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Additional Cleaning Information
C A U T I O N
Alternative Procedure A
Alternative Procedure B
Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition
Only use water if you are sure that there is no other way of cleaning your optical device
without causing corrosion or damage. Do not use hot water, as this may cause mechanical
stress, which can damage your optical device.
Ensure that your liquid soap has no abrasive properties or perfume in it. You should also
avoid normal washing up liquid, as it can cover your device in an iridescent film after it has
been air dried.
Some lenses and mirrors also have a special coating, which may be sensitive to mechanical
stress, or to fat and liquids. For this reason we recommend you do not touch them.
If you are not sure how sensitive your device is to cleaning, please contact the manufacturer
or your sales distributor.
1 Moisten the lens or the mirror with water.
2 Put a little liquid soap on the surface and gently spread the liquid over the whole area.
3 Wash off the emulsion with water, being careful to remove it all, as any remaining
streaks can impair measurement accuracy.
4 Take a new, dry soft tissue and remove the water, by rubbing gently over the surface
using a small circular movement.
5 Blow away remaining lint with compressed air.
To clean lenses 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.
If your lens is sensitive to water then:
1 Moisten the lens or the mirror with isopropyl alcohol.
2 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.
3 Blow away remaining lint with compressed air.
Cleaning Information
95
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