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Keysight N4373D Lightwave Component Analyzer, User's Guide
Preferred procedure Use the following procedure on most
occasions.
1 Blow away any dust or dirt with compressed air.
If this is not sufficient, then
a Clean the interface by rubbing a new, dry cotton swab
over the surface using a small circular movement.
b Blow away any remaining lint with compressed air.
Procedure for stubborn dirt Use this procedure when there is
greasy dirt on the interface, and using the procedure for light
dirt is not sufficient.
Using isopropyl alcohol should be your last choice for recessed
lens interfaces because of the difficulty of cleaning out any dirt
that is washed to the edge of the interface.
1 Moisten a new cotton swab with isopropyl alcohol.
2 Clean the interface by rubbing the cotton swab over the
surface using a small circular movement.
3 Take a new, dry soft tissue and remove the alcohol, dissolved
sediment and dust, by rubbing gently over the surface using a
small circular movement.
4 Blow away any remaining lint with compressed air.
How to clean optical devices which are sensitive to mechanical
stress and pressure
Some optical devices, such as Reference Reflectors, are very
sensitive to mechanical stress or pressure. Do not use cotton
swabs, soft tissues or other mechanical cleaning tools, as these
can scratch or destroy the surface.
Preferred procedure Use the following procedure on most
occasions.
1 Blow away any dust or dirt with compressed air.
Procedure for stubborn dirt To clean devices that are extremely
sensitive to mechanical stress or pressure you can also use an
optical clean polymer film. This procedure is time-consuming,
but you avoid scratching or destroying the surface.
1 Put the film on the surface and wait at least 30 minutes to
make sure that the film has had enough time to dry.
2 Remove the film and any dirt with special adhesive tapes.
Maintenance
121
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