NexSens CB-50 Data Buoy User manual

CB50 DATA BUOY
QUICK START GUIDE
Overview
The CB-50 data buoy is designed for accomodating the
X2-SDL data logger, which is compatible with a multi-
tude of environmental sensors. The 5.5” ID center hole
can also house user-supplied electronics. A removable
topside foam tower supports solar marine lights and
protects electronics installed in the buoy frame. The buoy
has top-side lifting eyes and a subsurface mooring eye for
connection of single-point mooring systems.
What’s Included?
(1) Buoy hull
(3) Top-side lifting eyes
X2-SDL Installation
Loosen and remove the three top-facing eye nuts
and threaded rod assemblies.
a. Remove the top white plate.
Lift the top foam tower off of the buoy base.
IMPORTANT - BEFORE FIELD DEPLOYMENT: Completely configure and test the internal logging and telemetry of your
sensor or data logger. Confirm that the batteries will provide adequate power for the duration of the deployment.
Ensure that all external sensor ports and battery compartments have a watertight seal.
Figure 1: NexSens CB-50 Data Buoy
Important Specifications
Center Hole Dimension : 5.5” (13.97 cm) inside diameter.
Weight : 35 lbs. (15.87 kg) no payload; ~50 lbs. (22.68 kg)
with X2-SDL and solar marine light.
Buoyancy : 50 lbs. (22.68 kg).
Figure 2: Remove the top white plate.
Figure 3: Remove the top foam tower.

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Ballast Weight & Stability
An optional instrument cage mounted to the buoy
frame can help stabilize the buoy and provides a deeper
location for mounting additional weight. If needed, a
1/2” galvanized chain (~2.3 lb/ft) or other weight may
be added to the bottom of the cage or buoy frame. For
single-point mooring configurations, mooring chain and
lines connected to the bottom of the cage or frame may
provide adequate ballast.
a. For more information regarding top-side and ballast
weight, follow the link provided:
• nexsens.com/dbbwstab
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.
CB-50 Buoyancy
The upper float of the CB-50 should not be submerged
for extended periods of time. The SDL communication
bulkhead (outlined in red) should be oriented above
the water line (blue line) under normal deployment
conditions. Excess ballast weight may result in the
submersion of the SDL bulkhead and a subsequent
decline in both remote communication performace and
life of the data logger.
For additional information, please reference the CB-50 Resource Library on the NexSens Knowledge Base.
nexsens.com/cb50kb
Remove the orange exterior O-ring from the
bottom of the X2-SDL.
a. Insert the X2-SDL into the data well.
b. Push down until the top exterior orange
O-ring rests against the data well plate.
Re-install the foam top and white plate.
a. Secure them in place by inserting and
tightening the three top-facing threaded rod
assemblies.
Figure 4: Insert the X2-SDL into the buoy well.
Figure 5: CB-50 buoyancy diagram.