KROHNE DW 181-182-183-184 ATEX EN - Manual (Page 2)

CONTENTS
2 www.krohne.com 11/2011 - 4001528201 - AD ATEX DW181-184 R01 en
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