Horizon TM Model 704
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Catalog excerpts

Horizon TM Model 704 - 1

Guided Wave Radar Level Transmitter DESCRIPTION The Horizon® 704 is a loop-powered, 24 V DC liquid-level transmitter based on the revolutionary Guided Wave Radar (GWR) technology. The electronics of the Horizon® 704 is integral mount on the GWR probe and allows local conguration via a 3 pushbutton keypad / LCD screen. The Horizon® 704 electronics are compatible with different types of GWR probes each encompassing different application challenges (coaxial or twin rod types). The aluminium or Lexan® housing can be removed for service under process conditions. Measures «REAL LEVEL» Horizon 704 with coaxial GWR probe * “REAL LEVEL”, measurement not affected by changing media variables eg. dielectrics, pressure, density, pH, viscosity, ... * Easy bench conguration - no need for level simulation. * 2-line x 8-character LCD / 3-pushbutton keypad or blind transmitter. * Two-wire, intrinsically safe loop powered level transmitter. * Housing can be easily removed without depressurizing the vessel. ® ® * HART /AMS digital communication. * Max process temperature: 200 °C (400 °F). * Max process pressure: 70 bar (1000 psi). * 4-20 mA output (meets NAMUR NE 43). * Integral mount electronics. MEDIA: Liquids or slurries; hydrocarbons to water-based media (dielectric 1,7 - 100). VESSELS: Most process or storage vessels up to rated probe temperature and pressure. CONDITIONS: All level measurement and control applications including process conditions exhibiting visible vapors, foam, coating / build up, surface agitation, turbulence and varying dielectric media or specic gravity. Agency Approval ATEX II 1 G Ex ia IIC T4 Ga, intrinsically safe FM/CSA Russian Authorisation Standards Other approvals are available, consult factory for more details Consult factory for proper model numbers and classications Horizon Guided Wave Radar is based upon the technology of TDR (Time Domain Reectometry). TDR utilizes pulses of electromagnetic energy, which are transmitted down a probe. When a pulse reaches a liquid surface that has a higher dielectric than the air/vapor in which it is travelling, the pulse is reected. An ultra high-speed timing circuit precisely measures the transit time and provides an accurate measure of the liquid level. Reected Pulse Transmitted Pulse

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Horizon TM Model 704 - 2

PROBE OVERVIEW Choosing the proper Guided Wave Radar (GWR) probe is the most important decision in the application process. The probe configuration establishes fundamental performance characteristics. Coaxial and twin rod are the 2 basic configurations used today; each with specific strengths and weaknesses. COAXIAL TYPE GWR PROBE signal propagation Ideally suited for: - media ≥ 1,7 - mounting in by-pass cages - most efficient GWR probe Beware of: - clogging / buid up inside coaxial tube (max 500 cP) TWIN ROD TYPE GWR PROBE signal propagation Ideally suited for: - media ≥ 2,5 - allows moderate...

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Horizon TM Model 704 - 3

A complete measuring system consists of: 1. Horizon® 704 transmitter head/electronics 2. Horizon® 704 GWR probe 1. Order code for HORIZON 704 transmitter head/electronics BASIC MODEL NUMBER Horizon 704 guided wave radar transmitter 4-20 mA with HART® communication 4-20 mA only (requires local display and keypad - Accessories code A) MENU LANGUAGE (Hart® communication is only available in English language) English Spanish French German Plug in digital display and keypad Blind transmitter (no display/keypad) – only available for units with HART® communication MOUNTING/APPROVAL Integral mount,...

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Horizon TM Model 704 - 4

High level shutdown / Overfill protection Special consideration is necessary in any application where guided wave radar is to be used for high level shutdown / overfill protection. To ensure proper measurement, the guided wave radar probe should be installed so the maximum overfill level is a minimum of 150 mm (6") (for 7MB only) below the process connection. This may include utilizing a nozzle or spool piece to raise the probe. No special precautions are required for the 7MR probe. 7MR GWR probe only max level Probe Insertion Length 1" BSP (G 1") Process Conn. Probe Insertion Length Probe...

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Horizon TM Model 704 - 5

BASIC MODEL NUMBER complete order code for HORIZON 704 Coaxial or Twin Rod GWR probe ■>- X = product with a specific customer requirement

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Horizon TM Model 704 - 6

7MB probes ® See graphs. ® Bridging is defined as continuous accumulation of material between the probe elements. ® Transition Zone (zone with reduced accuracy) is dielectric dependent; Er = dielectric permitivity. It is recommended to set 4-20 mA signal outside transition zones.

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Horizon TM Model 704 - 8

QUALITY ASSURANCE - ISO 9001:2008 THE QUALITY ASSURANCE SYSTEM IN PLACE AT MAGNETROL GUARANTEES THE HIGHEST LEVEL OF QUALITY DURING THE DESIGN, THE CONSTRUCTION AND THE SERVICE OF CONTROLS. OUR QUALITY ASSURANCE SYSTEM IS APPROVED AND CERTIFIED TO ISO 9001:2008 AND OUR TOTAL COMPANY IS COMMITTED TO PROVIDING FULL CUSTOMER SATISFACTION BOTH IN QUALITY PRODUCTS AND QUALITY SERVICE. PRODUCT WARRANTY ALL MAGNETROL ELECTRONIC AND ULTRASONIC LEVEL CONTROLS ARE WARRANTED FREE OF DEFECTS IN MATERIALS AND WORKMANSHIP FOR ONE FULL YEAR FROM THE DATE OF ORIGINAL FACTORY SHIPMENT. IF RETURNED WITHIN...

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