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Functional Safety Manual
M310/FSM, Rev AA
January 2012
Horizontal Float Switch
Contents
Introduction Scope and Purpose of the Safety Manual ...........................................................page 3
Skill Level Requirement .......................................................................................page 3
Terms, Abbreviations, And Acronyms..................................................................page 3
Documentation and Standards.............................................................................page 5
Product Description Level Switch Purpose ..........................................................................................page 6
Operation Principle ..............................................................................................page 6
Ordering Information............................................................................................page 7
Designing A Safety
Function Using The
Level Switch
Safety Function....................................................................................................page 8
Environmental Limits............................................................................................page 8
Application Limits.................................................................................................page 8
Design Verification ...............................................................................................page 8
SIL Capability.......................................................................................................page 9
Connection of the Level Switch to the SIS Logic Solver ....................................page 10
General Requirements.......................................................................................page 10
Installation And
Commissioning
Installation..........................................................................................................page 10
Physical Location And Placement......................................................................page 10
Electrical Connections .......................................................................................page 10
Operation And
Maintenance
Proof-test Requirement...................................................................................... page 11
Repair and Replacement ...................................................................................page 11
Notification Of Failures.......................................................................................page 11
Useful Lifetime Useful Life..........................................................................................................page 12
Proposed Proof-test
Procedure
Suggested Proof-test .........................................................................................page 13
Proof Test Coverage ..........................................................................................page 13
Level Switches Certified
to IEC 61508
Level Switches for General Purpose Applications (Stainless Steel Wetside).....page 14
Level Switches for General Purpose Applications (Stainless Steel Wetside).....page 14
Level Switches for General Purpose Applications (Aluminum Bronze Wetside)page 15