TH2829X Series Operation Manual Chapter 5 Execute LCR Operation and Some Examples
a) Press the menu key [SETUP] and then CORRECTION, then instrument will
display the <CORRECTION> function.
b) Move the cursor to the Open zone, ON, OFF and MEAS OPEN will be
displayed in the soft key zone.
c) Press ON to turn on the open correction function.
d) Move the cursor to the SHORT zone, ON, OFF and MEAS SHORT will be
displayed in the soft key zone.
e) Press ON to turn on the short correction function.
f) Move the cursor to the LOAD zone, ON , OFF will be displayed in the soft key
zone.
g) Press OFF to turn on the load correction function.
h) Move the cursor to the FREQ zone, ON, OFF, MEAS OPEN , MEAS SHORT
and MEAS LOAD will be displayed in the soft key zone.
i) Press ON to turn on the point-frequency correction function of FREQ.
j) Press [5] [.] [5], +5.5 will be displayed in the prompt information zone at the
bottom of the screen meanwhile the available units (Hz, kHz and MHz) will
be displayed in the soft key zone. Press kHz, the FREQ zone will be changed
as 5.5000kHz (be the same as that of test frequency).
k) Keep the test fixture be in open status and press MEAS OPEN to execute
open correction.
l) Insert the short plate (TH26010) to the test fixture.
m) Press MEAS SHORT to execute short correction.
5.2 Correct connection of DUT
There are 4 pairs of test terminal: Hcur, Hpot, Lpot and corresponding shielding
terminal of each terminal.
Each terminal contains shielding layer whose function is to reduce the influence of
the ground stray capacitance and the interference of the electromagnetic field. In
the process of testing, Hcur, Hpot and Lpot, Lcur should be connected with DUT
lead to form a complete 4-terminal measurement, thus reducing the effect of the
lead and the connection points on the test results (especially the dissipation
measurement). When testing low-ohm components, Hpot, Lpot should be
connected to the lead terminal so as to avoid the impedance being added to the
lead impedance and the connection principle is that the Hpot and Lpot test should
be the actual existed voltage on DUT.
In other words, before connecting to DUT, it is not recommended to connect Hcur,
Hpot with Lpot, Lcur, for doing this will increase test error.
If the connection point and the lead resistance R lead are far weaker than the
tested impedance (for example: R
lead
<Z
x
/1000, the accuracy error is required to
be less than 0.1%), before connecting to DUT, it is recommended to connect Hcur,
Hpot and Lpot, Lcur (Two terminal test).
In the test with high accuracy requirement, using Kelvin test fixture (standard
accessory) will gain better results than using test leads. When Kelvin test lead is
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