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NexSens Technology CB-450 User Manual

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CB-450 Data Buoy
User Guide
Last Revision: 20 October 2022
Date Generated: 7 December 2022
Copyright © 2022 NexSens Technology, Inc.

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Summary of Contents for NexSens Technology CB-450

  • Page 1 CB-450 Data Buoy User Guide Last Revision: 20 October 2022 Date Generated: 7 December 2022 Copyright © 2022 NexSens Technology, Inc.

  • Page 2: Table Of Contents

    Table of Contents 1. General CB-450 Data Buoy Overview Key Components and Definitions Key Specifications CB-Series Data Buoy Planning & Precautions 2. Buoy Assembly Using NexSens Electronics in CB-Series Data Buoys Data Loggers Battery Packs Installing User-Supplied Electronics in CB-Series Data Buoys...
  • Page 3 Connecting Mooring Hardware Deployment Single-Point Mooring Deployment Two-Point and Three-Point Mooring Deployment Planning a Medium-Deep Water Mooring for Small Data Buoys Mooring Line Length Calculation Chains for Controlled Movement vs. Ballast Weight System Maintenance Mooring Hardware Materials Deployment 4. Troubleshooting and Maintenance General Data Buoy Maintenance Verify Battery Voltage of a CB-Series Buoy Replace a Battery in a CB-Series Data Buoy...

  • Page 4: General

    Data Well – The waterproof compartment located in the center of the buoy hull for placement of system electronics such as batteries and data loggers. On the CB-450 model, the data well has a 10.3” (26.2 cm) diameter and 19.5″ (49.5 cm) height.
  • Page 5 For users supplying their own electronics, the CB-450 is delivered as an open platform with empty data well or with battery only. A data well top plate can be supplied in one of three ways: 1. A standard CB-PTL Pass Through Lid for passing of instrument cables through gland fittings 2.

  • Page 6: Key Specifications

    CB-450 buoy frame with instrument cage installed. Key Specifications The key specifications of the CB-450 buoy are given below: Hull Outer Diameter: 34.0” (86.4cm) Hull Height: 20.0” (50.8cm) Data Well Inner Diameter: 10.3” (26.2cm) Data Well Height: 19.5″ (49.5cm) Pass-Through Hole Diameter: 4.0″...

  • Page 7: Cb-Series Data Buoy Planning & Precautions

    CB-Series Data Buoy Planning & Precautions Buoy deployments are usually complex operations that involve many elements including sensors, data loggers, mounting hardware and mooring equipment. Careful planning is essential to the success of a buoy project, not only for system operation and data collection but also to ensure the project personnel’s safety and minimize the risk of damage to expensive system components.
  • Page 8 limited to, working on/near water and lifting of heavy equipment. Important factors to consider for personnel safety are: Use of safety equipment (i.e., life jackets, gloves, steel toed boots, etc.,) Proper lifting and mooring techniques Awareness of on-site and surrounding weather conditions and advisories Despite careful planning, unforeseen situations are always still a possibility.

  • Page 9: Buoy Assembly

    2. Buoy Assembly Using NexSens Electronics in CB-Series Data Buoys Although users may provide their own electrical components including data loggers, modems and batteries, many CB-Series data buoys are delivered as complete, plug-and-play system packages with a NexSens data logger as the central component of the system. Data Loggers NexSens offers four different data logging systems for buoy deployment, all of which are based on the central processing unit of the...

  • Page 10: Battery Packs

    CB-A05-4 CB-A01-2 CB-A05-1 CB-A05-2 CB-A05-3 CB-150 CB-250 CB-450 CB-650 CB-950 CB-1250 NexSens battery harnesses are typically shipped pre-installed in CB-Series data buoys. However, in cases where batteries need to be installed or replaced, detailed instructions can be found here.

  • Page 11: Installing User-Supplied Electronics In Cb-Series Data Buoys

    Installing User-Supplied Electronics in CB-Series Data Buoys NexSens CB-Series data buoys are flexible platforms that allow for use with both NexSens and user- supplied electronics. For those wishing to integrate their electronics, including batteries, data loggers, and modems, several accessories are available to facilitate installation inside the watertight data well located in the center of the buoy.

  • Page 12: Securing Data Well Plate

    Bulkhead cable assemblies – Ports on a CB-PTL may be interchanged with bulkhead cable assemblies for power, RF signals and sensor data cables. The following options are available: UW6-BULK – 6-pin power cables for connection of batteries, solar panels and regulator RF-BULK –...

  • Page 13: Cb-Ptl Bulkhead Connector Assembly Installation

    CB-PTL Bulkhead Connector Assembly Installation NexSens CB-Series buoy data wells capped with CB-PTL pass through lids may optionally have UW plug ports replaced with bulkhead cable connector assemblies. Connector Types The CB-PTL comes standard with a UW-6 power bulkhead cable assembly (UW6-BULK) pre-installed. Wiring instructions for connection of this cable to user-supplied electronics are available here.

  • Page 14: Power Bulkhead Connector Assembly Wiring

    UW-6 Power Bulkhead Connector Assembly Wiring CB-Series Buoys without NexSens integrated electronics will ship with a solar tower and pass-through plate outfitted with a UW-6 power bulkhead connector (UW6-BULK) port. Information regarding the port pinout and different options for wiring power to user-supplied electronics is supplied below. For installation instructions, follow the guide here.

  • Page 15: Wiring Options

    UW6-Bulk Pin # Molex Wire Color¹ Flying Lead Wire Color² Notes – – – – – Solar Connector Jumps to Pin 6 Black Black Yellow – Orange Solar Connector Jumps to Pin 3 ¹Molex connector is designed to interface with a NexSens CB-A01-2 or CB-A05-x battery harness. If this accessory was not ordered, connector can be cut off to wire to user-supplied components.

  • Page 16: M550 Beacon For Cb-Series Data Buoys

    NexSens CB-Series data buoys up to and including the CB-450. Depending on the configuration, it has a 1-3 nautical mile range and is normally delivered with flange mount hardware, yellow color and default 15 flash/minute pattern (Model M550-F-Y).

  • Page 17: Operation

    Operation The M550 is controlled using an IR programmer that is normally provided with the beacon. programming remote. The IR programmer can be used to perform the following functions: Turn beacon on and off Check the battery pack charge status Change the flash pattern Change the flash intensity...

  • Page 18: Cb-Series Data Buoy Instrument Cage Installation

    Model number CAGE is 39″ (99 cm) in length and is normally used with the CB-50, CB-150, CB-250 and CB-450 buoys. It is an optional accessory for the CB-50 and comes standard with the others. Model number CAGE-L is 44″ (112 cm) in length and has a wider profile. It comes standard with CB- 650, CB-950 and CB-1250 buoys.

  • Page 19: Cb-Cca Anti-Rotation Collar

    2. Tighten firmly with a pair of 1-1/8” wrenches such that the lock washer is flattened and the bolt hole is aligned with a notch on the castle nut. Secured cage. 3. Place the cotter pin through the bolt hole and bend the long leg of the pin. Cotter pin with bent leg for security.

  • Page 20: Use Of Sacrificial Anodes On Cb-Series Data Buoys

    Use of Sacrificial Anodes on CB-Series Data Buoys Sacrificial zinc anodes are recommended for use on CB-Series data buoys any time they will be used in saltwater environments. This helps to prevent corrosion on the stainless steel frame, as zinc is a more active metal that will be consumed while protecting the stainless steel.

  • Page 21: Cb-Series Data Buoy Instrument Mounts

    912M – 2″ diameter for use with CB-150 and CB-250 buoys 914M – 4″ diameter for use with CB-450 and CB-650 buoys 916M – 6″ diameter for use with CB-950 buoy 918M – 8″ diameter for use with CB-1250 buoy...
  • Page 22 918M-PO4 – 8″ diameter for use HydroCycle PO4 sensor on CB-1250 buoy Click for product information instructions for use. Miscellaneous Instrument Mounts – Mounting hardware for some commonly used sensors: Airmar SS510 Sonar Sensor Mount MC-600 Instrument Mooring Clamp Underwater PAR Sensor Mounting Arm YSI EXO Sonde Mooring Clamps Profiling Instrument Mounts –...

  • Page 23: Deployment

    Therefore, any top-side weight added above the water’s surface (e.g., sensors, sensor mounts) must be appropriately counterbalanced by ballast weight below the surface (e.g., instrument cage, chain, anchors, etc.). Before deploying a buoy system, some experimentation may be required to balance the system properly. Figure 1: NexSens CB-450 buoyancy diagram.

  • Page 24: Top-Side Weight

    Top-Side Weight Top-side weight is any weight mounted on the buoy above the water surface or the buoys’ center of gravity. Top-side weight located further from the buoys’ center of gravity will cause greater instability of the buoy. For example, suppose a weather sensor is mounted 36″ above the water surface (Figure 2). In that instance, the sensor mount will cause more buoy instability than mounted 24″...

  • Page 25: Ballast Weight

    Ballast Weight Ballast weight is any weight mounted on the buoy below the water surface or the buoys’ center of gravity. Contrary to top-side weight, a ballast weight added further below the surface (Figure 4) will provide a more significant stabilizing effect than the same size weight mounted closer to the surface (Figure 5).

  • Page 26: Buoy Ballast Weights

    The small model instrument cage (10 lbs.) is included with the purchase of CB-150, CB-250, & CB-450 buoy models and is an optional purchase for the CB-50. The large model instrument cage (26 lbs.) is included with the purchase of CB-650, CB-950, & CB-1250 buoy models. Typically, no additional ballast weight is necessary for the CB-25-SVS, CB-25, &...

  • Page 27: Mooring Data Buoys

    For first-time mooring designers, it is best to include an experienced marine engineer. NexSens Technology supplies mooring hardware to support user-designed systems but does not endorse any particular mooring strategy for any specific application and does not take responsibility for mooring performance or damage resulting from mooring failure.
  • Page 28 1. Catenary Moorings For shallow deployments with minimal wind, wave and current loading, most data buoys utilize catenary moorings. Shallow deployments can be designed with all chain or a combination of heavy bottom chain and light water column chain. Deeper water moorings may need to use a combination of chain and rope. Example catenary mooring deployment with single Example catenary mooring with combination of rope chain for shallow waters.
  • Page 29 Small-buoy catenary moorings Additional surface or subsurface floatation may be required for smaller buoyancy buoy applications where the floatation may not be adequate to support the mooring weight. Extra floatation can also free motion for wave measurement applications or offer additional resistance to horizontal loading. Example small-buoy catenary mooring with subsurface Example small-buoy catenary mooring with surface flotation.
  • Page 30 Horizontal Loading As wind, wave and current loads increase, the buoy is driven away from the anchor and mooring can be pulled taut resulting in the buoy listing to one side. Damage can result with topside equipment and solar panels becoming submerged. Additional surface or subsurface floatation may be required. Depiction of horizontal loading resulting Force diagram representing external forces acting on in buoy listing to one side.
  • Page 31 These moorings are useful for suspending sensor lines by pulling the mooring lines free and clear. Rough water, shifting bottom or horizontal loads can tangle two point moorings and lead to chafing and cable failure. Use this mooring type only in controlled and calm applications. CB-450 data buoy with semi-taut two-point mooring setup.
  • Page 32 3. Inverse-catenary (S-shape) moorings Inverse-catenary moorings are often referred to as S-shaped moorings. Floats and weights on the mooring lines create an S-shape, which provides spring action in the water column. Waves and water level changes are easily managed. This mooring type is most common on deep water deployments but has utility in shallow rough water applications.

  • Page 33: Cb-Series Data Buoy Deployment Tips

    CB-Series Data Buoy Deployment Tips NexSens Technology supplies mooring hardware to support user-designed systems but does not endorse any particular mooring strategy for any specific application and does not take responsibility for mooring performance or damage resulting from mooring failure.

  • Page 34: Deployment

    Shackle connections between the buoy tether line and Shackle connections between the anchor, chain, and marker buoy. water column line. Bow shackles must be properly connected and secured to prevent loosening, especially in rough water conditions. To attach a mooring line, remove the pin from the shackle and run it through the thimble of the mooring line (left image below).

  • Page 35: Single-Point Mooring Deployment

    system safely. Buoy systems are heavy, and personnel can quickly become entangled with mooring lines and anchors. Safety and flotation gear should be worn at all times when working on or near the water. Remember to perform a complete system test onshore before deployment. Learning the system’s nuances is better handled onshore or in a lab rather than in the field.

  • Page 36: Two-Point And Three-Point Mooring Deployment

    Single-point mooring system on CB-450 data buoy. Two-Point and Three-Point Mooring Deployment 1. Connect all mooring components inside the boat. Stage the components so that they can be lifted over the side of the boat and laid out without becoming entangled.

  • Page 37: Planning A Medium-Deep Water Mooring For Small Data Buoys

    By small data buoys, we are generally referring to CB-Series buoys up to and including the CB-450 model. While these are small and light enough to lift manually by 1-2 persons depending on the model, a medium-deep water mooring system will generally have a sizable anchor weight.
  • Page 38 Determination of mooring line length l While this is only a theoretical calculation which may vary in an actual deployment, especially depending on the physical properties of the mooring line, it can serve as a basis for determining the total mooring line length (also see Mooring Hardware Materials).
  • Page 39 Depiction of horizontal loading resulting Force diagram representing external forces acting on in buoy listing to one side. buoys in natural environments.
  • Page 40 A general principle is that the buoy should be allowed to move somewhat freely with waves and currents rather than attempting to firmly hold it in place at an exact point. How much drift radius can be tolerated must first be determined, and then the total mooring line length can be calculated.

  • Page 41: Chains For Controlled Movement Vs. Ballast Weight

    Chains for Controlled Movement vs. Ballast Weight One strategy to provide an adequate potential mooring line length but provide some limitation on the buoy’s free movement is to use a heavy bottom chain as a part of the mooring system. The idea of the heavy bottom chain is that it can be lifted up from the seafloor as the buoy is pushed away from its centerline during rough conditions, yet provide enough resistance to dampen this effect.

  • Page 43: System Maintenance

    System Maintenance A secondary consideration in calculation of mooring line length is serviceability of the instruments deployed. For practicality, it may be desirable to be able to access sensors mounted along the mooring line without having to lift the entire anchor system from its placement. This additionally helps to ensure that the buoy remains stationed at precisely the same location both before and after service.

  • Page 44: Deployment

    S-shaped mooring with weight applied to avoid mooring rope coming into contact with sensors. To connect mooring components together, various shackle types may be used. Here, it is important to consider the materials of construction. The internal frame of CB-Series buoys is constructed of Type 316 stainless steel.
  • Page 45 Buoy mooring hardware carefully arranged on deck to avoid tangling. 2. Use the crane to lift the heavy anchor and carefully lower it over the side of the vessel at the deployment site. Use the winch to hold the mooring rope such that the release is controlled throughout.
  • Page 46 3. After drawing the wire of the crane back to its original parked position, begin slowly paying out the mooring line using the winch. Before the anchor touches the seafloor, there is the possibility to make fine adjustments to the mooring location by carefully navigating the vessel, being sure to avoid tangling of the mooring line with the motor.

  • Page 47: Troubleshooting And Maintenance

    4. Troubleshooting and Maintenance General Data Buoy Maintenance The following practices should be carried out for general CB-Series data buoy maintenance during normal operation. As a general practice, measurement data should regularly be inspected, and Quick Alerts Alarms should be configured in WQData LIVE to detect any anomalies which may indicate that maintenance is required.
  • Page 48 3. If the buoy is deployed in saltwater, inspect the sacrificial zinc anodes and replace as needed. a. Replacement part number CB-ZA. NexSens CB-ZA Sacrificial Zinc Anode 4. Inspect sensor cables and calibrate instruments per manufacturer’s recommendations. a. Before disconnecting any sensor cables, it is recommended to remove power from the buoy by disconnecting the UW-6 pin plug from the SOLAR port on the data logger/data well lid.

  • Page 49: Verify Battery Voltage Of A Cb-Series Buoy

    Verify Battery Voltage of a CB-Series Buoy The battery voltage of a CB-Series data buoy can be measured using a DC volt/multimeter on the UW-6 (6-pin) SOLAR port on the data well top plate. This method works for both user-supplied battery systems with CB-PTL pass-through lid and NexSens-supplied CB-A01 and CB-A05 SLA battery systems.

  • Page 50: Replace A Battery In A Cb-Series Data Buoy

    2. Remove the buoy’s solar tower to gain access to the data well. a. For the CB-150, CB-250 and CB-450: Remove the (6) bolts and lock washers holding the solar tower to the buoy using a 9/16″ socket wrench.
  • Page 51 3. Remove the (8) bolts with lock washers from the buoy plate using a 9/16″ socket wrench. Remove lid to access the buoy data well. 4. Lift the buoy plate off of the data well. Disconnect the 6-pin UW-plug running between the solar regulator and the X2-CB and protect the connectors.

  • Page 52: New Battery Installation

    5. Remove the foam coverings to expose the battery harness. Top-view of the solar regulator and battery assembly with protective foam removed. 6. Remove the two nut, lock washer and flat washer pairs securing the regulator bracket to the battery mount posts (threaded rod).
  • Page 53 2. [Only for systems with 2 or more batteries] a. Discard any pre-installed hardware on the new battery terminals. Using the original battery terminal bolts and a 10mm socket wrench, tighten the ring terminal cables to the new battery. b. Make sure that the cables point toward the corners of the battery. Always insulate the detached cable leads to prevent short-circuiting the battery during installation.
  • Page 54 Hand-tighten solar regulator bracket to the top battery using original mounting hardware. e. Using a 9/16″ socket wrench, tighten down the regulator bracket until it is snug and the lock washers are flattened. Do not over-tighten as this may bow or crack the regulator bracket. f.
  • Page 55 UW-6 SOLAR port receptacle pinout for X2-CB data loggers and CB-PTL pass-through lids. 6. Connect the 6-pin solar panel plug to the buoy’s SOLAR port to reapply power to the data logger.

  • Page 56: Test A Cb-Series Buoy Solar Tower

    3. Record the DC voltage observed between Pins 2 (V+) and 3 (GND) of the solar tower’s UW-6 plug cable. Typical panel output in direct sunlight for all buoys is 18-22VDC. Measure between Pin 2 (V+) and Measuring DC Voltage on a CB-450 Pin 3 (GND) of the UW-6 plug. tower panel.
  • Page 57 CB-150 [10W] – between 0.37-0.46A b. CB-250 [15W] – between 0.59-0.72A c. CB-450 [15W] – between 0.59-0.72A d. CB-650 [32W] – between 1.36-1.67A e. CB-950 [46W] – between 2-2.4A f.

  • Page 58: Data Buoy Storage Requirements

    Data Buoy Storage Requirements The following practices should be carried out when storing a CB-Series buoy with an X2-CB data logger for an extended period of time: 1. Store the buoy in a dry environment that is kept above freezing. a.
  • Page 59 6. Top off the charge of the buoy batteries every 2-3 months by: a. Connecting a NexSens CB-Series Battery Float Charger Kit* b. Reconnecting the solar panel and moving the buoy outdoors into the sun.* NexSens CB-Series Battery Float Charger Kit *While charging, the data logger will be running.

  • Page 60: Warranty

    12 months from the date of delivery to the original customer. This warranty is limited to the replacement or repair of such defects, without charge, when the product is returned to NexSens Technology, Inc. Damage due to accidents, misuse, tampering, lack of reasonable care, loss of parts, failure to perform prescribed maintenance, or accidents of nature are not covered.

  • Page 61: Service Request

    6. Service Request Submit this form to request Return Authorization (RA). You will receive immediate email authorization receipt to print and include with your shipment. NexSens Return Authorization Date Shipped* 2022-12-07 Customer Name* Organization Equipment Return Address* Return Shipping Option* Prepaid &...
  • Page 62 Products within the warranty period will be fixed at no charge. Initial evaluations are performed at no cost and a quote will be provided if charges apply. Privacy Policy Your contact information will never be misused or shared with third parties. SUBMIT...

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