Precision Measurement Engineering, Inc.

Discussing SCAMP Maintenance

INSPECTING THE O-RINGS

1. Be sure to CAREFULLY inspect the o-ring seals at each end of the SCAMP before closing. The velcro used for the battery pack tends to lose fuzz. This fuzz can find its way to the o-ring and break the seal allowing water to enter the SCAMP and damage it seriously.  The inside of the SCAMP tube should be wiped occasionally by pressing a balled-up paper towel through it to catch any velcro fuzz that the release endcap might pick up.
   
   
2. Wipe the o-ring carefully with a lint free towel.
   
   
3. Inspect the o-ring by gently rubbing it.  You are attempting to feel any scratches or cuts. After this, carefully inspect the o-ring surface and within the groove for foreign matter. If the o-ring seems old, then stretch it gently and visually inspect for cracks.
   
   
4. Replace the o-ring if any cuts or cracks are found. If replacing the sensor end o-ring, then slide it off/on over the SCAMP electronics with the covers on. Be careful not to nick it on the cover retaining screws.
   
   
5. Apply a thin coating of silicone oil,  grease or other o-ring lubricant designed for butyl nitrate type o-rings exposed to salt water.
   
   
6. Completely wipe the stainless steel sealing ring within each end of the SCAMP outer tube. Press a wadded up paper towel though this tube to capture any foreign materials (such as velcro fuzz).
   
   
7. Lubricate each sealing ring surface with a thin coating of lubricant.
   

Normal o-ring maintenance is complete. There are other o-rings located around the pressure transducer, below the I/O connector and a pair around the release screw shaft. These are not normally exposed and do not require routine maintenance.