Interference Effects; Shielding Design; Grounding - HBM WI/5mm-T Montageanleitung

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Interference effects

Carrier frequency transmission is highly insensitive to electrical interference.
Even so, high intensity interference can falsify measurements.
Interference can be injected into a measuring circuit from a source which is:
electromagnetic,
inductive,
galvanic,
mechanical.
Interference is most commonly caused by:
high power transmission lines running parallel to the measurement circuit
nearby relays (contactors)
electric motors
potential differences in the grounding system or polyphase grounding of the
measurement chain
potential differences caused by capacitive influences
vibration

6.1 Shielding design

Using HBM's Greenline shielding design ensures that the entire measurement
chain is completely enclosed in a Faraday cage, due to the special way the
cable shield is arranged (see also reprint G36.35.0, Greenline shielding
design).

6.2 Grounding

All devices − transducers, amplifiers and display devices − are located on
a ground potential (if necessary wire to a potential equalization line).
If this is not possible, the transducer should be fitted ground isolated.
HBM
WI
A1028 3.1 de/en/Fr