Emc Protection - HBM PW37P Montageanleitung

5.6

EMC protection

Important
The load cells with shielded, round cables are EMC-tested in accordance with
EC directives and identified by CE certification. However, you must connect the
shield of the connection cable to the shielding electronics enclosure in order to
achieve EMC protection for the measuring chain.
Electrical and magnetic fields often induce interference voltages in the
measuring circuit. Therefore:
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 a steel
conduit, for example.
S Avoid stray fields from transformers, motors and contact switches.
S Do not ground the transducer, amplifier and indicator more than once.
S Connect all the devices in the measuring chain to the same protective
conductor.
To ensure the best EMC protection, the load cell, together with the connection
cable and the subsequent electronics, should be placed in a shielded housing.
High-energy pulse-shaped disturbance variables while interference is active
may lead briefly to deviations up to ten times the specified tolerances, which
will disappear again when interference is no longer active.
PW37P
A04856_03_Y00_00 HBM: public
Electrical connection
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