Visual Inspection; Mechanical Inspection - HP 54753A User Manual

C A U T I O N
Make sure that you and your equipment are grounded before touching any
center conductor so you won't cause static electricity and create a potential
for electrostatic discharge. When using or cleaning connectors, be aware that
you are touching exposed center connectors that are connected directly to the
internal circuits of the oscilloscope. Touching the center conductor, especially
with a wiping or brushing motion, can cause an electrostatic discharge (ESD)
and severely damage these sensitive circuits.
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Care and Handling of Precision Connectors

Visual Inspection

Visual Inspection
Always begin a calibration with a careful visual inspection of the connectors,
including the test set connectors to make sure they are and undamaged.
Use an illuminated, 4-power magnifying glass for visual inspection.
Before you begin, make sure you and any equipment you are using are
grounded to prevent electrostatic discharge.
Examine the connectors first for obvious problems, such as deformed
threads, contamination, or corrosion.
Next concentrate on the mating surfaces of each connector. Look for
scratches, rounded shoulders, misalignment, or any other signs of wear
or damage.
Make sure that the surfaces are clean, free of dust and solvent residues.
Dirt or damage visible with a 4-power magnifying glass can cause
degraded electrical performance and possible connector damage. All
connectors should be repaired or discarded immediately.

Mechanical Inspection

Mechanical inspection of the connectors is the next step. This inspection
consists of using the appropriate male or female precision 3.5 mm connector
gauge to check the mechanical dimensions of all connectors, including those on
the test set. The purpose of doing this is to make sure that perfect mating will
occur between the connector surfaces. Perfect mating assures a good electrical
match and is very important mechanically to avoid damaging the connectors
themselves, especially on the oscilloscope.
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