nexsens CB-25-SVS Wave Buoy User Guide

: June 10, 2024
: NEXSENS

Table of Contents

Overview
What’s Included?
Important Specifications
References
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nexsens CB-25-SVS Wave Buoy User Guide

Overview

The CB-25-SVS wave buoy is constructed of an inner core of cross-linked polyethylene foam with a polyurea coating that provides 25 lb. buoyancy. Stainless steel plates on the top and bottom of the buoy provide topside lifting handles and subsurface mooring eyes for drifting, tethering, or mooring applications. The center hole accommodates the X2-SDLMC data logger, which includes internal batteries that are recharged by (3) 4-watt solar panels mounted on the top plate. The buoy accurately measures wave height, period, direction and more using SeaView Systems SVS-603HRi wave sensor.

What’s Included?

(1) Buoy hull, 25 lb. buoyancy
(1) Integrated SVS-603HR Wave Sensor
(1) Buoy tower
(3) 4-W solar panels
(3) 1.5” pass-through sensor pipes
(3) Top-side lifting handles
(3) Bottom-side mooring eyes
(1) 2ft. Bottom chain
(1) Instrument cage (Optional)

Important Specifications

Buoyancy: 25 lbs. (11.34 kg)
Weight: 30 lbs. (13.61 kg)
Center Hole Dimensions: 5.5” (13.97 cm) inside diameter; 11” (27.94 cm) tall

Instrument Cage Installation (Optional)

Use a Philips head screwdriver to remove the top white plate from the solar tower.
Use a Philips head screwdriver to remove the internal screws on the solar tower.
Use a Philips head screwdriver to remove the outside screws holding down the X2-SDLMC.
Use the provided bolt, lock washer and castle nut to attach the cage to the buoy frame.
a. Insert the bolt through the center hole within the buoy hull.
b. Place the black ballast washer between the cage and the bottom buoy plate.
Tighten firmly with a pair of 1-1/8” wrenches.
a. Ensure to flatten the lock washer and align the bolt hole with a notch on the castle nut.
Place the cotter pin through the bolt hole and bend the long leg of the pin.

Mooring Configurations
To develop an effective mooring strategy, a variety of application-specific criteria (water level fluctuations, currents and wave action, debris loads, etc.) must be thoroughly reviewed prior to deployment. NexSens does not endorse any particular mooring strategy for any specific application.
a. For more information on mooring configurations, follow the link provided:

Deployment
Warning: Always follow safe marine and boating practices. Heavy anchors, ballast weights, and chain require careful maneuvering. Small boats with limited lifting equipment and boat clutter can be unsafe. Care must be taken during deployment to maintain a clean and safe environment. Sacrificial zinc anodes should be used whenever a buoy is deployed in a saltwater environment to prevent corrosion. These zinc anodes must be inspected and replaced as needed

Ballast Weight & Stability
If a small NexSens cage (~10lbs.) is purchased, this will provide adequate ballast. No mooring apparatus should be connected to the bottom of the cage. Without a NexSens cage, galvanized chain can be utilized for ballast on the middle eyenut, keeping in mind the 25lbs. of buoyancy. The outside eye nuts should be utilized for tethering to another flotation device.
a. For more information regarding top-side and ballast weight, follow the link provided:

The buoy data well is not rated for submersion, so proper ballast weight is critical to ensure that the buoy does not overturn, including when the buoy is subjected to additional loading (e.g. high wind/waves, periodic snow/ ice loads, etc.).

Instruction