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The Laserscan
200 is a versatile, non-contacting measuring instrument. A
bright red scanning beam illuminates the sample and gauge
markers, making it easy to set up and align.
The Laserscan
200 includes four gain settings allowing it to be used over
a wide range of gauge lengths without adjustment to its
calibration or position. It incorporates a digital display,
which is used to facilitate calibration and provide a
continuous readout.
The instrument
has an analogue output (0-10V) which allows it to be
interfaced with all Lloyd Instruments and most other
materials testing machines. Two reflective markers denote
the gauge length of the sample. The Laserscan senses the
leading edges of these markers and is unaffected by their
shape, making accurate setting of the gauge length a very
simple procedure.
An 80Hz laser
beam sweeps the axial length of the specimen, illuminating
and detecting the position of the gauge markers. As the
sample is stressed the markers separate and any movement is
measured. The Laserscan 200 is supplied with an adjustable
stand to allow accurate positioning for different length
test specimens.
Applications
The Lasercan 200 allows accurate strain measurement from a
wide range of materials with varying ductility including
plastics, film, rubber and textiles.
The Laserscan
200 eliminates any problems associated with contacting
extensometers making it particularly suitable for
elastomeric samples where the pressure of knife edges on a
contacting extensometer could induce local stresses and
weaken the sample. Specialist punches for applying
reflective tape targets can be ordered separately. |
