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MeasureNet is a data collection and analysis network designed to provide high-quality electronic measurements in science laboratories. It departs significantly from the usual approach by not using a personal computer at each laboratory work station. This frees up valuable bench space and substantially reduces the quantity of equipment to be maintained. The networked nature of the system leads to easier implementation of both cooperative and discovery types of exercises by facilitating the combining and sharing of data among groups of students.
A MeasureNet system consists of 10 measurement and display stations, I network controller, and 1 PC with printer, and it serves 20 students working in pairs. Our laboratories have space for 200 students, so we have installed 10 complete networks. One teaching assistant supervises the 20 students on each system.
Through menus on the station display, the students select the measurement type (pH, temperature, pressure, voltage, etc.), calibrate the probe(s), and begin collecting data (Fig. 1). The controller...