Emc Protection - HBM Z6 Série Manuel D'emploi

Electrical connection
16
5.6

EMC protection

Background information
Electrical and magnetic fields often induce interference
voltages in the measuring circuit. For reliable measure­
ments, signal differences of less than 1μV must be trans­
mitted without interference from the transducer to the
evaluation electronics.
Planning of the shielding concept
Due to the numerous application options and the different
local constraints, we can only provide you with informa­
tion for correct connection. The shielding concept suit­
able for your application must be planned locally by an
appropriate specialist.
The load cells with shielded, round cables are EMC-
tested in accordance with EC directives and identified by
CE certification.
Points to be observed
S Use shielded, low-capacitance measurement cables
only (HBM cables fulfill both conditions).
S Do not route the measurement cables parallel to
power lines and control circuits. If this is not possible,
protect the measurement cable with e. g. steel con­
duit.
S Avoid stray fields from transformers, motors and con­
tact switches.
S Connect the shield of the connection cable exten­
sively on the shielding electronics housing. When
using several load cells, connect the shield exten­
sively to the junction box (combination of transducer
signals, e.g. type VKK2 from HBM). From there, con­
A1027-4.1 HBM: public
Z6...