WIKA CPT-2 Series Safety Manual
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WIKA CPT-2 Series Safety Manual

4...20 ma/hart - two-wire and slave sensors with sil qualification
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Safety Manual
CPT-2x, IPT-2x
4 ... 20 mA/HART - two-wire
and slave sensors
With SIL qualification
CPT-2x, IPT-2x

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Summary of Contents for WIKA CPT-2 Series

  • Page 1 Safety Manual CPT-2x, IPT-2x 4 … 20 mA/HART - two-wire and slave sensors With SIL qualification CPT-2x, IPT-2x...

  • Page 2: Table Of Contents

    Contents Contents Document language ........................ 3 Scope ............................4 Instrument version ......................4 Area of application ......................4 SIL conformity ........................5 Planning ............................ 6 Safety function ......................... 6 Safe state ......................... 6 Prerequisites for operation ....................6 Safety-related characteristics....................7 Characteristics acc.

  • Page 3: Document Language

    1 Document language Document language Das vorliegende Safety Manual für Funktionale Sicherheit ist verfügbar in den Sprachen Deutsch, Englisch, Französisch und Russisch. The current Safety Manual for Functional Safety is available in German, English, French and Russian language. Le présent Safety Manual de sécurité fonctionnelle est disponible dans les langues suivantes: allemand, anglais, français et russe.

  • Page 4: Scope

    2 Scope Scope Instrument version This safety manual applies to pressure transmitters CPT-2x, IPT-2x CPT-2x, IPT-2x Slave-Sensor Electronics types: • Two-wire 4 … 20 mA/HART with SIL qualification • Two-wire 4 … 20 mA/HART with SIL qualification and supplemen- tary electronics "Additional current output 4 … 20 mA" •...

  • Page 5: Sil Conformity

    2 Scope SIL conformity The SIL conformity was independently judged and certified by the TÜV Rheinland according to IEC 61508:2010 (Ed.2). The certificate is valid for the entire service life of all instruments that were sold before the certificate expired! Verification documents see appendix Safety Manual - CPT-2x, IPT-2x...

  • Page 6: Planning

    3 Planning Planning Safety function Safety function The sensor generates on its current output a signal between 3.8 mA and 20.5 mA corresponding to the process variable. This analogue signal is fed to a connected processing system to monitor the follow- ing conditions: •...

  • Page 7: Safety-Related Characteristics

    4 Safety-related characteristics Safety-related characteristics Characteristics acc. to IEC 61508 for process pressure measurement or hydrostatic level measurement CPT-2x, IPT-2x Parameter Value Safety Integrity Level SIL2 in single-channel architecture SIL3 in multiple channel architecture Hardware fault tolerance HFT = 0 Instrument type Type B Mode...

  • Page 8: Characteristics Acc. To Iso 13849-1 For Process Pressure Measurement Or Hydrostatic Level Measurement

    4 Safety-related characteristics Parameter Value Hardware fault tolerance HFT = 0 Instrument type Type B Mode Low demand mode, High demand mode > 90 % MTBF 0.39 x 10 h (44 years) Diagnostic test interval < 30 min Failure rates λ...

  • Page 9: Supplementary Information

    4 Safety-related characteristics Device combination consisting of CPT-2x or Parameter Value IPT-2x MTTFd 73 years 96 % Performance Level 6.33 x 10 Supplementary information Determination of the The failure rates of the instruments were determined by an FMEDA failure rates according to IEC 61508.
  • Page 10 4 Safety-related characteristics Multiple channel archi- Due to the systematic capability SC3, this instrument can also be tecture used in multiple channel systems up to SIL3, also with a homogene- ously redundant configuration. The safety-related characteristics must be calculated especially for the selected structure of the measuring chain using the stated failure rates.

  • Page 11: Setup

    5 Setup Setup General information Mounting and installation Take note of the mounting and installation instructions in the operating instructions manual. Setup must be carried out under process conditions. Instrument parameter adjustment Tools The following adjustment units are permitted for parameterization of the safety function: •...
  • Page 12 5 Setup Warning: Unsafe device When adjustment is unlocked, the safety function must be considered status as unreliable. This applies until the parameters are verified and the adjustment is locked again. If the parameter adjustment process is not carried out completely, the device statuses described in the oper- ating instructions must be taken into consideration.

  • Page 13: Diagnostics And Servicing

    6 Diagnostics and servicing Diagnostics and servicing Behaviour in case of failure Internal diagnosis The instrument permanently monitored by an internal diagnostic system. If a malfunction is detected, a failure signal will be outputted on the safety-relevant output (see section "Safe status"). The diagnosis interval is specified in chapter "Safety-related charac- teristics".

  • Page 14: Proof Test

    7 Proof test Proof test General information Objective To identify possible dangerous, undetected failures, the safety func- tion must be checked by a proof test at adequate intervals. It is the user's responsibility to choose the type of testing. The time intervals are determined by the selected PFD (see chapter "Safety-related characteristics").

  • Page 15: Test 2: With Check Of The Process Variable

    7 Proof test Proof Test Coverage See Safety-related characteristics Test 2: With check of the process variable • Conditions Instrument can remain in installed condition • Output signal corresponds to the assigned process variable • Device status in the menu Diagnosis: "OK" Procedure 1.

  • Page 16: Appendix A: Test Report

    8 Appendix A: Test report Appendix A: Test report Identification Company/Tester Plant/Instrument TAG Meas. loop TAG Instrument type/Order code Instrument serial number Date, setup Date of the last proof test Test reason/Test scope Setup without checking the process variable Setup with check of the process variable Proof test without checking the process variable Proof test with check of the process variable Mode...

  • Page 17: Appendix B: Term Definitions

    9 Appendix B: Term definitions 9 Appendix B: Term definitions Abbreviations Safety Integrity Level (SIL1, SIL2, SIL3, SIL4) Systematic Capability (SC1, SC2, SC3, SC4) Hardware Fault Tolerance Safe Failure Fraction Average Probability of dangerous Failure on Demand Average frequency of a dangerous failure per hour (Ed.2) FMEDA Failure Mode, Effects and Diagnostics Analysis Failure In Time (1 FIT = 1 failure/10 λ...

  • Page 18: 10 Supplement C: Sil Conformity

    10 Supplement C: SIL conformity 10 Supplement C: SIL conformity Safety Manual - CPT-2x, IPT-2x...
  • Page 19 10 Supplement C: SIL conformity Safety Manual - CPT-2x, IPT-2x...
  • Page 20 All statements concerning scope of delivery, application, practi- cal use and operating conditions of the sensors and processing systems correspond to the information available at the time of printing. WIKA Alexander Wiegand SE & Co. KG Alexander-Wiegand-Straße 30 63911 Klingenberg Germany...

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Ipt-2 series

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