STB8827
Series Operation Manual Chapter 5 Execute LCR Operation and Some Examples
c) Press
ON
to turn on the open correction function.
d) Move the cursor to the
SHORT
zone,
ON
,
OFF
and
MEAS SHORT
53
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 off the load correction function.
h) Move the cursor to the
SPOT No.
zone to select the calibration point.
i)
Move the cursor to the
FREQ
zone,
ON
,
OFF
,
MEAS OPEN
,
MEAS SHORT
and
MEAS LOAD
will be displayed in the soft key zone.
j) Press
ON
to turn on the point-frequency correction function of
FREQ
.
k) 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).
l)
Keep the test fixture be in open status and press
MEAS OPEN
to execute
open correction.
m) Insert the short plate (26010) to the test fixture.
n) Press
MEAS SHORT
to execute short correction.
5.2 Correct connection of DUT
There are 4 pairs of test terminal: Hcur, Lcur, 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 used under 10kHz, a better measurement result can be obtained.
However, when the frequency is higher than 10kHz, it cannot meet the
measurement demand. In high frequency, the change of the clearance between
