Precision 7 Mm Connectors; Cleaning Interior Surfaces - Keysight Technologies N4000A SNS Series Operating And Service Manual

Carefully avoid wetting the plastic support bead (which is easily damaged by
alcohol) inside the connector and blow the connector dry immediately with a
gentle stream of compressed air.

Precision 7 mm connectors

When precision 7 mm connectors have been cleaned with the center conductor
collet removed, insert the collet and clean the mating plane surfaces again.
When the connector is attached to a small component, or to a cable, calibration,
or verification standard, the easiest way to do this is to put a lint-free cleaning
cloth flat on a table and put a couple of drops of alcohol in the center of the cloth.
It should be noted that it is not necessary to remove the collet to use this cleaning
method.
Retract the connector sleeve threads so that the connector interface is exposed.
Gently press the contact end of the connector into the cloth moistened with
alcohol, then turn the connector.
Dirt on the connector interface will be scrubbed away by the cloth without
damaging the connector. Blow the connector dry with a gentle stream of
compressed air.
This cleaning method can be adapted even for fixed connectors such as those
attached to test ports. Simply fold the cloth into several layers of thickness,
moisten it, press it against the connector interface, and turn it to clean the
connector. Blow the connector dry with a gentle stream of compressed air.

Cleaning interior surfaces

Interior surfaces, especially on precision 3.5 mm connectors, are very difficult to
reach, and it is easy to damage connectors in trying to clean them. The openings
are very small, and generally the center conductor is supported only at the inner
end, by a plastic dielectric support bead. This makes it very easy to bend or break
the center conductor.
One suitable method
toothpick, or a smaller diameter wooden rod, and then to wrap it with a single
layer of lint-free cleaning cloth.
Keysight N4000/1/2A Operating and Service Manual
(Figure A-4) is to cut off the sharp tip of a round wooden
Caring for Connectors A
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