Kobold NSC, Руководство по эксплуатации

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NSC
DT0307 Page 11
11. Safety Instructions (ATEX)
1. Validity
This security considerations must be applied to all level switches NSC...EX when
used in explosive atmospheres under CE certificate type LOM 05ATEX2060 X.
2. General considerations.
Operating principle of level switches NSC...EX is the capacity variation of the media
when product is present. They are used for level control in hazardous zones.
They can be used in hazardous zones group II and category 1/2D.
Probe of the instrument can be installed in hazardous zones category 1D.
The connection element of the instrument is mounted in the border of zones 2D and
1D.
All instructions and recommendations must be followed during the installation of the
instrument in hazardous areas. Also the ones mentioned on this manual.
Cable glands must be selected according to the required certification.
Verify that label contents fits requirements of application.
All requirements of the ATEX2014/34/EU Directive must be correctly followed and
also the national rules related to measurement instruments used in hazardous areas.
For instance: EN 60079-0, EN 60079-31, EN 60079-11 and all the other ones related
to the required certification.
Remove power supply before opening cover of the housing or at least be sure that
no explosion risk is present.
Check that cover of housing is correctly mounted before applying power to the
instrument.
Verify that there is no mechanical stress due to installation on the tank.
It is very important to verify that the instrument ground and the system ground are
correctly connected.
The installation of instruments in hazardous areas must be exclusively done by
trained people.
3. Protection against electrostatic discharge
Level switches with plastic parts that can acquire electrostatic charges, must have a
corresponding warning label.
Avoid situations of electrostatic discharges like:
-Avoid friction on plastic parts.
-Avoid cleaning with a dry cloth
-Avoid installing close the steam sources or pneumatic product sources.