KROHNE H250 M10 ATEX II3D Ex t EN - Manual (Page 9)

INSTALLATION
3
9
H250 M10
www.krohne.com 03/2011 - 4001348101- MA H250/M10-Ex-II3G-AD R01 en
Installation
3.1 Installation
Installation and setup must be carried out according to the applicable installation installation
standards (e.g. EN 60079-14) by qualified personnel trained in explosion protection. The
information given in the Installation and Operation Instructions and the Supplementary
Installation and Operation Instructions must always be observed.
Variable area flowmeters must be installed in such a way that
• There is no danger from mechanical impact effects.
• There are no external forces affecting the indicator part.
• The device is accessible for any visual inspections that are necessary, 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
Cable entries / Blanking plugs Cable entries / Blanking plugs Cable entries / Blanking plugs Cable entries / Blanking plugs
The variable area flowmeter is optionally equipped with one conduit entry and one blind plug or
two conduit entries. These elements ensure protection against foreign bodies and water
(protection category) IP66 according to EN 60529 in the temperature range of T
amb
= -
40°C...+100°C / -40...+212°F. The conduit entries are sealed with a plug. The plugs should be
replaced with suitable connecting cables. The nominal diameter range of the conduit entries is
marked on the plugs.
A choice of the following nominal diameters is available:
• Plugs with marking 13,5: Nominal diameter 6...12 mm / 0.24...0.47 inch
• Plugs with marking 16: Nominal diameter10...14 mm / 0.39...0.55 inch
Electronics compartment lock Electronics compartment lock Electronics compartment lock Electronics compartment lock
Close the variable area flowmeter during operation. The cover for the electronics compartment
is secured by means of a lock. Use an SW3 Allen key to turn the screw.
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.
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