Keysight Technologies 85058V, User'S And Service Manual

Page: 23 / 58

85058V 3-3
Use, Maintenance, and Care of the Devices
Visual Inspection
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.
CAUTION Devices with damaged connectors should be immediately discarded or clearly
marked and set aside for repair. A damaged device will in turn damage any good
connector to which it is attached. Determine the cause of the damage before
connecting a new, undamaged connector in the same configuration.
In some cases, magnification is necessary to see damage to a connector; a magnifying device
with a magnification of  10  is recommended. However, not all defects that are visible only
under magnification will affect the electrical performance of the connector. Use the following
guidelines when evaluating the integrity of a connector.
Look for Obvious Defects and Damage First
Examine the connectors first for obvious defects or damage: badly worn plating on the
connector interface, deformed threads or bent, broken, or misaligned center conductors.
Connector nuts should move smoothly and be free of burrs, loose metal particles, and rough
spots.
What Causes Connector Wear?
Connector wear is caused by connecting and disconnecting the devices. The more use a
connector gets, the faster it wears and degrades. The wear is greatly accelerated when
connectors are not kept clean, or are not connected properly.
Connector wear eventually degrades performance of the device. Verification devices should
have a long life if their use is on the order of a few times per week. Replace devices with worn
connectors.
The test port connectors on the PNA test set may have many connections each day, and are,
therefore, more subject to wear. It is recommended that an adapter be used as a test port saver
to minimize the wear on the test set’s test port connectors.
Connector Contacts
See Figure 3-2 on page 3-4 for visual guidelines when evaluating the contact integrity of a
connector.
NOTE Notice the location of the cross hairs in relationship to the center of the figures.