C-Dax Pasture Meter, Assembly And Operation Manual

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The geometry and construction of the central section of the sled frame has been
designed to minimize dirt fouling the glass windows covering the sensor’s light
beams. However, given the nature of measuring pasture cover, particularly post
grazing, the glass may occasionally need cleaning. How often this is required is
entirely dependant upon the environment in which the device is working.
Operator experience and regular inspection of the glass windows will ensure
reliability of results.
The Sensor
The sensor consists of 18 light beam emitters at 20 mm spacings on one side of
the sensor frame and 18 light beam detectors at 20 mm spacings on the other
side of the sensor frame. In operation, 18 light beams exist between one side of
the sensor and the other. Whenever any light paths between the two sides are
broken, the result is recorded as a relative height measurement.
FIG 3