MTS Series LX Laser Extensometer - Manual (Page 27)

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LX Laser Extensometer Safety 27
Safety Checkout
1. Check the laser emission indicator.
With the laser extensometer ON and the LASER DISABLE SWITCH in the
LASER ON position, verify that the LASER EMISSION INDICATOR is
illuminated only when the scanning Laser Beam is present.
2. Check the laser disable switch.
With the laser extensometer ON and the scanning Laser Beam present,
verify that the LASER DISABLE SWITCH shuts down the scanning Laser
Beam.
3. Check the laser shutdown circuit.
Verify this feature is functional by observing the delayed appearance of the
scanning laser beam when the laser is enabled.
A. Start with the laser extensometer on and the scanning laser beam
present. Set the laser disable switch to the off position to shut down the
scanning laser beam.
B. Allow approximately one minute to elapse until the scan motor stops
rotating.
C. Return the laser disable switch to the on position and note the time
delay before the scanning laser beam appears.
D. The beam should appear a few seconds after setting the disable switch
to the on position. If no time delay is observed, the laser shutdown
circuit is not operating properly. Contact MTS for service.
4. Check laser power level.
This check verifies the Laser Emission Level is within the acceptable range
for a Class II laser product. You will need an optical power meter calibrated
for a wavelength of 670 nm with a minimum full scale range of 1.0 mW.
A. Turn the laser extensometer on and allow a 30 minute warm up time.
B. Turn on the optical power meter. Set controls per the manufacturer's
instructions.
C. Position the measuring head of the optical power meter in the scanning
laser beam. Measure and record the power reading. The output power
reading must be less than 1.0 mW; if not, contact MTS for service.