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Magnetrol Echotel 961 Functional Safety Manual

Manual is about: Ultrasonic Single and Dual Point Level Switches

Summary of Echotel 961

  • Page 1

    Ultrasonic level switches sil safety manual for echotel ® model 961/962 application echotel ® model 961/962 ultrasonic level switches utilize 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...

  • Page 2: Echotel

    51-650 echotel sil safety manual table of contents sil safety manual for model 961/962....................................1 echotel model 961/962 ultrasonic level switches...........1 application.......................................................................1 benefits...........................

  • Page 3

    3 51-650 echotel sil safety manual 1.0 introduction 1.1 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...

  • Page 4

    4 51-650 echotel sil safety manual 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 ...

  • Page 5

    5 51-650 echotel sil safety manual 2.0 applicable models this manual is applicable to the following models of the echotel ultrasonic level switches with relay output or current shift output: • model 961 single-point level switches • model 962 dual-point level switches 3.0 mean time to repair (mttr) ...

  • Page 6

    6 51-650 echotel sil safety manual 5.0 instructions 5.1 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, c...

  • Page 7

    7 51-650 echotel sil safety manual 5.3 necessary tools no special equipment or tools are required to install echotel model 961/962 ultrasonic level switch. The following items are recommended: • wrenches, flange gaskets, and flange bolting appropriate for process connection(s) • screwdrivers and ass...

  • Page 8

    8 51-650 echotel sil safety manual 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...

  • Page 9

    9 51-650 echotel sil safety manual 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 faul...

  • Page 10

    10 51-650 echotel sil safety manual 5.6.7 fault test push button the fault test push button is used to manually change the ma values to that selected at the 22/3.6 dip switch. Pressing this push button for two seconds simulates a circuit test failure. The output goes to the selected fault current of...

  • Page 11

    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...

  • Page 12

    12 51-650 echotel sil safety manual 6.0 appendices 6.1 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 ultrason...

  • Page 13

    6.2 fmeda 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 eit...

  • Page 14

    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 dur...

  • Page 15

    6.3 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 ...

  • Page 16

    Bulletin: 51-650.0 effective: july 2010 service policy owners of magnetrol controls may request the return of a control or any part of a control for complete rebuilding or replacement. They will be rebuilt or replaced promptly. Controls returned under our service policy must be returned by prepaid t...