INSTALLATION
3
9
H250 M10
www.krohne.com
06/2012 - 4001058901- MA H250/M10-Ex-II2G-AD R02 en
Installation
3.1 Installation
Installation and setup must be carried out according to the applicable installation standards (e.g.
EN 60079-14) by qualified personnel trained in explosion protection. The information given in the
manuals and the supplementary instructions must be observed at all times.
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.
3.2 Special conditions
Equipotential bonding
Variable area flowmeters must be included in the equipotential bonding of the hazardous area.
Electronics compartment lock
The variable area flowmeter's flameproof electronics compartment must be locked during
operation. The cover of the electronics compartment is secured by a lock. An SW3 Allen screw is
used for the safety screw. With temperature classes T6 and T5, a waiting time of 8 minutes must
be observed prior to opening. For temperature classes T4...T1 the waiting time is not needed.
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.
AD_H250_M10_II2G_R02_en_058901_PRT.book Page 9 Tuesday, June 26, 2012 7:20 AM