Ametek Echotel 961 Safety Manual
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Ametek Echotel 961 Safety Manual

Ultrasonic level switches
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Model 961
This manual complements and is intended to be used
with the Magnetrol Echotel
Single and Dual Point Level Switches Installation and
Operating Manual (Bulletin 51-646).
Application
Echotel
pulsed signal technology to detect high, low, or du-
al-point level in a broad range of liquid media applica-
tions. The advanced self-test technology provides reli-
ability 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
Model 962
• Reliable liquid level measurement independent of
changes in media density, conductivity, or temperature
• 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 hazardous location certifications
• Suitable for Safety Integrity Level (SIL) 2 loops
SIL Safety Manual for
Echotel
Model 961/962
®
Ultrasonic Level Switches
®
Model 961/962 ultrasonic level switches utilize
®
Model 961/962 Ultrasonic

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Summary of Contents for Ametek Echotel 961

  • Page 1 SIL Safety Manual for Echotel Model 961/962 ® 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). Application 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 6.0 Recurrent Function Tests .

  • 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 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 ametek-measurement.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 man- ual 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 fol- lowing items are recommended: •...

  • Page 7: Configuration

    Configuration Refer to Section 2.5 in the Echotel Model 961/962 Ultra- sonic Level Switches Installation and Operating Manual (Bulletin 51-646) for complete configuration instructions. 5.5.1 Time-Delay Potentiometer The time-delay potentiometer is used in applications where turbulence or splashing may cause false level alarm.

  • Page 8: Loop Test Push Button

    5.5.6 Loop Test Push Button The loop test push button is used to manually test the loop current output. For Model 961, pressing the loop test push button reverses the output from 8 mA to 16 mA or from 16 mA to 8 mA. For Model 962, pressing the loop test push button changes the output from 8 mA to 12 mA, 12 mA to 16 mA, or 16 mA to 8 mA.

  • 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 AMETEK LMS 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 pro- cess 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 pro- cess 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). 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 pro- cess 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 pro- cess 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: Appendices

    Appendices SIL Summary The Echotel Model 961/962 random capability infor- ® mation is summarized in Tables 6 and 7. FIT = Failure in Time (1×10E-9 failures per hour). Table 7 Relay Output Version Model 961 Model 961 Model 961 Model 961 Model 962 Model 962 Product...

  • Page 20: Fmeda Report

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

  • Page 21: 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 lifetime, 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 No claims for misapplication, labor, direct or consequential damage will be allowed. 705 Enterprise Street • Aurora, Illinois 60504-8149 USA 630.969.4000 • info.magnetrol@ametek.com • ametek-measurement.com BULLETIN: 51-650.3 EFFECTIVE: March 2024 Copyright © 2024 AMETEK Magnetrol USA, LLC SUPERSEDES: February 2019...

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Echotel 962

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