Cleaning Instructions How to clean instruments with a physical contact interface
442 Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Sixth Edition
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.
Preferred Procedure
Use the following procedure on most occasions.
1 Clean the interface by rubbing a new, dry cotton-swab over the surface using a 
small circular movement.
2 Blow away any remaining lint with compressed air.
Procedure for Stubborn Dirt
Use this procedure particularly when there is greasy dirt on 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.
Never look into an optical output, because this can seriously 
damage your eyesight. 
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.
WARNING