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  • Stainless Steel Bypass Level Indicators for applications up to 40 bar / 580 psi

    BM 26 BASIC/ADVANCEDBM 26 BASIC/ADVANCEDBM 26 BASIC/ADVANCEDBM 26 BASIC/ADVANCED HandbookHandbookHandbookHandbook

    KROHNE 10/2012 - 4000347004 - HB BM26 Basic/Adv R04 en

  • All rights reserved. It is prohibited to reproduce this documentation, or any part thereof, without

    the prior written authorisation of KROHNE Messtechnik GmbH.

    Subject to change without notice.

    2

    BM 26

    www.krohne.com 10/2012 - 4000347004 - HB BM26 Basic/Adv R04 en

    Copyright 2012 by

    KROHNE Messtechnik GmbH - Ludwig-Krohne-Str. 5 - 47058 Duisburg (Germany)

    : IMPRINT :::::::::::::::::::::::::::::::::::::::

  • CONTENTS

    3www.krohne.com10/2012 - 4000347004 - HB BM26 Basic/Adv R04 en

    BM 26 BASIC/ADVANCED

    1 Safety instructions 5

    1.1 Intended use ..................................................................................................................... 51.2 Certification ...................................................................................................................... 51.3 Safety instructions from the manufacturer ..................................................................... 6

    1.3.1 Disclaimer ............................................................................................................................... 61.3.2 Product liability and warranty ................................................................................................ 71.3.3 Information concerning the documentation........................................................................... 71.3.4 Warnings and symbols used................................................................................................... 8

    1.4 Safety instructions for the operator................................................................................. 8

    2 Device description 9

    2.1 Scope of delivery............................................................................................................... 92.2 Device description .......................................................................................................... 102.3 Nameplates .................................................................................................................... 11

    2.3.1 Visual Check.......................................................................................................................... 112.3.2 Nameplates........................................................................................................................... 112.3.3 Other device data .................................................................................................................. 14

    3 Installation 15

    3.1 Storage ........................................................................................................................... 153.2 Transportation ................................................................................................................ 163.3 Remove all packing before installation ......................................................................... 163.4 General requirements .................................................................................................... 18

    3.4.1 Pressure and temperature ranges....................................................................................... 183.4.2 How to attach the bypass level indicator to the tank ........................................................... 19

    3.5 Level indicator column................................................................................................... 213.6 Optional analog transmitter ........................................................................................... 223.7 Optional limit switch....................................................................................................... 233.8 Electromagnetic compatibility ....................................................................................... 26

    4 Electrical connections 27

    4.1 Optional analog transmitter ........................................................................................... 274.2 Optional limit switches ................................................................................................... 294.3 Protection category ........................................................................................................ 30

    5 Start-up 31

    5.1 Start-up checklist........................................................................................................... 315.2 Operating concept .......................................................................................................... 31

  • CONTENTS

    4 www.krohne.com 10/2012 - 4000347004 - HB BM26 Basic/Adv R04 en

    BM 26 BASIC/ADVANCED

    6 Operation 32

    6.1 Local display options ...................................................................................................... 326.1.1 Level indicator column ......................................................................................................... 326.1.2 Analog transmitter (option) .................................................................................................. 33

    6.2 Errors.............................................................................................................................. 376.2.1 Error indication ..................................................................................................................... 376.2.2 Error handling....................................................................................................................... 38

    7 Service 41

    7.1 Periodic maintenance..................................................................................................... 417.2 Keep the device clean..................................................................................................... 417.3 How to replace device components ............................................................................... 41

    7.3.1 Service warranty ................................................................................................................... 417.4 Availability of services .................................................................................................... 42

    7.4.1 General notes........................................................................................................................ 427.4.2 List of spare parts ................................................................................................................. 427.4.3 List of accessories ................................................................................................................ 43

    7.5 Availability of services .................................................................................................... 437.6 Returning the device to the manufacturer..................................................................... 44

    7.6.1 General information.............................................................................................................. 447.6.2 Form (for copying) to accompany a returned device............................................................ 45

    7.7 Disposal .......................................................................................................................... 45

    8 Technical data 46

    8.1 Measuring principle........................................................................................................ 468.2 Technical data: general information.............................................................................. 478.3 Technical data: optional analog transmitter.................................................................. 518.4 Technical data: optional limit switches.......................................................................... 568.5 Basic version: Dimensions and weights ........................................................................ 588.6 Advanced version: Dimensions and weights.................................................................. 668.7 Analog transmitter: Dimensions and weight ................................................................. 748.8 Support bracket option: Dimensions and weight........................................................... 758.9 Guidelines for maximum operating pressure................................................................ 768.10 Floats ............................................................................................................................ 78

    9 Appendix 79

    9.1 Liquid level offset: description....................................................................................... 799.2 Liquid level offset: correction data ................................................................................ 809.3 Glossary .......................................................................................................................... 839.4 Order code ...................................................................................................................... 849.5 Spare parts code ............................................................................................................ 92

    10 Notes 94

  • SAFETY INSTRUCTIONS 1

    5

    BM 26 BASIC/ADVANCED

    www.krohne.com10/2012 - 4000347004 - HB BM26 Basic/Adv R04 en

    1.1 Intended use

    This magnetic level indicator measures the level or volume of liquids.

    It is installed next to open or pressurized tanks. With the applicable options, it is resistant to difficult ser