Keysight Technologies 16197A, Operation And Service Manual

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44 Keysight16197A Operation and Service Manual
User Maintenance
Description
4-
Maintenance of the fixture is important especially to ensure fine or highly
accurate measurement, since deteriorated measurement performance of the
fixture has a significant effect on the measurement results. Depending on the
required measurement performance, it may be necessary to increase the
frequency of maintenance and/or adopt more strict criteria for each
maintenance item.
The electrodes and shorting bars are consumable. Of all the fixture
components, these parts are most likely to affect the measurement results. The
electrodes tend to deteriorate gradually since they can easily be smeared with
solder transferred from the DUT during measurements. Because shorting bars
are used to determine the zero reference for fixture compensation, smeared or
deformed shorting bars can directly influence measurement results. This
chapter describes the general user maintenance requirements, focusing
primarily on the electrodes and shorting bars.
Replacement of
parts
When deterioration
check result is
unacceptable
Changing the
orientation of the
contact
assembly, or
replacement of
parts
Center electrode,
Electrode plate
Shorting bar
Assembly check After replacement of
parts
Evaluation of
absolute Ls and
Rs values
Center electrode,
Electrode plate
Shorting bar
a. For details, see
“Acquiring Reference Values” on page 48
.
Table 4-1 Maintenance Items
Name Frequency of
implementation
Contents Target parts