Magnetrol Echotel 962 Sil Safety Manual
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Magnetrol Echotel 962 Sil Safety Manual

Ultrasonic level switches
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Functional Safety Manual
Model 961
This manual complements and is intended to be used with
the Magnetrol Echotel
Dual Point Level Switches Installation and Operating Manual
(Bulletin 51-646).
pplication
Echotel
pulsed signal technology to detect high, low, or dual-
point level in a broad range of liquid media applications.
The advanced self-test technology provides reliability
and continuous testing of electronics, transducer, piezo-
electric crystals, and electromagnetic noise.
Benefits
The Echotel Model 961/962 ultrasonic level switches
provide the following benefits:
• Single- or dual-point liquid level measurement
• Adjustable time-delay for turbulent aerated liquids
• Reliable liquid level measurement independent of
changes in media density, conductivity, or temperature
Model 962
• Two-wire mA current shift and relay output options
• Relay output or mA current shift with separate
malfunction indication
• Integral or remote mount electronics
• Pulsed signal technology
• Extensive FM, CSA, ATEX and IEC explosion proof
and intrinsically safe approvals
• Suitable for Safety Integrity Level (SIL) 2 loops
SIL Safety Manual for
Echotel
Model 961/962
®
Ultrasonic
Level Switches
Model 961/962 Ultrasonic Single and
®
Model 961/962 ultrasonic level switches utilize
®

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Summary of Contents for Magnetrol Echotel 962

  • Page 1 Model 961/962 ® Functional Safety Manual Ultrasonic Level Switches This manual complements and is intended to be used with the Magnetrol Echotel Model 961/962 Ultrasonic Single and ® Dual Point Level Switches Installation and Operating Manual (Bulletin 51-646). pplication Echotel Model 961/962 ultrasonic level switches utilize ®...

  • Page 2: Table Of Contents

    Echotel Model 961/962 Ultrasonic Level Switches ® Table of Contents 1.0 Introduction ..............3 5.5.3 Malfunction Test Push Button......8 1.1 Product Description ..........3 5.5.4 High/Low DIP Switch ........8 1.2 Theory of Operation..........3 5.5.5 Independent/Joint DIP Switch.......8 1.2.1 Transducer Design..........3 5.5.6 Loop Test Push Button........8 1.2.2 Transducer Materials ........4 5.5.7 Fault Test Push Button ........8 1.3 Determining Safety Integrity Level (SIL) ....4...

  • Page 3: Introduction

    1.2.1 Transducer Design Magnetrol’s advanced transducer design performs in difficult process conditions. Model 961 has a tip-sensitive transducer with an arched gap increasing its performance in aerated or foamy liquids.

  • Page 4: Transducer Materials

    1.2.2 Transducer Materials A broad selection of transducer materials is available for the Model 961/962. Metallic transducers include 316 SS, Hastelloy ® C, and Monel ® . The 316 SS transducer has a NACE construction option for sour gas service, and can also be built per ASME B31.1 and B31.3 piping codes.

  • Page 5: Supplementary Documentation

    Version V2, Revision R0, August 17, 2018 NOTE: The Failure Modes, Effects, and Diagnostic Analysis (FMEDA) report can be found in the Downloads tab of the Echotel 961/962 site page on magnetrol.com. Instructions Systematic Limitations The following application and environmental limitations must be observed to avoid systematic failures.

  • Page 6: Skill Level Of Personnel

    Skill Level of Personnel Personnel following the procedures of this safety manual should have technical expertise equal to or greater than that of a qualified instrument technician. Necessary Tools No special equipment or tools are required to install Echotel Model 961/962 ultrasonic level switch. The following items are recommended: •...

  • Page 7: Hygienic-Specific Installation

    5.4.1 Hygienic-specific Installation The hygienic version of the Model 961 is available with a deep-drawn 304 stainless steel housing. A variety of hygienic process connections are offered for use in food and beverage, pharmaceutical, and biotechnology applications. These hygienic transducers have 3-A (Authorization #596), EHEDG certification (per TNO Report # V4772/01) and a 20 Ra finish providing a uniform and ultra-smooth surface that inhibits microbial growth.

  • Page 8: Malfunction Test Push Button

    5.5.3 Malfunction Test Push Button The malfunction test push button is used to manually test the SPDT malfunction relay and whatever is connected to the relay. Pressing and holding this push button for 2 seconds causes the SPDT relay to de-engage, indicating a fault condition.

  • Page 9: Site Acceptance Testing

    LOOP TEST 16 mA Worst-case internal fault detection time is 10 seconds. 5.7.2 Troubleshooting Report all failures to the MAGNETROL Technical Support Department. Refer to the Echotel Model 961/962 Ultrasonic Level Switches Installation and Operating Manual (Bulletin 51-646) for troubleshooting device errors.

  • Page 10: Recurrent Function Tests

    Recurrent Function Tests Proof Testing 6.1.1 Introduction Following are the procedures utilized to detect Dangerous Undetected (DU) failures. 6.1.2 Interval To maintain the appropriate Safety Integrity Level of a Safety Instrumented System, it is imperative that the entire system be tested at regular time intervals (shown as TI in the appropriate standards).
  • Page 11 Step Proof Test – Echotel Model 961 Loop Refer to the Model 961 installation and operation manual and the SIL Safety Manual (note the chart in section 2.5.2.4 of the I & O Manual). Bypass the PLC or take other action to avoid a false trip. Inspect the Unit in detail outside and inside for physical damage or evidence of environmental or process leaks a.) Inspect the exterior of the Unit housing.
  • Page 12 Step Proof Test – Echotel Model 961 Loop (continued) If the unit under test fails to respond to process level changes remove the unit from the process and bench test. a.) Remove the unit from the process. Inspect the ultrasound transducer for evidence of damage or coating buildup.
  • Page 13 Step Proof Test – Echotel Model 961 Relay Refer to the Model 961 installation and operation manual and the SIL Safety Manual (note the charts in section 2.5.1 of the I & O Manual). Bypass the PLC or take other action to avoid a false trip. Inspect the Unit in detail outside and inside for physical damage or evidence of environmental or process leaks.
  • Page 14 Step Proof Test – Echotel Model 961 Relay (continued) If the unit under test fails to respond to process level changes remove the unit from the process and bench test. a.) Remove the unit from the process. Inspect the ultrasound transducer for evidence of damage or coating buildup.
  • Page 15 Step Proof Test – Echotel Model 962 Loop Refer to the Model 962 installation and operation manual and the SIL Safety Manual (note the chart in section 2.5.4.4 of the I & O Manual).8p5 158 Bypass the PLC or take other action to avoid a false trip. Inspect the Unit in detail outside and inside for physical damage or evidence of environmental or process leaks.
  • Page 16 Step Proof Test – Echotel Model 962 Loop (continued) Move the process level to achieve three possible states: 1. both GAPs DRY, 2. one GAP DRY & one GAP WET, 3. Both GAPs WET. This test confirms operation with all GAP states. Confirm proper operation of the unit: WET/DRY GAP conditions;...
  • Page 17 Step Proof Test – Echotel Model 962 Relay Refer to the Model 962 installation and operation manual and the SIL Safety Manual (note the charts in section 2.5.3 of the I & O Manual). Bypass the PLC or take other action to avoid a false trip. Inspect the Unit in detail outside and inside for physical damage or evidence of environmental or process leaks.

  • Page 18: Proof Test Coverage

    Step Proof Test – Echotel Model 962 Relay (continued) If the unit under test fails to respond to process level changes remove the unit from the process and bench test. a.) Remove the unit from the process. Inspect the ultrasound transducer for evidence of damage or coating buildup.

  • Page 19: Ppendices

    ppendices SIL Summary The Echotel® Model 961/962 random capability informa- tion is summarized in Tables 6 and 7. FIT = Failure in Time (1×10E failures per hour). Table 6 Relay Output Version Model 961 Model 961 Model 962 Model 962 Product Dry is Safe Wet is Safe...

  • Page 20: Fmeda Report

    FMED Report 51-650 Model 961/962 Echotel SIL Safety Manual...

  • Page 21: Fmeda Report: Management Summary

    7.2.1 FMEDA Report: exida Management Summary 51-650 Model 961/962 Echotel SIL Safety Manual...
  • Page 22 51-650 Model 961/962 Echotel SIL Safety Manual...

  • Page 23: Lifetime Of Critical Components

    Lifetime of Critical Components According to Section 7.4.9.5 of IEC 61508-2, a useful life- time, based on experience, should be determined and used to replace equipment before the end of useful life. Although a constant failure rate is assumed by the exida FMEDA prediction method, this only applies provided that the useful lifetime* of components is not exceeded.
  • Page 24 705 Enterprise Street • Aurora, Illinois 60504-8149 • 630.969.4000 info@magnetrol.com • magnetrol.com Copyright © 2019 Magnetrol International, Incorporated Magnetrol, Magnetrol logotype, and Echotel are registered trademarks of Magnetrol International. Hastelloy® is a registered trademark of HAYNES INTERNATIONAL, INC. (DELAWARE CORPORATION). BULLETIN: 51-650.2 Monel®...

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