Hello everyone!
I had a message on QGC “leak detected”. However, the product has been already assembled, and it is on the ground! It didnt dive at all.
We have just closed the enclosure and the leak detected message keep coming. There is red light in the enclosure.
We have just calibrated the sensors, and then it started. Can you help me about it? Why is that happening and how i stop this issue.
Thanks!
Hi Sandy,
Please check that you do not have recently used absorption pads, we have found that pads a day or two old can have moisture present and give a false indication.
Please use new pads before every dive to eliminate this fault.
Also check that the connections on the PCB are secure, any unused ones are properly addressed.
Let us know how you get on.
Hi,
Is it blue robotics view that absorption pads should be replaced between dives?
That seems over conservative, especially if the bottles aren’t leaking.
On another note,
It’s quite difficult to neatly replace the absorption pads, as the sticky pads to hold the wires in place lose their stick.
Is there any product or method that anybody has found useful when replacing the pads?
Kieron
Hi @XYZEng,
No, this shouldn’t be necessary unless the pads are starting to get worn - if the enclosure is sealed and passing a vacuum test then it’s best to avoid opening it where possible, to reduce o-ring wear and the likelihood of causing leak points.
We do recommend using silica gel packets to absorb moisture from the air in the enclosure, which should help prevent errant readings from the leak sensor probes.
As with anything sticky it’s best to avoid fouling the surface where possible, especially with dirt or silicone grease. You may be able to replace the probe tips without detaching the probe wires from where they’re installed, but if not it should help to press the wires down quite firmly to reattach them, and if necessary you can put some glue on the sticky pad to make it stick better, or replace it with some other sticky pads or some double-sided tape.
I’d be curious whether isopropyl alcohol would temporarily reduce the stickiness of the pads, but that’s not something I’ve tried, so no guarantees it would help.