Rohde & Schwarz HM8118 User Manual Download

Page: 64 / 76

Measuring Equipment

8.4.1 Compensation R&S®HZ188

Due to its design, the measurement adapter R&S®HZ188
has a fringing capacitance, a residual inductance and a re-
sidual resistance which impact the accuracy of the mea-
sured values. To minimize these impacts, the compensa-
tion of impedance errors caused by adapters becomes
necessary.

To compensate or eliminate this measurement error, it is
recommended to perform an open and short compensa-
tion (OPEN/SHORT compensation) with the LCR bridge
R&S®HM8118. For the open compensation, for the test
adapter R&S®HZ188 you must loosen the screw on the
right side counterclockwise and then push the right con-
tact pin to the right until both contact pins are electrically
open. The resulting gap between the contact pins must
correspond to the dimensions of the SMD component to
be measured. Fixate the right contact pin by turning the
screw clockwise.

For the short compensation, for the test adapter
R&S®HZ188 you must loosen the screw on the right side
counterclockwise and then push the right contact pin to

For frequency dependent components, make sure to perform
an OPEN and SHORT compensation for each of the 69 test
frequencies.

Änderungen vorbehalten

Für den „Kurzschlussabgleich“ ist bei dem Messadapter

HZ188 die Schraube auf der rechten Seite gegen den Uhr-

zeigersinn zu lösen und anschließend der rechte Kontaktstift

mit der Taste nach links zu drücken, bis beide Kontaktstifte

elektrisch verbunden sind. Danach ist der rechte Kontakt-

stift durch drehen der Schraube im Urzeigersinn zu fixieren

(siehe Bild 2).

Bild 2 „Kurzschlußabgleich“

Screw

Lever

Without SMD
Component

Fig. 8.13: Open compensation with R&S®HZ188

the left until both contact pins are electrically connected.
Fixate the right contact pin by turning the screw counter-
clockwise. The compensation values that are measured
during the compensation process will be stored in the me-
mory of the LCR bridge R&S®HM8118 and are valid un-
til another compensation is performed. If any changes to
the measurement setup are implemented, it becomes ne-
cessary to perform a new compensation. For more infor-
mation about the OPEN/SHORT compensation, see chap-
ter 7.2.

8.5 Sorting Components with Option R&S®HO118

Binning Interface

A binning interface (25 pol. interface) is particularly useful
for a production environment:

❙

To test incoming components, e.g. for incoming goods,

❙

To select components by limit,

❙

To test multiple components with similar values

The R&S®HO118 binning interface enables the use with ex-
ternal hardware which sorts components by physical type
after the R&S®HM8118 measurement. Data lines for eight
sorting containers and control lines are intended (ALARM,
INDEX, EOM,TRIG).

8.5.1 R&S®HO118 Circuit

The R&S®HM8118 with integrated R&S®HO118 binning in-
terface is always delivered in a condition that allows for an

external power supply to be connected. Specifically, this

means that jumper J1 is on position 2-3, jumper J3 on po-
sition 1-2 and the DIP switch set to „OFF“. These settings
deactivate the internal pull-ups.

The following conditions must be be met to operate the
binning interface:

❙

Use external pull-ups.

❙

Provide external power supply between 5V and 40V.

The test adapter R&S®HZ188 allows SMD components of up to a
size of 0603 to 1812 (in inches) to be tested. This corresponds to
a size of approximately 1.6mm to 4.5mm.

Fig. 8.15: Optional equipment R&S®HO118 (binning interface)

We recommended the factory-installed option R&S®HO118.
Otherwise, it becomes necessary to open the instrument which
would break the warranty seal which in turn would void the
warranty.