Hyd/Met Station at Gothenburg Harbour, Sweden - Case Study

This delivered system consists of meteorological and hydrologic sensors and data logging equipment for measuring parameters that are of importance for operations in the harbour.

Meteorological sensors are mounted on a Sensor Cross-Arm with a short mast that is mounted on an existing structure. A single cable connects all the sensors on the cross-arm to a data logger. The meteorological sensors and two hydrologic sensors are connected by separate cables. The hydrologic sensors are averaging pressure sensor for tide measurements and sensor for measurement of conductivity and temperature close to the surface.

An RDCP 600 Current Profiler is placed in a bottom mounting frame on the sea floor. It is connected to the shore station by a 150 meter underwater signal and power cable. This cable has extra cable protection. The RDCP 600 measures current speed and direction in several levels in the water column, including close to the surface. It also measures pressure, conductivity and temperature at the instrument position.

The data logger of the shore station and the RDCP 600 are interconnected by a Galvanic Isolator and a Cascade Coupler. The latter triggers the data logger to start a measurement cycle after receiving a data message from the RDCP. Data from both units are merged into a single message that is converted to ASCII formatted RS232 signals by a PDC-4/RS232 converter.