KROHNE H250 M40 NEPSI Ex d-Ex t - Manual (Page 12)

3
INSTALLATION
12
H250 M40
www.krohne.com 06/2013 - 4002868601 MA H250-M40-NEPSI-Ex-d-R01-
Installation
3.1 Installation
Installation and setup must be carried out according to the applicable installation installation
standards 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 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.
Take special note of the installation position for the H250/H/... with horizontal flow
direction:
In order to comply with thermal parameters and measuring accuracy, flowmeters for horizontal
installation are to be installed in the pipeline so that the display is located on the side of the
measuring tube. The maximum product and ambient temperatures indicated as well as the
measuring accuracy are based on lateral installation of the display.
3.2 Special conditions
Equipotential bonding
Variable area flowmeters must be included in the equipotential bonding of the hazardous area.
Electronics compartment lock
Lock the dustproof and/or flameproof electronics compartment of the variable area flowmeter
during operation. First tighten the cover by hand. Then tighten the cover again by about 90°. The
cover for the electronics compartment is secured by means of a lock. Use an WS3 Allen key to
turn the screw.
No waiting period is necessary prior to opening the electronics compartment.
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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