Prevent Pressure Build-Up in CB-Series Data Wells
Due to temperature and barometric pressure changes, or in some cases, battery off-gassing, buoys with sealed compartments, including battery and data wells, can build up pressure or establish a vacuum over time. To reduce these effects, NexSens CB-Series buoy lids are equipped with either a membrane vent or, for rough water applications, a 5 PSI pressure relief valve. The membrane vent is better at equalizing the data well with atmospheric pressure; however, the downside is that it has a higher leakage potential if submerged in rough waters. Water intrusion into the battery well can cause significant issues, including battery failure and increased off-gassing.
If a user is utilizing their electronics and data well lid, NexSens highly recommends using a pressure relief valve that is rated either equal to or less than 5 PSI. Higher PSI ranges (>5 PSI) may not be adequate to equalize with atmospheric pressure or prevent off-gassing build-up. Regular cleaning and inspection of the vent are required to avoid blockages.
Safely Opening the Battery Well
When opening the battery well, NexSens recommends the following:
- Do not use power tools, grinders or other equipment that could spark until the air has been removed and the compartment is in equilibrium with atmospheric pressure.
- Loosen all bolts manually (9/16″ socket wrench) to approximately a one-half turn to allow the pressure to equalize.
- Follow the pattern outlined below to apply even pressure to the lid.