KROHNE DW 181-182-183-184 ATEX EN - Manual (Page 3)

GENERAL SAFETY INFORMATION
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DW 18 SERIES
www.krohne.com 11/2011 - 4001528201 - AD ATEX DW181-184 R01 en
1.1 Scope
These instructions are applicable only to devices that have one of the two application options for
use in hazardous areas (intrinsically-safe and explosion-proof devices). For all other data, use
the Quick Start and Handbook for the DW 18 series flow switch. If you do not have these
documents, please contact the nearest sales office or download them from the website
www.krohne.com.
1.2 Device description
DW 181 - 184 flow switches are mechanical devices that use a hinged, spring-loaded metal disc
to measure the flow rate of homogenous, clean liquids. Adjustable switches in the device
operate an alarm when you have the correct flow rate or velocity.
Several variants (DW181, DW182 etc.) are available for a wide range of pipe diameters. Each
variant has display and application options.
The flow switch is approved for use in potentially explosive atmospheres when equipped with the
appropriate options.
1.3 Standards and approvals
The certificate is given on the CD-ROM supplied with the device. You can also download the
certificate from our internet site.
WARNING!
Installation, commissioning and maintenance may only be carried out by "Personnel trained in
explosion protection".
INFORMATION!
The information in this ATEX supplement only contains the data applicable to explosion
protection. The technical data in the installation and operating manual for the non-Ex version
shall be valid in its current version, provided that they are not rendered invalid or are replaced by
this ATEX supplement.
DANGER!
In compliance with European Directive 94/9/EC (ATEX 100a), the ATEX version of the device
described in these Supplementary Instructions conforms to European Standards EN 60079-
0:2009, EN 60079-1:2007, EN 60079-11:2007, prEN 60079-11:2011, EN 60079-31:2009,
EN 13463-1:2009 and EN 13463-5:2004. The Ex ia, Ex d and Ex c versions are certified for use in
hazardous areas by INERIS under INERIS 03ATEX0045 X.
WARNING!
Carefully read the ATEX approval certificate. Obey the boundary conditions.