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General Cleaning Procedure
C A U T I O N
Preferred Procedure
Procedure for Stubborn Dirt
C A U T I O N
C A U T I O N
Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition
How to clean bare fiber adapters
Bare fiber adapters are difficult to clean. Protect from dust unless they are in use.
Never use any kind of solvent when cleaning a bare fiber adapter as solvents can:
• Damage the foam inside some adapters.
• Deposit dissolved dirt in the groove, which can then dirty the surface of an inserted fiber.
Use the following procedure on most occasions.
1 Blow away any dust or dirt with compressed air.
Use this procedure when there is greasy dirt on the adapter:
1 Clean the adapter by pushing and pulling a new, dry pipe cleaner into the opening.
Rotate the pipe cleaner slowly as you do this.
Be careful when using pipe cleaners, as the core and the bristles of the pipe cleaner are
hard and can damage the adapter.
2 Clean the adapter by rubbing a new, dry cotton swab over the surface using a small
circular movement.
3 Blow away any remaining lint with compressed air.
How to clean lenses and instruments with an
optical glass plate
Some lenses have special coatings that are sensitive to solvents, grease, liquid and
mechanical abrasion. Take extra care when cleaning lenses with these coatings. Some
instruments, for example, Agilent's optical heads have an optical glass plate to protect the
sensor.
Do not attempt to access the internal parts of an Agilent N3988A video microscope for
cleaning or for any other purpose.
Lens assemblies consisting of several lenses are not normally sealed. Therefore, use as little
alcohol as possible, as it can get between the lenses and in doing so can change the
properties of projection.
If you are cleaning an Agilent 8162*A optical head, periodically inspect the optical head's
front window for dust and other particles. Dust and particles can be propelled through the
optical head adapter's pinhole while inserting a connector ferrule into the receptacle.
Particles on the optical head's front window can significantly impair measurement results.
N O T E
Do not dry the lens by rubbing with with cloth or other material, which may scratch the lens
surface.
Cleaning Information
89
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