Operation Of Light Pipe; Operation Of Focusing Sleeve - Welch Allyn 48700 Operating Instructions Manual

Operation Of Light Pipe

The flexible portions of the Fiberoptic Light Pipe are designed to
be articulated, but not twisted. Twisting or applying torque to the
flexible sections will greatly decrease the life of the Light Pipe.
This type of movement will cause premature drooping of the Light
Pipe (will not stay in place once positioned) and eventually will
result in breakage of the fiberoptic bundle. For best results,
always position the Light Pipe by moving it in the same direction
as gravity. For example, if the pipe needs to be raised, raise it
above the desired position and then lower it into place.
NOTE: Upon manufacture, the Light Pipe is tested to assure
maintenance of positioning and to verify the absence of noise
upon articulation. Over a period of time and use, it is normal for
the Light Pipe positioning capability to reduce and soften
becoming less obedient. Abnormal softening or occurrence of
noise upon articulation should be reported to Welch Allyn
Technical Service (315-685-4560) immediately.

Operation of Focusing Sleeve

The focusing sleeve at the end of the Fiberoptic Light Pipe and
Fiberoptic Light Cable provides adjustment of the illumination spot
size. Twisting the knurled portion of the focusing sleeve in a
clockwise direction will make the spot smaller. Twisting the
knurled portion of the focusing sleeve in a counterclockwise
direction will increase the spot size.
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