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9.1.2 Connecting conductive parts to earth
When the instrument is not grounded securely through the connection process, it should be
grounded through the housing screw, as shown in the figure.
9.1.3 Maintenance
NOTE: The cover should never be opened in presence of explosive atmosphere.
There is no special maintenance for the ATEX version.
9.1.4 Technical characteristics of the ATEX version
They are the same as in the section 7.
Grounding screw