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....Models LE-01 and LE-05
Laser Extensometers .... |
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 Laser
Extensometer
These extensometers are high precision non-contacting
units for strain measurement in materials testing. They
use a high speed laser scanner to measure the spacing
between reflective tape strips on the sample. The measurement
range is from 0.3 to 3.2 inches (8 to 81 mm) on the
LE-01 and 0.3 to 5 inches (8 to 127 mm) on the LE-05.
The gage length is determined by the user. This allows
high elongation measurements when shorter gage lengths
are used. The high resolution also allows accurate measurements
of smaller strains.
The self-contained extensometer uses state-of-the-art
laser diode technology. A digital display is included.
The analog output may be used to connect to existing
test controls. The RS-232 serial communications interface
provides two way communications. Operation may be local
or remote.
The scanning beam is always perpendicular to the specimen,
unlike most laser extensometers. This eliminates errors
when viewing through windows in chambers. It also minimizes
sensitivity to the distance between the extensometer
and the sample. Because the unit measures reflected
light, no receiver is required behind the sample. |
Easy
to use
The
visible laser light is simply aimed at the specimen,
which has small reflective tape strips set at the gage
length desired. The extensometer displays the actual
measured gage length. If desired, the zero button will
off set the output to zero. As the specimen is tested,
the display will then read the elongation directly.
The analog output and RS-232 interface are easily connected
to existing controls or data acquisition systems.
Clip-on reflectors may be used as an alternate to tape
reflectors. These are re-useable and available as an
option. |
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Features:
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Non-contacting
design requires only reflective tape marks on
the specimen, or clip-on reflectors |
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Ideal
for use in chambers-calibration not affected by
aiming through viewing windows. |
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High
resolution of 1 micron. |
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Full
3.2 inch (81 mm) or 5 inch (127 mm) measuring
range allows high elongation measurements (e.g.
200% on a 1 inch gage length). |
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Specifications:
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Measurement Range:
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LE-01: 0.3 to 3.2 inches (8
to 81 mm), LE-05: 0.3 to 5 inches (8 to 127 mm) |
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Resolution:
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LE-01: 0.3 to 3.2 inches (8
to 81 mm), LE-05: 0.3 to 5 inches (8 to 127 mm): Display
100 microinches or 1 micron Analog output and RS-232
are 1 micron resolution on lower ranges |
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Linearity':
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LE-01: ±0.0002
inches (±0.005 mm), LE-05: ±0.0004 inches (±0.01 mm)
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Repeatability':
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LE-01: ±0.0001 inches (±0.001
mm), LE-05: ±0.0002 inches (±0.005 mm) |
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Scan Rate:
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100 scans/second
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Target Distance:
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10 inches nominal (254 mm),
20 inches max (508 mm) |
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Zero Suppression:
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Reading may be
set to zero anywhere in measuring range |
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Scan Line Orientation:
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Vertical |
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Scan Averaging:
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Moving window
averaging over a selectable number of scans |
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Analog Output:
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16 bit, selectable range,
±5 VDC full scale standard, ±10 VDC optional |
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Full scale ranges:
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0.1, 0.2, 0.5,
1.0, 2.0, or 5.0 inches, or 2.0, 5.0,10, 20, 50, or
100mm |
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Digital Communications:
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RS-232 serial communications,
standard 3 wire |
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Selectable baud rate:
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9600, 4800, 2400,
or 1200 |
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Display:
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2 line, 16 character digital
display, backlit LCD |
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Power Input:
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115 VAC ±10%,
50/60 Hz standard, 230 VAC ±10%, 50/60 Hz optional |
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Size:
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13 x 7.1 x 4.5 inches deep
(330 x 180 x 114 mm) |
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Weight:
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10 lbs (4.5 kg
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Mounting Provisions:
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1/4-20 UNC tapped holes in
base (4) |
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Laser Source:
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Diode laser,
670 nM, <1 mW maximum scanned output CDRH Certified
Class 11 laser instrument |
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Options:
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Consult factory for options
like reflective clips for high temperature use. |
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1 Over optimum displacement range
at calibrated distance
Note: Specifications measured at 25 °C and 50 percent
rel. humidity.
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CALIBRATION
SERVICES, INC.
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300 Buttertown Road
Emlenton, PA 16373
(724) 867-6664 or (800) 793-1870
FAX (724) 867-1346
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