Group: AMETEK
Catalog excerpts
Eclipse® Model 706 High Performance Guided Wave Radar Level Transmitter DESCRIPTION The new Eclipse® Model 706 High Performance Transmitter is a loop-powered, 24 VDC level transmitter that is based upon the proven and accepted technology of Guided Wave Radar (GWR). Encompassing a number of significant engineering accomplishments, this leading edge level transmitter is designed to provide measurement performance well beyond that of many of the more traditional technologies. Measures Level, Interface, Volume and Flow Utilizing “diode switching” technology, along with the most comprehensive probe offering on the market, this single transmitter can be used in a wide variety of applications ranging from very light hydrocarbons to waterbased media. The innovative angled, dual compartment enclosure is now a common sight in the industry. This enclosure, first brought to the industry by Magnetrol® in 1998, is angled to maximize ease of wiring, configuration, and viewing of the versatile graphic LCD display. One universal Model 706 transmitter can be used and interchanged with all probe types, and offers enhanced reliability as it is suitable for use in critical SIL 2 hardware safety loops. The ECLIPSE Model 706 supports both the FDT/DTM and Enhanced DD (EDDL) standards, which allow viewing of valuable configuration and diagnostic information such as the echo curve in tools such as PACTware ™, AMS Device Manager, and various HART ® Field Communicators. APPLICATIONS MEDIA: Liquids, solids, or slurries; hydrocarbons to waterbased media (Dielectric Constant εr = 1.2–100) 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, surface agitation, bubbling or boiling, high fill/empty rates, low level and varying dielectric media or specific gravity.
Open the catalog to page 1FEATURES • Multivariable, two-wire, 24 VDC loop-powered transmitter for level, interface, volume, or flow. • Diode switching technology offers best-in-class signal strength and signal-to-noise ratio (SNR) resulting in enhanced capability in difficult low dielectric applications. • Level measurement not affected by changing media characteristics. • No need to move levels for calibration. • Overfill Capable probes allow for “true level” measurement all the way up to the process seal, without the need for special algorithms. • 4-button keypad and graphic LCD display allow for convenient...
Open the catalog to page 2EMULSION LAYERS OVERFILL CAPABILITY As emulsion layers, also called “rag layers,” can decrease the strength of the reflected signal in an interface application, GWR transmitters are typically recommended for applications that have clean, distinct layers. Although agencies like WHG or VLAREM certify Overfill proof protection, defined as the tested, reliable operation when the transmitter is used as overfill alarm, it is assumed in their analysis that the installation is designed in such a way that the vessel or side mounted cage cannot physically overfill. However, the ECLIPSE Model 706,...
Open the catalog to page 3PROBE THREE With one basic ECLIPSE Model 706 transmitter that operates with all probes, choosing the proper Guided Wave Radar (GWR) probe is the most important decision in the application process. The probe configuration establishes fundamental performance characteristics. All ECLIPSE Model 706 probes can be described by three basic configurations: • Coaxial Each of these probe configurations has specific strengths and weaknesses. Although there can be overlap, and different probes can certainly be used in similar applications, it is important to understand their basic differences so that...
Open the catalog to page 4PROBE THREE OPTIONAL FLUSHING CONNECTION The maintenance of coaxial GWR probes in applications suffering from buildup or crystallization can be significantly improved by using an optional flushing connection. This flushing connection is a metal extension with a port welded above the process connection. The port allows the user to purge the inside of the coaxial GWR probe during routine maintenance. Note: The best approach to eliminate the effects of condensation or crystallization is to install adequate insulation or heat tracing (steam or electrical). A flushing connection is no substitute...
Open the catalog to page 5PROBE THREE TWIN CABLE FLEXIBLE PROBES The relationship of the Twin Cable probe design to a coaxial probe design is similar to that of older, twin-lead, antenna lead-in to modern, coaxial cable. 300-ohm twinlead cable simply does not have the efficiency of 75-ohm coaxial cable, making the parallel conductor design less sensitive than the concentric coaxial. See Figure 2. This translates into Twin Cable GWR probes having the ability to measure dielectrics down to εr ≥1.7. Figure 3 shows the single element design and how the electromagnetic pulse effectively expands into a teardrop shape as...
Open the catalog to page 6GUIDE TWIN CABLE GWR PROBE signal propagation SINGLE ROD/CABLE PROBE signal propagation signal propagation end view GWR Description Probe¿ Max. Overfill Vacuum ƒ Pressure Safe Coaxial GWR Probes—Liquids Standard Level/Interface Tank/Chamber ε 1.4–100 -40° to +400° F r Temperature (-40° to +200° C) High -320° to +400° F ε 1.4–100 (-196° to +200° C) Pressure Level/Interface Tank/Chamber r High Temp./ Level/Interface Tank/Chamber ε 1.4–100 -320° to +850° F r High Press. (-196° to +450° C) Steam Saturated -40° to +650° F Tank/Chamber εr 10–100 (-40° to +345° C) Probe Steam Standard Temperature...
Open the catalog to page 7FUNCTIONAL/PHYSICAL System Design Measurement Principle Guided Wave Radar based on Time Domain Reflectometry (TDR) Input Measured Variable Level, as determined by GWR time of flight 6 inches to 100 feet (15 cm to 30 m); Model 7yS Probe 20 feet (610 cm) max. Output Type 4 to 20 mA with HART: 3.8 mA to 20.5 mA useable (per NAMUR NE43) FOUNDATION™ fieldbus: H1 (ITK Ver. 6.1.1) Modbus Analog: Digital Display: Loop Resistance Diagnostic Alarm Selectable: 3.6 mA, 22 mA (meets requirements of NAMUR NE 43), or HOLD last output Diagnostic Indication Meets requirements of NAMUR NE107 User Interface...
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