User Instructions

13
HBM: Business Document
Electrical and magnetic fields often induce
interference voltages in the
measuring circuit. Therefore:
• Use shielded, low-capacitance measurement cables only
• Only use plugs that meet EMC guidelines.
• 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
conduit.
•
Avoid stray fields from transformers, motors and contact switches.
•
Do not ground the transducer, amplifier and indicator more than once.
•
Connect all devices in the measurement chain to the same grounded
conductor.
• In the case of interference due to potential differences (compensating
currents), supply voltage zero and housing ground must be disconnected
on the amplifier and a potential equalization line established between the
evaluation unit and the amplifier housing (copper conductor, minimum 10
mm² wire cross-section).
• Should differences in potential between the machine rotor and stator,
because of unchecked leakage, for example, cause interference, this
can usually be overcome by connecting the rotor definitively to ground,
e.g. with a wire loop. The stator must be connected to the same
(ground) potential.