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The TCM-3 is a current meter that is designed to operate off the continental shelf in water up to 4500m depth. The TCM-3 is constructed from toughened syntactic foam with a titanium pressure housing and is easily deployed by small ROVs. The relatively low cost makes it feasible to accurately measure current in many locations simultaneously.
The core of the TCM-3 is the MAT-1 Data Logger. The MAT-1 data logger was designed for NOAA and is ideally suited as the "brains" of a tilt current meter. The built-in data logger includes a USB communication interface, a microSD flash memory card, and a long-life lithium battery.
The TCM-3 Tilt Current Meter measures current using the drag-tilt principle. The logger is buoyant and is typically attached to the bottom via a short flexible tether to a small lead or concrete anchor. Moving water tilts the logger in the direction of flow. The TCM-3 contains a 3-axis accelerometer and 3-axis magnetometer for measuring tilt and bearing. The resulting orientation data is converted to current by applying calibration coefficients with the included software.
Domino Software is Lowell Instrument's Python based, open source software for use with the data loggers and current meters. It is used forconfiguration and control of meters, as well as for conversion of binary data to useful formats. It can be downloaded here.
System Requirements Windows for Domino