Aplisens SGE-25S.SMART Руководство пользователя - Страница 14
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EN.IO.SGE.25.SMART
7.2.2. Shielding
The cable shield (green wire) is led out from the probe's power supply and measurement cable. The
manufacturer recommends connecting the probe cable shield to the measuring system grounding point.
The earthing of the cable screen is especially justified in the environment of high EMC disturbances.
In a battery-assisted piezometric stand, the cable screen may or may not be grounded.
7.3. Overvoltage protection
Probes can be exposed to switching surges, or those resulting from lightning discharges. Protection
against surges between the wires of the transmission line is provided by surge diodes.
For protection against overvoltage between the transmission line and the ground or the enclosure
(which are not protected by diodes connected between the line conductors), the probes in standard
versions and Exi in SA version are equipped with additional protection in the form of surge arresters.
For systems with long signal transmission lines, it is recommended the using of an additional Aplisens
UZ-2 overvoltage protection circuit.
7.4. Final wiring inspection
After completing the electrical installation of the probe, check the following:
-
that the supply voltage measured at the power supply terminals of the cable connection at the
maximum current is in accordance with the supply voltage range specified on the nameplate;
-
that the probe is connected in accordance with the information given in section
connection with possibility of local HART
-
if a junction box is used, that the glands are tightened.
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communication)
(➔ Cable
Revision 01.A.001/2021.09