gopbroek
Contributor
Recently I picked up a used a Sherwood Wisdom (DOM 08/06) with a quick disconnect. I was very happy with it until in the middle of my second trip to CZM (about 20 dives with the unit) while on the way to the dive site I pulled out my computer and discovered the displayed pressure had locked up and was displaying 2800 PSI while unattached to a bottle. I was able to switch to an analog SPG and use a barrowed computer to finish the dive trip.
Over the next 2 months I watched the pressure slowly bleed off to about 1500 PSI. I then started to suspect that the quick disconnect port had been fouled by a contaminate and caused a blockage within the computer near the pressure sensor. I had not been capping either end of quick disconnect when I would remove the unit at the end of each day so it could be anything from salt to lint to a bug from the hotel room.
With nothing to lose I inverted it and put a couple drops isopropyl alcohol down the fitting and let it sit. This morning, a month later I was attaching an analog console to my regulator and remembered the dead Wisdom and hooked it to a bottle to see if it cleared, it has and it now works fine. I plan to run it in parallel with the analog console and use a separate computer on my next trip to see if it remains cleared.
Has anyone else heard of blockages or contamination (or any other malfunction) causing a Sherwood Wisdom (or any other AI computer) to lock to a false high pressure reading? In the middle of a dive this could be a bad thing.
Over the next 2 months I watched the pressure slowly bleed off to about 1500 PSI. I then started to suspect that the quick disconnect port had been fouled by a contaminate and caused a blockage within the computer near the pressure sensor. I had not been capping either end of quick disconnect when I would remove the unit at the end of each day so it could be anything from salt to lint to a bug from the hotel room.
With nothing to lose I inverted it and put a couple drops isopropyl alcohol down the fitting and let it sit. This morning, a month later I was attaching an analog console to my regulator and remembered the dead Wisdom and hooked it to a bottle to see if it cleared, it has and it now works fine. I plan to run it in parallel with the analog console and use a separate computer on my next trip to see if it remains cleared.
Has anyone else heard of blockages or contamination (or any other malfunction) causing a Sherwood Wisdom (or any other AI computer) to lock to a false high pressure reading? In the middle of a dive this could be a bad thing.
