3
INSTALLATION
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DK37/M8 - H250/M8
www.krohne.com
11/2017 - 4002616802 - AD DK37 NEPSI Ex ia R02 en
3.1 Mounting
Mounting and setup must be carried out according to the applicable installation standards
(e.g. GB 3836.15) by qualified personnel trained in explosion protection. The information given in
the standard documentation and the supplementary instructions must be observed at all times.
Variable area flowmeters must be installed in such a way that
•
there is no danger from mechanical impact effects.
•
no external forces are affecting the indication unit.
•
the device is accessible for any necessary visual inspections and can be viewed from all sides.
•
the nameplate is clearly visible.
•
it can be operated from a location with secure footing.
3.2 Special conditions and requirements
Components made of titanium
Flow meter with process wetted parts made of titanium shall be installed such that an ignition
hazard due to friction or impact is minimized.
Electrostatic charge
When the surface of enclosure is non-metallic materials or covered with paint layer, friction
should be avoided in case there will cause the ignition by electrostatic accumulation.
Special requirements
•
Only be connected to the certified associated apparatus, the Flow meter could be used in the
explosive atmosphere. The connection should be complied whith the requirements of the
manual of the associated apparatus. The maximum values for connection to a certified
associated apparatus are shown in the section "Electrical data".
•
The correlation between the temperature classification and the permissible maximum
ambient temperature for limit switch is shown in the attachment to its individual certificate,
at the same time the permissible ambient temperature of the flow meter doesn't higher than
the less permissible maximum ambient temperature between the flow meter and the limit
switch at the same temperature classification.
•
Users are forbidden to change the configuration to ensure the explosion protection
performance of the equipment. Any faults shall be settled with experts from the
manufacturer.
•
During installation, operation and maintenance, users shall comply with the relevant
requirements of the product instruction manual,
GB3836.13-2013 "Explosive atmospheres - Part 13: Equipment repair, overhaul and
reclamation",
GB3836.15-2000 "Electrical apparatus for explosive gas atmospheres - Part 15: Electrical
installations in hazardous areas (other than mines)",
GB50257-2014 "Code for construction and acceptance of electric device for explosive
atmospheres and fire hazard electrical equipment installation engineering".
CAUTION!
The manufacturer is not liable for any damage resulting from improper use or use other than the
intended purpose. This applies in particular to hazards due to insufficient corrosion resistance
and suitability of the materials in contact with product.
