NexSens data buoys should be fully constructed onshore prior to deployment. Common accessories such as the tower, solar panels and additional ballast weight require user assembly.

Tower Assembly

Secure the buoy in an upright position. Keep the top of the buoy open and free for mounting accessories.

 

Pre-assembled MB-300 Data Buoy

Figure 1: Pre-assembled MB-300 Data Buoy

 

Mount the buoy tower using the supplied 1/2” hardware (screw, lock washer, and nut) as shown. Tighten until the lock washer is flat. Avoid over-tightening. Over-tightening the hinge bolt could result in deformation  of the hinge base, making it difficult to open and close the buoy tower.

Bolted connection between buoy and tower

Figure 2: Bolted Connection between buoy and tower

 

The tower is now hinged. When vertical, the tie-down bolts align with threaded holes on the buoy top plate.

 

Tie down bolts are tightened to keep buoy tower from hinging back

Figure 3: Tie down bolts are tightened to keep buoy tower from hinging back

 

Solar Power Pack Assembly

There are three cut-outs in the buoy for the solar packs. Insert each solar pack into a cut-out.

 

 

SP5 solar power pack installation

Figure 4: SP5 solar power pack installation

 

Position the output power cords (MS4 pin connector) over the center buoy well (as shown). These will be connected later to the harness that supplies power to the SDL500 data logger.

 

SP5 power packs MS4 connector positioning

Figure 5: SP5 power packs MS4 connector positioning

 

Use the supplied screws (5/16”-18 x 1/2”), washers, and lock washers to secure the solar packs to the top of the buoy. Be sure to tighten until the lock washers are flat.

 

Hardware is used to fasten the solar power packs to the buoy top plate

Figure 6: 5/16″ hardware is used to fasten the solar power packs to the buoy top plate

 

Loosen the tie-down bolts and confirm that the buoy tower opens and closes without hitting the solar panel.

Beacon Assembly

The top lid of the buoy tower includes the hardware necessary for mounting a beacon. Remove the screws, and position the beacon as shown. Use the supplied screws (1/4”-20 x 1 1/4”), lock washers, and washers to secure the beacon in place. Do not over-tighten the beacon mounting screws. The beacon deforms easily under screw loading.

 

Hardware is used to fasten the beacon to the buoy tower lid

Figure 7: 1/4″ hardware is used to fasten the beacon to the buoy tower lid

 

Use the supplied screws (1/4”-20 x 3/8”) to mount the buoy lid with beacon to the top of the tower.

Pre-deployment Test

Prior to deployment, it is essential to test the monitoring system (sensors, data logger and telemetry) onshore. This will allow users to familiarize themselves with the system and confirm proper operation.

Install and Power the Data Logger

Open the tower to the horizontal position and remove the two stop bolts near the bottom. This will allow the SDL500 to be inserted.

 

Stop bolts backed out to allow SDL500 access into tower

Figure 8: Stop bolts backed out to allow SDL500 access into tower

 

Position the SDL500 partially out of the tower and remove the bottom guard. Connect the power harness to port D and attach each of the MS4 connectors to the mating solar pack connectors (now located in the center buoy well). Be sure the guard is installed in-line, as it will be reconnected later.

 

SDL500 positioned slightly out of tower with guard removed and power harness connected to Port D

Figure 9: SDL500 positioned slightly out of tower with guard removed and power harness connected to port D.

 

 Connect Sensors

Connect sensors to the appropriate ports on the SDL500. Refer to the SDL500 operations manual for additional information.

 

SDL500 positioned slightly out of tower with sensors connected

Figure 10: SDL500 positioned slightly out of tower with sensors connected

 

Reconnect the guard to the SDL500 data logger.

The tower will remain open during this pre-deployment check, so sensor cables can simply hang over the side of the buoy.

Confirm Data Collection & Transmission

Launch iChart software and confirm that the SDL500 and sensors are communicating properly. Refer to the appropriate data logger manual and iChart software manual for additional information as required.

The pre-deployment check is complete. The buoy, data logger, and sensors can now be prepared for deployment.

 

REV: 13C09

 

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