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The NetDI® data logger was developed over many years to fulfill complex measuring, controlling and regulation tasks. A multitasking real-time kernel takes care of the processes of all tasks. It works on the basis of an embedded industrial ARM. The 7“ touchscreen visualizes data in a quick-look window.
The calculation of calibrations or corrections takes place in real-time – there are more than 180 formulas available to do so, like for instance the UNESCO formulas for seawater. Quality rating additional data as spikes, extremes or means are gathered simultaneously into average value windows.
A complete, configurable soft-PLC undertakes complete controlling tasks. The optional position control operates in dependence to the GPS position and geo-references the measurement data.
19” rack enclosure (4 HU, 350mm depth) with 4 external sensor connectors IP67 water protected and 2 fluorometers connected
Metal enclosure (300 x 300 x 180mm) with 2 external sensor connectors IP67 water protected with 2 fluorometers connected
The OceanPack™ AUMS (FerryBox) is operated by the SmartDI® Deck-Unit. While data acquiring is performed automatically, the scientist has time to maintain his instruments
OceanPack™ underway system contains the NetDI® Deck-Unit. In the photo, the power controller is used to seperate power from the data acquisition. The Deck-Unit controls automatic cleaning, automatic calibration, data recording etc.
Small mobile NetDI® data logger during project discussions with GEOMAR (Dr. Toste Tanhua) and Volvo Ocean Race (Dr.-Ing. Sören Gutekunst). Left Dr. Stefan Raimund from SubCtech.
The small mobile NetDI® data logger.
Small 7″ display for the mobile NetDI®
Example of NetDI® display: data upload to the USB memory stick.
The SmartDI® Soft-PLC is can be used to control external pumps and valves. Using measuring values as input, the Soft-PLC can be used e.g. for event-triggered analyzes. In this example a combination of two sensors is used to start automatic water analysis with nutrient analyzer. Demanded storm becomes whirled up of floating substances as an event. © picture by HZG research centre
The optional quality data for each measuring or average value gives much more information about the obtained state. In this example higher tidal water current is responsible for noisy turbidity values. The minimum and maximum values of the water current explain this situation very well, without the need of extra processing. © picture by HZG research centre
The Position-control allows using position-dependent events. In this example the OceanPack™ will clean itself and then switch off automatically if moving inside the harbour. Piraeus (Athens) with position recognition as entering a port is here defined with a radius of 1sm (1.852km) to the pier
The ASCII NMEA-0183 data files can be imported easily to Windows® software such as MS-Excel®