NexSens CB-1250 Data Buoy User manual

CB-1250 DATA BUOY
QUICK START GUIDE
Overview
The CB-1250 data buoy is constructed of an inner core of
cross-linked polyethylene foam with a polyurea coating
that provides 1250 lb. buoyancy. A stainless steel internal
frame provides topside lifting eyes and subsurface
mooring eyes for single- and multi-point mooring. An
integrated data well accommodates internal batteries,
which are recharged by (3) 71-watt solar panels mounted
on the buoy tower. The data well lid is available as a
NexSens X2-CB buoy-mounted data logger or as a
standard lid with included pass-through fittings.
What’s Included?
(1) Buoy hull with data well, 1250 lb. buoyancy
(1) Buoy tower
(3) 71W solar panels
(1) Data well lid (X2-CB or pass-through)
(3) 8” pass-through sensor pipes
(3) Top-side lifting eyes
(3) Bottom-side mooring eyes
(1) Cage-L Instrument cage
(1) CB-CCA anti-rotation cage clamp
Instrument Cage Installation
Follow the included CB-CCA quick start guide to attach
the instrument cage to the buoy frame.
Important Specifications
Buoyancy : 1250 lbs. (567 kg)
Weight : 300 lbs. (136 kg)
Data Well Dimensions : 10.3” (26.16 cm) inside diameter;
27.5” (69.9 cm) tall
Figure 1: NexSens CB-1250 Data Buoy
Remove the included clevis pins from the (3)
tower mount hubs.
Solar Tower Connection
Insert the tower legs into the tower mount hubs.
Re-install the clevis pins to secure the solar tower.
a. It is recommended to apply a zip tie through
the loop closure for added security.
Figure 2: Clevis pin removal.
Figure 3: Solar tower connection.
Figure 4: Installed tower.

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Fairborn, Ohio 45324
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:
• nexsens.com/mooringdb
Safe 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.
Ballast Weight & Stability
To prevent overturning of a CB-1250 buoy system and
to ensure that it is stable in the water, additional ballast
weight may be needed. The buoy’s center of gravity is
near the water surface without instruments connected.
Any weight added above the water surface must be
appropriately counterbalanced by adding ballast weight
below the surface.
a. For more information regarding top-side and ballast
weight, follow the link provided:
• nexsens.com/dbbwstab
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.).
Figure 5: CB-1250 buoyancy diagram.
Saltwater Deployment
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.
For additional information, please reference the CB-1250 resource library on the NexSens Knowledge Base.
nexsens.com/cb1250kb