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The light source of the vibrometer is a helium neon laser. It is important to
understand that laser light has different properties than ordinary light sources.
Laser radiation is generally extremely intense due to the beam’s low diver-
gence and great care should be taken when handling laser instruments that
the direct or reflected beam does not enter the eye. To ensure this, the follow-
ing precautions have been taken:
In general, Polytec equipment complies with the standards
(1
(DIN VDE 0837) and
&)5
(US).
The optical output of the laser is less than 1mW providing the equipment
is used in the manner for which it was intended. This means that the vibro-
meter conforms with
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and is generally very safe. Even when
optimally focused, the laser radiation is not intense enough to harm the
skin.
The sensor head has been equipped with a
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which can be
used to block the laser beam during the warm-up phase or when the vibro-
meter is not in use, although switched on.
The
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on the sensor head indicates the activity of the
laser and thus potential harm caused by emitted laser beams.
The beam shutter is always
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from the aperture of the
laser beam. Special editions of the fiber optical sensor heads with fiber
lengths of 3m are fitted with an additional emission indicator which is inte-
grated in the fibers.
The laser is switched on via a
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on the controller. The key can
only be removed when the controller is switched off.
It is
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the housing of the sensor head when using
the vibrometer as intended. Opening the housing will invalidate the war-
ranty.
3OHDVH SD\DWWHQW L RQ
to the following
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when using the
vibrometer:
Never look directly into the laser beam with the naked eye or with the aid
of mirrors or optical instruments!
Only switch the beam shutter to the ON position when you are making
measurements!
To position the sensor head, switch the beam shutter to the OFF position.
Only when the sensor head is roughly in place and has been fixed in a
stable position, switch the beam shutter to ON.
Do not use any reflective tools, watches etc. when you are working in the
path of the laser beam!
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