Keysight 11923A, Operating And Service Manual

Page: 27 / 39

Making Connections 4
Keysight 11923A Operating and Service Manual 27
Visual Inspection
Visual inspection, and if necessary, cleaning should be done every time a connection is made.
Metal particles from the connector threads may fall into the connector when it is disconnected.
One connection made with a dirty or damaged connector can damage both connectors beyond
repair.
Required inspection tools
A minimum magnification of 10X is required to inspect the mating surfaces, connector contacts,
and concentricity of the 1.0-mm connectors. It is also necessary to use good lighting (such as a
halogen task light) to see the damage on a connector. Use the guidelines in Obvious defects or
damage when evaluating the integrity of your connectors.
Obvious defects or damage
Examine the connectors first for obvious defects or damage:
– Plating
– Bare metal showing
– Burrs or blisters
– Deformed threads
– Center Conductors
– Bent
– Broken
– Misaligned
– Concentricity
Connector nuts should move smoothly and be free of:
– Burrs
– Loose metal particles
– Rough spots
Any connector that has obvious defects should be discarded. See Figure 4-1 , Figure 4-2 , and
Figure 4-3 for visual inspection guidelines.
Connector contacts
Refer to Figure 4-1 for visual guidelines to aid you in evaluating the contact integrity of a
connector.
Take careful note of the location of the cross hairs in relationship to the center of the following
figures.