Krohne OPTISWITCH 3x00C NAMUR SIL EN User Manual

Safety ManualOPTISWITCH series 3000- NAMUR

Overflow protection(max. operation)Dry run protection(min. operation)λsd12 FIT 36 FITλsu160 FIT 155 FITλdd390 FIT 366 FITλdu47 FIT 52 FITDCS7 % 19 %DCD

1 5 10TProof PFDavg1234Fig. 1: Chronological sequence of PFDavg(figures see above charts)1 PFDavg= 02 PFDavgafter 1 year3 PFDavgafter 5 years4 PFDavgaf

Subject to change without notice32742-EN-080414

Content1 Functional safety1.1 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31.2 Planning . . . . . . . . . . . . . . . . . . . .

1 Functional safety1.1 GeneralThis safety manual applies to measuring systems consisting ofthe vibrating level switch OPTISWITCH series 3000 withinteg

FIT Failure In Time (1 FIT = 1 failure/109h)MTBF Mean Time Between FailureMTTF Mean Time To FailureMTTR Mean Time To Repairl IEC 61508 (also available

The safe state depends on the mode:Overflow protection(max. operation)Dry run protection(min. operation)Vibrating element in safestatecovered uncovered

If the ratio of the internal diagnostics test rate of the measuringsystem to the demand rate exceeds the value 100, themeasuring system can be treated

The measuring system should be used appropriately takingpressure, temperature, density and chemical properties of themedium into account.The user-spec

An exchange of the electronics is easily possible and isdescribed in the operating instructions manual.If due to a detected failure the electronics or

This function test is triggered by an interruption of the supplycable for at least two seconds. Then a special warm-upreaction of the current output i