Ametek Magnetrol E4 Modulevel Safety Manual
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Ametek Magnetrol E4 Modulevel Safety Manual

Ametek Magnetrol E4 Modulevel Safety Manual

Liquid level displacer transmitter
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Functional Safety Manual
SIL Safety Manual for
E4 Modulevel
Liquid Level
Displacer Transmitter
This manual complements and is intended to be used with
the E4 Modulevel
Installation and Operating manual
®
(Bulletin 48-636).
pplication
The E4 Modulevel
®
Liquid Level Displacer Transmitter
can be applied in most process or storage vessels, bridles,
bypass chambers, interfaces, sumps, and pits up to the
unit pressure and temperature ratings. The E4
Modulevel can be used in liquids, clean or dirty, light
hydrocarbons to heavy acids (SG=0.23 to 2.20) to meet
the safety system requirements of IEC 61508.
Benefits
The E4 Modulevel provides the following benefits to
your operation:
• Suitable for use to SIL 2 as standalone device inde-
pendently assessed (hardware assessment) by exida as
per IEC 61508 / IEC 61511.
• Capable of outputting total level, interface level, or
specific gravity.
• Range Spring/LVDT design yields performance bene-
fits over traditional torque tube displacer transmitters.
• Full range of hazardous location approvals with inter-
national certificates.

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Summary of Contents for Ametek Magnetrol E4 Modulevel

  • Page 1 SIL Safety Manual for E4 Modulevel Functional Safety Manual Liquid Level Displacer Transmitter This manual complements and is intended to be used with the E4 Modulevel Installation and Operating manual ® (Bulletin 48-636). pplication The E4 Modulevel ® Liquid Level Displacer Transmitter can be applied in most process or storage vessels, bridles, bypass chambers, interfaces, sumps, and pits up to the unit pressure and temperature ratings.

  • Page 2: Table Of Contents

    E4 Modulevel Displacer Level Transmitter ® SIL Safety Manual Table of Contents 1.0 Introduction ..............3 5.6 Configuration ............7 1.1 Product Description ..........3 5.6.1 General............7 1.2 Theory of Operation..........3 5.6.2 Write Protecting / Locking ......7 1.3 Determining Safety Integrity Level (SIL) ....4 5.7 Site Acceptance Testing ..........7 2.0 Level Measuring System ..........4 5.8 Recording results............7...

  • Page 3: Introduction

    Introduction Product Description The E4 Modulevel is a loop-powered, two-wire, 24 VDC level transmitter that uses simple buoyancy principles in combination with a precision range spring and a highly accurate LVDT (linear variable differential transformer) to detect and convert liquid level changes into a stable 4–20 mA output signal.

  • Page 4: Determining Safety Integrity Level (Sil)

    Table 1 Determining Safety Integrity Level (SIL) SIL vs. PFD avg Tables 1 and 2 define the criteria for the achievable SIL Safety Target Average Integrity Level probability of failure against the target mode of operation in Demand Mode (SIL) on demand (PFDavg) Operation.

  • Page 5: Miscellaneous Electrical Considerations

    Miscellaneous Electrical Considerations 2.2.1 Pollution Degree 2 The E4 Modulevel Level Displacer Transmitter is designed for use in Category II, Pollution Degree 2 installations. A nonconductive pollution of the sort where occasionally a temporary conductivity caused by condensation must be expected.

  • Page 6: Instructions

    Instructions Systematic Limitations The following application and environmental limitations must be observed to avoid systematic failures. 5.1.1 Application The E4 Modulevel transmitter should be located for easy access for service, configuration, and monitoring. There should be sufficient headroom to allow installation and removal of the transmitter head, and, in cases of tank top configuration, the displacer.

  • Page 7: Storage

    Storage The E4 Modulevel should be stored in its original shipping box and not be subjected to temperatures outside the stor- age temperature range -40 to +85 °C (-50 to +185 °F), as shown in the E4 Modulevel Installation and Operating Manual (Bulletin 48-636).

  • Page 8: Maintenance

    Maintenance The only maintenance required is the proof test. • Report all failures to the factory. • Firmware can only be upgraded by factory personnel. 5.9.1 Diagnostics Internal diagnostic testing does a complete cycle about 16 times per second (every 60 ms). A message will appear and the output current will be driven to 3.6 or 22 mA (cus- tomer dependent) upon detection of a fault.

  • Page 9: Recording Results

    6.1.3 Recording results Record the results of the Proof Test for future reference. 6.1.4 Proof Test Procedure A suggested proof test is described below. 1. Bypass the safety function and take appropriate action to avoid a false trip. 2. Use HART communications to retrieve any diagnostics and take appropriate action.

  • Page 10: Appendices

    ppendices FMED Report: Exida Management Summary 48-652 E4 Modulevel Displacer Level Transmitter - SIL...

  • Page 11: Specific Model E4 Values

    Specific E4 Modulevel Values Failure rates for static applications with good maintenance assumptions in FIT @ SSI=2 according to IEC 61508. λ λ λ λ Application/ Device/Configuration E4 Local 2194 E4 Remote 2224 Where: λ = Fail Safe Detected λ = Fail Safe Undetected λ...
  • Page 12 Safety The SIL values in this document are based on an Electrical/Electronic/Programmable Electronic Safety FMEDA analysis using exida’s SILVER Tool. AMETEK Related Systems” LMS accepts no liability whatsoever for the use of these numbers or for the correctness of the standards on which IEC 60654-1: 1993-02, second edition, “Industrial-...

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