444 8163A/B, 8164A/B, 8166A/B User’s Guide
15 Cleaning Instructions
How to clean instruments with a physical contact interface
Remove any connector interfaces from the optical output of the instrument
before you start the cleaning procedure.
Cleaning interfaces is difficult as the core diameter of a single-mode fiber
is only about 9 μm. This generally means you cannot see streaks or
scratches on the surface. To be certain of the degree of pollution on the
surface of your interface and to check whether it has been removed after
cleaning, you need a microscope.
Please pay attention to the following laser safety warnings:
• Do not switch on the instrument when there is no termination to the
optical output connector, to the optical fiber or to the attached
device. The laser radiation can seriously damage your eyesight.
• The use of other optical instruments with this product will increase
the hazard to your eyes.
• To assess the projection of the emitted light beam you can use an
infrared sensor card. Hold the card approximately 5 cm from the
interface. The invisible emitted light is project onto the card and
becomes visible as a small circular spot.
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