Emc Protection - HBM C9C Montageanleitung

Electrical connection
22
7.3

EMC protection

Electrical and magnetic fields can often induce
interference voltages in the measuring circuit. Pay
attention to the following points to avoid this:
S Use shielded, low-capacitance measurement cables
only (HBM cables fulfill both conditions)
S Do not route the measurement cable parallel to power
lines and control circuits. If this is not possible, protect
the measurement cable with metal tubing
S Avoid stray fields from transformers, motors and
contact switches
S Please note that compensating currents flowing
across the cable shield can cause significant interfer­
ences. If the sensor and its evaluation unit have differ­
ent electrical potentials, an electrical connection with
very low resistance must be provided.
S Connect all the devices in the measuring chain to the
same protective earth conductor.
S Always connect the cable shield extensively on the
amplifier side, to create the best possible Faraday
cage.
A3729-2.2 HBM: public
C9C