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User Maintenance
Wear Check
Wear Check
The wear check allows you to obtain an idea about the deterioration of the
fixture in order to ensure that the desired measurement accuracy is obtained.
This check comprises "User Limit Setting",
"Measuring Impedance
Ls) of the fixture itself is measured. It is recommended to use a frequency that
is also used under the conditions where the fixture is normally used.
Normally, "User Limit Setting" should be conducted under the following
circumstances.
•
•
Normally,
following circumstances.
•
•
Normally,
following circumstances.
•
Example of User Limit Values Setting
It is necessary to decide wear check user limit values suitable for the DUT and
the demanded measurement accuracy. An example follows below.
To measure the inductors L: 10nH and Q: 10 at a frequency (f) of
100MHz with a measurement accuracy degree of 20%;
L:
Q:
Frequency:
Demanded Accuracy:
Using the above conditions, the inductor's reactance X and resistance R are
determined in the following manner.
From
should be approximately 20%, and when L changes 20% (2nH), L and Q both
change 20%. Accordingly, in order to measure both L and Q with a
measurement accuracy of 20% or less, at least the error of L and R must be
less than 2nH and 120m, respectively. While remembering that L and R
Keysight 16196A/B/C/D Parallel Electrode SMD Test Fixture
Shift". Using a desired frequency, the impedance (Rs,
When the equipment is used for the first time following purchase.
When the required measurement accuracy is changed.
"Reference Value Acquisition"
When the equipment is used for the first time following purchase.
Following replacement of parts.
"Measuring Impedance Shift"
Once daily and before fixture compensation is performed.
10nH
10
100MHz
20% for both L and Q
we understand that when R changes 20% (100m) Q
Q
X R
2fL R
=
=
"Reference Value Acquisition"
should be conducted under the
should be conducted under the
6
X
=
2fL
=
R
=
X Q
=
0.6
and
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