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Measuring Equipment

Due to its design, the measurement adapter HZ188 has a
fringing capacitance, a residual inductance and a residual
resistance which impact the accuracy of the measured va-
lues. To minimize these impacts, the compensation of im-
pedance 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
HM8118. For the open compensation, for the test adapter
HZ188 you must loosen the screw on the right side coun-
terclockwise and then push the right contact pin to the
right until both contact pins are electrically open. The re-
sulting gap between the contact pins must correspond
to the dimensions of the SMD component to be mea-
sured. Fixate the right contact pin by turning the screw
clockwise.

For the short compensation, for the test adapter HZ188
you must loosen the screw on the right side counterclock-
wise and then push the right contact pin to the left un-
til both contact pins are electrically connected. Fixate the
right contact pin by turning the screw counterclockwise.

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 HZ188

The compensation values that are measured during the
compensation process will be stored in the memory of the
LCR bridge HM8118 and are valid until another compensa-
tion is performed. If any changes to the measurement se-
tup are implemented, it becomes necessary to perform
a new compensation. For more information about the
OPEN/SHORT compensation, see chapter 7.2.

8.5 Sorting Components with Option 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 HO118 binning interface enables the use with exter-
nal hardware which sorts components by physical type af-
ter the HM8118 measurement. Data lines for eight sorting
containers and control lines are intended (ALARM, INDEX,
EOM,TRIG).

8.5.1 HO118 Circuit

The HM8118 with integrated HO118 binning interface is al-
ways 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 position 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 circuit is „active low“, i.e.the voltage drops to 0V as
soon as the criterion for the respective BIN (set in the ins-
trument) is met. The function of the binning interface can

The test adapter 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 HO118 (binning interface)

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