Product category:
Level and tank contents instrumentation
News Release from: Magnetrol International | Subject: Eclipse 705
Edited by the Processingtalk Editorial
Team on 06 February 2007
European type approval for Eclipse on
steam drums
The second generation Eclipse 705, 2-wire Guided Wave Radar from Magnetrol is type approved to the newest European norms for steam drums, as both a "primary safety " and "secondary safety" device
The second generation Eclipse 705, 2-wire Guided Wave Radar is type approved to the newest European norms for steam drums, EN 12952-11 (water tube boilers) and EN 12953-9 (shell type boilers) as both a "primary safety " and "secondary safety" device These norms complete the PED construction guidelines with functional directives, typical for use on steam drums
This article was originally published on Processingtalk on 22 May 2003 at 8.00am (UK)
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The Eclipse 705 has been type approved by the Dutch "Stoomwezen", for use on steam drums as a secondary safety device since 2002.
As a secondary safety device, Eclipse fulfills all general control functions on the steam drum; such as the controlling of the hot feed water to the boiler.
In its function of 'primary safety' device, Eclipse operates as a safety switch and turns off the boiler in a safe way in case an emergency / dangerous situation occurs.
Further reading
Selecting a radar level unit for the application
Radar (microwave based) level transmitters handle tough and changing process conditions, and applications are growing: how do you choose between the two types available?
Eclipse guided wave radar for solids
The Eclipse guided wave radar handles the most complex and extreme liquid level measurement applications: with single and dual flexible probes, it also measures solids with dielectrics down to 1.9
The number of primary and secondary safety devices on a steam drum depends on the type of boiler, the manning of the boiler (permanently manned, semi-manned or not manned at all), its process pressure, capacity, etc.
The Eclipse 705 combines two major advantages against the traditionally used transmitters; high reliability - repeatability and an efficient process seal.
The Eclipse uses the technology of Guided Wave Radar.
This measuring principle measures independently of the process parameters such as density, conductivity, dielectrics, pH, etc.
High pressure and temperature changes inside a boiler have an important impact on the accuracy and reliability of the traditional transmitters such as differential pressure, displacer and RF capacitance.
The process seal of the 7MS probe is specifically designed for use on saturated steam.
The dynamics of the seal take the sudden and aggressive changes of process pressure and temperature into account.
The Eclipse 705 with 7MS probe resists a process pressure of 155 bar at an equivalent temperature of +345C in saturated steam applications.
For non-steam applications, Eclipse can be used on process conditions from - 196C up to +430C / full vacuum up to 430 bar.
The Eclipse 705 transmitter can be configured for both measuring level and liquid-liquid interface in level units or volume units.
The Eclipse 705 is also available in a SIL2 version.
The additional diagnostic tools allow the user to integrate this transmitter within high demanding safety instrument loops.
With a SFF (Safe Failure Fraction) of 91%, Eclipse is the only TDR transmitter on the market that scores as high on safety level.
The Eclipse 705 (with enhanced SIL electronics) is suitable for SIL2 loops as 1oo1 device (hardware fault tolerance 0 - FMEDA analysed by Exida per IEC 61508).
A free of charge copy of the FMEDA / WIB test report can be downloaded from the website.
The Eclipse 705 is available with for use with AMS, and can communicate using fieldbus, HART and FDT/PACTware. Request a free brochure from Magnetrol International ...
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