Aplisens SGE-25.SMART Manuale d'uso - Pagina 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.

communication)

(➔ Cable

Revision 01.A.001/2021.09