JUMO 405071, Руководство по эксплуатации

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7 Maintenance
In case of defect, return the instrument to your supplier with a precise
description of the fault.
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If the pressure converter is used in an explosive area that could
contain dust (Zone 20, 21 or 22), it must be dusted regularly - in case
of position or of place of mounting unfavourable.
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The degree of protection of the envelope must be permanently filled for this
purpose, the packing seals must be maintained in good condition.
Before any intervention on the equipment, it should be strictly observed that the
safety-related instructions are respected.
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Before disassembling a pressure switch, it is very important to verify that
the plant in which the pressure switch is mounted has previously beenput
apart from pressure.
Equipment for explosive atmospheres ATEX must be implemented only by
qualified personnel in the field.