Operating instructions

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1. Application
The Ex-Pt 720 is a precise, robust and simple to operate temperature
measuring device for temperature measurements in explosion-
endangered areas of Zones 2 and 1 in accordance with Directive
1999/92/EC (ATEX 137) and Zone 2, 1 and 0 according to NEC
(FM-Marking).
2. Safety references
These safety instructions contain information and safety regulations that
must be followed to ensure safe and reliable operation of the unit under
the described conditions. Failure to follow the information and instructions
can have dangerous consequences or may contravene applicable regula-
tions.
Please take the time to carefully read through the operating manual and
safety instructions before you start using the unit!
In case of any doubt (in the form of translation or printing errors) the
German language operating instructions shall apply.
3. Malfunctioning and inadmissible operation
As soon as one suspects that the safety of the equipment is endangered,
it must be taken out of service and immediately removed from the Ex-area.
Precautions must be taken to prevent its unintentional reuse.
We recommend that the unit be returned to the manufacturer for checking.
For example, the safety of the unit could be endangered when:
- damage to the housing is visible.
- the unit was subjected to improper strain.
- the unit was incorrectly stored.
- the unit was damaged in transit.
- the lettering on the unit is unreadable.
- malfunctioning occurs.
- obviously incorrect measurements occur.
- measurements with the unit are no longer possible.
- the permissible limiting values were exceed.