Magnetrol Echotel 961 Functional Safety Manual
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Magnetrol Echotel 961 Functional 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, dated October 2008 or later).
pplication
Echotel
pulsed signal technology to detect high, low, or dual-
point level in a broad range of liquid media applica-
tions. The advanced self-test technology provides relia-
bility and continuous testing of electronics, transducer,
piezoelectric 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
• Relay output or mA current shift with separate
malfunction indication
• Integral or remote mount electronics
• Pulsed signal technology
• Extensive FM, CSA, and ATEX 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 961

  • Page 1: Sil Safety Manual For 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, dated October 2008 or later).

  • Page 2: Table Of Contents

    Echotel Model 961/962 Ultrasonic Level Switches ® Table of Contents SIL Safety Manual for Model 961/962........1 5.6 Configuration............8 Echotel Model 961/962 Ultrasonic Level Switches...1 5.6.1 Time-delay Potentiometer......8 Application...............1 5.6.2 Level Test Push Button........8 Benefits................1 5.6.3 Malfunction Test Push Button......9 1.0 Introduction..............

  • Page 3: Introduction

    Introduction Product Description Echotel Model 961 and 962 ultrasonic level switches utilize pulsed signal technology to detect high, low, or dual point level in a broad range of liquid media applications. Model 961 is a single-point level switch. Model 962 is a dual-point switch used as a level controller or to control pumps in an auto-fill or auto-empty mode.

  • Page 4: Transducer Design

    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. Model 962 has a tip-sensitive lower gap and flow-through upper gap permitting separations of 125 inches (318 cm).

  • Page 5: Pplicable Models

    Echotel Model 961/962 SIL Safety Manual: • Echotel Model 961/962 Ultrasonic Single and Dual Point Level Switches Installation and Operating Manual • Magnetrol Model 961 AC/DC Ultrasonic Level Switch with Relay Output, Failure Modes, Effects, and Diagnostic Analysis • Magnetrol Model 961 Loop-Powered Ultrasonic Level Switch, Failure Modes, Effects, and Diagnostic Analysis •...

  • Page 6: Instructions

    Instructions Systematic Limitations The following application and environmental limitations must be observed to avoid systematic failures. 5.1.1 Application Locations The Model 961/962 ultrasonic level switch should be located for easy access for service, configuration, and monitoring. There should be sufficient headroom to allow installation and removal of the unit.

  • Page 7: Necessary Tools

    Necessary Tools High Alarm Fill Line No special equipment or tools are required to install Echotel Dual Point Alarm Model 961/962 ultrasonic level switch. The following items are recommended: • Wrenches, flange gaskets, and flange bolting appropriate for process connection(s) •...

  • Page 8: Hygienic-Specific Installation

    5.5.1 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 9: Malfunction Test Push Button

    5.6.3 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 10: Fault Test Push Button

    Complete a site acceptance test to ensure proper operation after installation and configuration. Results of site accept- ance testing should be recorded for future reference. Maintenance • Report all failures to Magnetrol. • Firmware can only be upgraded by factory personnel. 51-650 Echotel SIL Safety Manual...

  • Page 11: Diagnostics

    5.8.1 Diagnostics Model 961/962 has a unique diagnostics feature to assist in troubleshooting should a failure occur. A microprocessor in the electronics continuously monitors all self-test data. Should a fault occur, the microprocessor can determine whether the malfunction is due to the electronics, transducer, piezoelectric crystals, or the presence of environmental noise.

  • Page 12: Ppendices

    SIL Declaration of Conformity Functional safety according to IEC 61508. Magnetrol International, Incorporated, 705 Enterprise Street, Aurora, Illinois 60504 declares as the manufacturer, that the level switches: Echotel Model 961/962 Ultrasonic Single and ® Dual Point Level Switches are suitable for use in safety instrumented systems according...

  • Page 13: Fmeda Report Management Summary

    FMED Report Management Summary 6.2.1 Model 961 Loop-powered Level Switch The Model 961 ultrasonic level switch is a complex device classified as Type B according to IEC61508, having a hardware fault tolerance of 0. This 24 VDC loop-powered unit contains self diagnostics programmed to output either 3.6 mA or 22 mA during a failure state.

  • Page 14: Model 962 Loop-Powered Ultrasonic Level Switches

    6.2.3 Model 962 Loop-powered Ultrasonic Level Switches The Model 962 ultrasonic level switch is a complex device classified as Type B according to IEC61508, having a hardware fault tolerance of 0. This 24 VDC loop-powered unit contains self diagnostics programmed to output either 3.6 mA or 22 mA during a failure state.

  • Page 15: Report - Lifetime Of Critical Components

    Report - Lifetime of Critical Components According to Section 7.4 of IEC 61508-2, a useful lifetime, based on experience, should be assumed. Although a constant failure rate is assumed by the proba- bilistic estimation method, this only applies provided that the useful lifetime of components is not exceeded.
  • Page 16 61511-1 Mod)–Informative” Disclaimer The SIL values in this document are based on an FMEDA analysis using exida’s SILVER Tool. Magnetrol accepts no liability whatsoever for the use of these numbers of for the correctness of the standards on which the general calculation methods are based.

This manual is also suitable for:

Echotel 962

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