Laser beta lasermike LS8000-3 - Manual (Page 18)

LaserSpeed 8000-3 Instruction Handbook
Installing the System
Part No. 93463 / Drawing No. 0921-01561 Page 18 of 221 Revision A (Sep 2007)
coolant is blown off in the same direction the material is moving, the air
velocity can add or subtract from the material’s velocity; this too may cause
erroneous measurements.
Air Wipe / Quick Change Window
To prevent dust, dirt, and moisture from accumulating on the optical window
the gauge can be fitted with an Air Wipe/Quick Change Window. Clean,
instrument grade air (see
Specifications section for details) is blown at low
pressure over the window to keep it clean. The window can be removed for
easy cleaning. A clean, soft cloth should be used to clean the window. If an
abrasive cloth is used, the optical coating may be damaged, leading to poor
measurements. When replacing the window, put a small amount of vacuum
grease on the O-Ring.
For measurements and details about removing the Air Wipe/Quick Change
Window, see
Appendix A .
Steam & Mist
Steam or mist is sometimes present in some applications. The air-wipe is not
designed to clear steam or mist between the gauge and material, but only to
keep contaminants from depositing on the optics window. Another means of
removing steam or mist may need to be used. The steam or mist may be light
enough to allow the laser beams to pass through without interference. If this is
not true, a fan may be used to clear out the steam or mist between the gauge
and housing. If a fan is not adequate or practical, an “air purge” can be
installed to clear the beam path. Contact your Beta LaserMike representative