KROHNE DW 18 Series Supplementary Instructions Manual
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KROHNE DW 18 Series Supplementary Instructions Manual

Mechanical flow controller
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DW 18 SERIES
DW 18 SERIES
DW 18 SERIES
DW 18 SERIES
Mechanical Flow Controller
Supplementary Instructions for ATEX applications
Supplementary Instructions for ATEX applications
Supplementary Instructions for ATEX applications
Supplementary Instructions for ATEX applications
© KROHNE 11/2011 - 4001528201 - AD ATEX DW181-184 R01 en
Supplementary instructions
Supplementary instructions
Supplementary instructions
Supplementary instructions

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Summary of Contents for KROHNE DW 18 Series

  • Page 1 Supplementary instructions Supplementary instructions Supplementary instructions Mechanical Flow Controller Supplementary Instructions for ATEX applications Supplementary Instructions for ATEX applications Supplementary Instructions for ATEX applications Supplementary Instructions for ATEX applications © KROHNE 11/2011 - 4001528201 - AD ATEX DW181-184 R01 en...

  • Page 2: Table Of Contents

    CONTENTS DW 18 SERIES 1 General safety information 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....................

  • Page 3: General Safety Information

    (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.

  • Page 4: Device Categories

    GENERAL SAFETY INFORMATION DW 18 SERIES 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.

  • Page 5: Definitions Of Device Categories

    GENERAL SAFETY INFORMATION DW 18 SERIES 1.4.4 Definitions of device categories Category 1 Category 1 Category 1 Category 1 The device is installed in hazardous areas requiring Category 1 G or 1 D equipment. Category 1/2 Category 1/2 Category 1/2 Category 1/2 The switch housing is installed in hazardous areas requiring Category 2 G or 2 D equipment.

  • Page 6: Atex Nameplates

    GENERAL SAFETY INFORMATION DW 18 SERIES 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...
  • Page 7 GENERAL SAFETY INFORMATION DW 18 SERIES Figure 1-3: Ex d nameplate 1 Limit switch code 2 Year made 3 ATEX certification agency code 4 Gas group, equipment approval category (explosive atmosphere - gas), types of device protection including apparatus groups, temperature classes (T6...T3) and equipment protection level...

  • Page 8: Other Labels

    GENERAL SAFETY INFORMATION DW 18 SERIES 1.6.2 Other labels ESD warning sticker PLASTIC PARTS WARNING: POTENTIAL ELECTROSTATIC HAZARD SEE INSTRUCTIONS Figure 1-4: ESD warning sticker (below the device nameplate) 1 Text: Plastic Parts 2 Text: Warning! Potential electrostatic hazard - see instructions...

  • Page 9: Installation

    INSTALLATION DW 18 SERIES 2.1 Special conditions for safe use WARNING! When you install the device, obey the conditions in the EC-Type Examination certificate. These conditions include: The special conditions for safe use. • The Essential Health and Safety Requirements.

  • Page 10: Operating Conditions: Ambient And Process Temperature

    INSTALLATION DW 18 SERIES 2.2 Operating conditions: ambient and process temperature The allowable ambient temperature and corresponding flange temperature range for the device depends on the equipment category, equipment protection level (EPL) and temperature classes marked on the nameplate. The equipment category, equipment protection level and temperature class give the ambient temperature and related process temperature ranges for the device.

  • Page 11: Electrical Connections

    ELECTRICAL CONNECTIONS DW 18 SERIES 3.1 General notes WARNING! • Use the applicable cable glands for the cable entry openings in the housing. If ambient temperature >70 C / >158 F, use heat-resistant cables, cable glands and cable • °...

  • Page 12: Electrical Schematics

    ELECTRICAL CONNECTIONS DW 18 SERIES 3.3.3 Electrical schematics Figure 3-1: Electrical schematics for Ex ia-approved equipment (switch options) 1 K1: 1 × N/O (normally open) switch 2 K1: 1 × N/C (normally closed) switch 3 K2: 2 × N/O switches 4 K2: 2 ×...

  • Page 13: Ex D / Ex Tb Equipment

    ELECTRICAL CONNECTIONS DW 18 SERIES 3.4 Ex d / Ex tb equipment 3.4.1 General notes DANGER! Do not open the housing while the device is energized. 3.4.2 How to connect the electrical cables INFORMATION! Cable entries are supplied on customer demand. If you supply the cable entries, this part must have a degree of ingress protection IP≥65 (EN 60529).

  • Page 14: Start-Up

    START-UP DW 18 SERIES Do a start-up check: • Are the wetted components (gasket, measuring tube and measuring disc) resistant to corrosion by the tank product? • Does the information given on the nameplate agree with the application? www.krohne.com 11/2011 - 4001528201 - AD ATEX DW181-184 R01 en...

  • Page 15: Service

    SERVICE DW 18 SERIES 5.1 Periodic maintenance DANGER! Make sure that maintenance operations agree with EN 60079-17: Explosive atmospheres - Part 17: Electrical installations inspection and maintenance. 5.2 Returning the device to the manufacturer 5.2.1 General information This device has been carefully manufactured and tested. If installed and operated in accordance with these operating instructions, it will rarely present any problems.

  • Page 16: Form (For Copying) To Accompany A Returned Device

    SERVICE DW 18 SERIES 5.2.2 Form (for copying) to accompany a returned device Company: Address: Department: Name: Tel. no.: Fax no.: Manufacturer's order no. or serial no.: The device has been operated with the following medium: This medium is: water-hazardous...

  • Page 17: Notes

    NOTES DW 18 SERIES 11/2011 - 4001528201 - AD ATEX DW181-184 R01 en www.krohne.com...
  • Page 18 NOTES DW 18 SERIES www.krohne.com 11/2011 - 4001528201 - AD ATEX DW181-184 R01 en...
  • Page 19 NOTES DW 18 SERIES 11/2011 - 4001528201 - AD ATEX DW181-184 R01 en www.krohne.com...
  • Page 20 Measuring systems for the oil and gas industry • Measuring systems for sea-going tankers Head Office KROHNE Messtechnik GmbH Ludwig-Krohne-Str. 5 D-47058 Duisburg (Germany) Tel.:+49 (0)203 301 0 Fax:+49 (0)203 301 10389 info@krohne.de The current list of all KROHNE contacts and addresses can be found at: www.krohne.com...

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