the leak is in the laser. Can there be a connection via the laser to the main cabin? A connection is definitely between battery chamber and main cabin.
Hi @dr_stony -
I’m not sure what you’re referring to by the “laser” - but it is indeed possible for gas and liquids to travel between housings along cables. If you’re using any potted penetrators, these are a frequent source of leak failures as well.
This video shows how you can pressurize an enclosure to find leaks with super soapy water, it may help!
If you have blank penetrators, change them out with the normal penetrators one by one and do a vacuum test after each one. A little time consuming, but that’s how i manage to find some tricky leaks.
I’ve had one in a thruster cable twice, so it does not have to be in the penetrator itself.
I am very sure, that there was no impact. May be, the dome has been exposed to tension. It was exactly at the position of one of the tight screws. I could be caused by a material failure.
The vacuum test was ok. But -0.1 atmosphere is different to 5 m depth. Therefore, I do not wonder that I did not find the leak outside the water.
