KROHNE H250 M9 Safet V2 EN - Manual (Page 3)

INTRODUCTION
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3
H250 M9
www.krohne.com 06/2013 - 4000656702 MA H250-M9 SIL R03
Introduction
1.1 Fields of application
Measurements of volume flow rate of liquids, gases and vapor that shall meet the special safety
requirements according to IEC 61508.
The measuring unit meets the requirements regarding
• Functional safety in accordance with IEC 61508-2:2010 (Edition 2)
• EMC directive 2004/108/EC
• ATEX directive 94/9/EC
• PED directive 97/23/EC
For further information please refer to the CE declaration of conformity which is available at the
Download Center at www.krohne.com.
1.2 User benefits
Use for
• Volume flow monitoring
• Continuous measurement and local analog indication
• Easy commissioning
1.3 Relevant standards / literature
[N1] IEC 61508-2:2010 Functional Safety of Electrical/Electronic/Programmable Electronic
Safety-Related Systems
[N2] ISBN: 0471133019 John Wiley & Sons Electronic Components: Selection and Application
Guidelines by Victor Meeldijk
[N3] FMD-91, RAC 1991 Failure Mode / Mechanism Distributions
[N4] FMD-97, RAC 1997 Failure Mode / Mechanism Distributions
[N5] NPRD-95, RAC Non-electronic Parts - Reliability Data 1995
[N6] SN 29500 Failure rates of components
[N7] NSWC-98/LE1 Handbook of Reliability Prediction Procedures for Mechanical Equipment
[N8] IEC 60654-1:1993-02, second edition, Industrial-process measurement and control
equipment - operating conditions - Part 1: Climatic condition
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