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355 数据表(PDF) 2 Page - Magnetrol International, Inc. |
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355 数据表(HTML) 2 Page - Magnetrol International, Inc. |
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2 / 6 page ![]() 355 Housing Covers TOP LEFT: Cast aluminum with a tempered glass window for XP approval. TOP RIGHT: Lexan® plastic with a transparent cover. Electronics Module ABOVE: Module as positioned in compartment shows LCD and four-button keypad. Housing Compartment Shown in aluminum; available in Lexan. Contains field wiring compartment and electronics. O-Ring Aluminum Housing: Viton® Lexan® Housing: Buna-N Echotel ® Model 355 is a two-wire, loop-powered, non-contact ultrasonic transmitter that performs liquid level, volume, and open channel flow measurement. A powerful 60 kHz ultrasonic transducer and advanced digital signal processing is featured to reliably measure out to a 20 foot (6 meter) maximum range. The Model 355 provides unsur- passed ease of configuration with either the menu-driven 4-pushbut- ton, 2-line × 16-character display, HART ® digital communications, or PACTware™. The latter enables a complete configuration via the local user interface, or remotely with the added capability of capturing echo waveforms, and viewing trend data, diagnostic conditions and all trans- mitter configuration parameters. Operating Principle Measurement is obtained by emitting an ultrasonic pulse from the transducer and measuring the time required for the echo to reflect from the liquid surface and return to the transducer. U L T R A S O N I C T R A N S M I T T E R The Model 355 with a Lexan® housing and polypropylene transducer; and a 355 with an XP aluminum housing and a Kynar® transducer. Piezoelectric Crystal Assembly Transducer Board Transducer Shown in Kynar; available in polypropylene. |
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