KROHNE DW181, DW-182, DW-183, DW-184ATEX User Manual
Supplementary instructions
Supplementary instructions
DW 18 SERIES
DW 18 SERIES
DW 18 SERIESDW 18 SERIES
Supplementary instructions Supplementary instructions
Mechanical Flow Controller
Supplementary Instructions for ATEX applications
Supplementary Instructions for ATEX applications
Supplementary Instructions for ATEX applicationsSupplementary Instructions for ATEX applications
© KROHNE 11/2011 - 4001528201 - AD ATEX DW181-184 R01 en
CONTENTS
DW 18 SERIES
1 General safety information 3
1.1 Scope ................................................................................................................................ 3
1.2 Device description ............................................................................................................ 3
1.3 Standards and approvals.................................................................................................. 3
1.4 Device categories ............................................................................................................. 4
1.4.1 Ex c-approved devices ............................................................................................................ 4
1.4.2 Ex ia-approved devices ........................................................................................................... 4
1.4.3 Ex d- / Ex tb-approved devices ...............................................................................................4
1.4.4 Definitions of device categories.............................................................................................. 5
1.5 Equipment protection levels (EPL)................................................................................... 5
1.5.1 Ex ia-approved devices ........................................................................................................... 5
1.5.2 Ex d- / Ex tb-approved devices ...............................................................................................5
1.5.3 Definitions of equipment protection levels ............................................................................ 5
1.6 Nameplates ...................................................................................................................... 5
1.6.1 ATEX nameplates .................................................................................................................... 6
1.6.2 Other labels............................................................................................................................. 8
2 Installation 9
2.1 Special conditions for safe use ........................................................................................ 9
2.2 Operating conditions: ambient and process temperature ............................................ 10
3 Electrical connections 11
3.1 General notes ................................................................................................................. 11
3.2 Ex c equipment ............................................................................................................... 11
3.3 Ex ia equipment .............................................................................................................. 11
3.3.1 How to connect the electrical cables ................................................................................... 11
3.3.2 Maximum intrinsically-safe values for the electrical circuit............................................... 11
3.3.3 Electrical schematics............................................................................................................ 12
3.4 Ex d / Ex tb equipment.................................................................................................... 13
3.4.1 General notes........................................................................................................................ 13
3.4.2 How to connect the electrical cables ................................................................................... 13
3.4.3 Maximum switching capacity values for the electrical circuit............................................. 13
3.4.4 Electrical schematics............................................................................................................ 13
4 Start-up 14
5 Service 15
5.1 Periodic maintenance..................................................................................................... 15
5.2 Returning the device to the manufacturer..................................................................... 15
5.2.1 General information.............................................................................................................. 15
5.2.2 Form (for copying) to accompany a returned device............................................................ 16
6 Notes 17
2
www.krohne.com 11/2011 - 4001528201 - AD ATEX DW181-184 R01 en
DW 18 SERIES
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.
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.
1.2 Device description
GENERAL SAFETY INFORMATION 1
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
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 600790:2009, 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.
The certificate is given on the CD-ROM supplied with the device. You can also download the
certificate from our internet site.
www.krohne.com11/2011 - 4001528201 - AD ATEX DW181-184 R01 en
3
1 GENERAL SAFETY INFORMATION
1.4 Device categories
1.4.1 Ex c-approved devices
The Ex c-approved device does not have a switch option. It only has an indicator.
The Ex c-approved device is suitable for use in potentially explosive atmospheres of all
flammable substances in Apparatus Group IIC. It is certified for applications requiring Category
1 G (gases, vapours or mists) or 1 D (dust) equipment when fitted with the appropriate options.
1.4.2 Ex ia-approved devices
Ex ia-approved devices have these switch options:
• K1 (1 × N/C (normally closed) switch or 1 × N/O (normally open) switch)
• K2 (2 × N/C switches or 2 × N/O switches)
• K2 (1 × N/C and 1 × N/0 switches or 1 × N/O and 1 × N/C switches)
• K1 changeover (1 × 3-wire SPDT switch)
• K2 changeover (2 × 3-wire SPDT switches)
DW 18 SERIES
The Ex ia-approved device is suitable for use in potentially explosive atmospheres of all
flammable substances in Apparatus Groups IIC and IIIC. It is certified for applications requiring
Category 1 G (gases, vapours or mists), or 1 D (dust) equipment when fitted with the appropriate
options.
INFORMATION!
The mechanical part of the assembly is Ex c-approved.
1.4.3 Ex d- / Ex tb-approved devices
Ex d- / Ex tb-approved devices have these switch options:
• K1 (1 × N/C switch)
• K1 (1 × N/O switch)
• KV1 (1 × N/O switch with relay)
The Ex d- and Ex tb-approved devices are suitable for use in potentially explosive atmospheres
of all flammable substances in Apparatus Groups IIC and IIIC. It is certified for applications
requiring Category 1/2 G (gases, vapours or mists) or 1/2 D (dust) equipment when fitted with the
appropriate options.
INFORMATION!
The mechanical part of the assembly is Ex c-approved.
4
www.krohne.com 11/2011 - 4001528201 - AD ATEX DW181-184 R01 en
DW 18 SERIES
GENERAL SAFETY INFORMATION 1
1.4.4 Definitions of device categories
Category 1
Category 1
Category 1Category 1
The device is installed in hazardous areas requiring Category 1 G or 1 D equipment.
Category 1/2
Category 1/2
Category 1/2Category 1/2
The switch housing is installed in hazardous areas requiring Category 2 G or 2 D equipment. The
measuring tube is installed in hazardous areas requiring Category 1 G or 1 D equipment.
1.5 Equipment protection levels (EPL)
1.5.1 Ex ia-approved devices
The Ex ia-approved device is certified for applications for which an EPL of Ga or Da is necessary.
1.5.2 Ex d- / Ex tb-approved devices
The Ex d-approved device is suitable is certified for applications for which an EPL of Gb or Db is
necessary.
1.5.3 Definitions of equipment protection levels
EPL Ga or Da
EPL Ga or Da
EPL Ga or DaEPL Ga or Da
The device is installed in hazardous areas that must have equipment with a very high level of
protection. The device is not a source of ignition in usual conditions of operation or when
possible or unusual faults occur.
EPL Gb or Db
EPL Gb or Db
EPL Gb or DbEPL Gb or Db
The device is installed in hazardous areas that must have equipment with a high level of
protection. The device is not a source of ignition in usual conditions of operation or when
possible faults occur. It is possible that this does not include frequent faults.
1.6 Nameplates
INFORMATION!
Look at the device nameplate to ensure that the device is delivered according to your order.
Check for the correct supply voltage printed on the nameplate.
www.krohne.com11/2011 - 4001528201 - AD ATEX DW181-184 R01 en
5
1 GENERAL SAFETY INFORMATION
1.6.1 ATEX nameplates
Figure 1-1: Ex c nameplate
1 ATEX certification agency code
2 Year made
3 Gas group, equipment approval category (explosive atmosphere - gas or dust), types of device protection, temperature
classes (T6...T3), maximum surface temperature and degree of ingress protection (if fitted with the appropriate cable
glands)
DW 18 SERIES
Figure 1-2: Ex ia nameplate
1 ATEX certification agency code
2 Year made
3 Gas group, equipment approval category (explosive atmosphere - gas), types of device protection including apparatus
groups, temperature classes (T6...T3) and equipment protection level
4 Gas group, equipment category (explosive atmosphere - dust), types of device protection including apparatus groups,
maximum surface temperature, equipment protection level and degree of ingress protection (if fitted with the appropriate cable glands)
5 Mechanical parts only:
Mechanical parts only: Gas group, equipment approval category (explosive atmosphere - gas or dust), types of device
Mechanical parts only:Mechanical parts only:
protection, temperature classes (T6...T3), maximum surface temperature and degree of ingress protection (if fitted
with the appropriate cable glands)
6 Maximum intrinsically-safe values for the electrical circuit
7 Electrical schematic (type of switch, number of switches and switch position)
INFORMATION!
Cable entry data for Ex i-approved devices is given on the standard device nameplate.
½
Cable entry options: PG13.5, M20×1.5 or
NPT
6
www.krohne.com 11/2011 - 4001528201 - AD ATEX DW181-184 R01 en
Loading...