Maintenance; Performance Veri Cation; Repair; Possible Problems And Their Solution - Agilent Technologies 4286A User Manual

Maintenance

This appendix provides information on performance veri cation, repair, replacement of Center
Conductor Collet, line voltage setting changes, and fuse replacement.
Performance Veri cation
The 4286A requires periodic performance veri cation. How often you verify performance
depends on the operating and environmental conditions. The recommended cycle is at least
once a year. The performance veri cation procedure is described in the Service Manual . For
the customer who does not have the test instruments required for performance veri cation
or who wants to save time, Agilent Technologies provides calibration service. For detailed
information, contact the nearest Agilent Technologies oce.

Repair

When your meter seems defective, the following section of \Possible Problems and Their
Solution" will help you to determine what to do. If you can not nd a solution, contact the
nearest Agilent Technologies oce. If you send the instrument to Agilent, include information
about the trouble symptom. Send all of your meter, including the mainframe, test station, test
head and calibration kit (0 , 0 S, 50 terminations and low-loss capacitor).

Possible Problems and Their Solution

meter does not turn on:
Check the fuse and the voltage selected.
Measurement trace is not stable:
1. Check the test station, the test head, and the xture connection.
2. Check the center conductor collet of the APC-7 connector on the test head, the
50 termination, and the low-loss capacitor. If a collet is defective, replace it (see
\Replacement of Center Conductor Collet").
Measurement trace is displayed as a line or is not smooth:
The number of measurement points may be too small.
B
Maintenance B-1