smart level transmitter series le-eh high … sheet ps le - eh r 01/16 ... long design life and...

DATA SHEETPS LE - EH

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LEAM SRL - www.leamsrl.it - [email protected] Nosate 34 - 20029 Turbigo (MI) ITALY - Tel. +39 0331 871186 - Fax +39 0331 804105

HIGH PERFORMANCESMART LEVEL TRANSMITTER SERIES LE-EH

Series LE-EH torque tube level instrument isdesigned to measure continuously level, interfaceor density for process and tank control. Itsoutstanding technical datas and performancemakes it one of the best Level Instruments onthe market. The Instrument theory is based onthe Archimedes buoyancy principle, and it iscoupled with the latest communication protocolsas HART, PROFIBUS and FIELBUS, so wherethe reliability of the time and experience meetsthe result of research and technology applied onthe field. It is very tough, has a really long lifecycle and requires a limited maintenance.Different styles of mounting and installationsare available depending on customer's requestand need, and a wide range of materials allowsthe optimal solution even to very aggressiveprocess applications.

The LE-EH series is flexible to processtemperature and pressure, Area classifications,and communication protocols and control system;body can be painted as per our standardprocedures, but also customers' ones are verymuch welcome and performed on request.The outstanding market reputation ofEndress + Hauser joins here the absolute provedsolidity and experience of Leam mechanics,making the LE-EH smart level transmitter thelast born and most updated solution, for all yourneeds.

SUMMARY AND BUSINESS VALUE OF LE-EH LEVEL UNIT

Our instrument is designed for measurement of level, interface or density, of liquids, with high accuracy evenunder severe conditions as high pressure, high temperatures, corrosive liquids, foams, agitators, steams.The ruggedised design, high reliability, easy configuration locally by LCD or via digital communication,long design life and freedom from maintenance, reduce the effective costs running your plant and increasein profitability.

DESCRIPTION

rev. 0 - subject to change without notice

PARTNERSHIP

Endress + Hauser is a global leader in measurement instrumentation, services and solutions for industrialprocess engineering, providing solutions and optimizing processes in terms of economic efficiency, safetyand environmental impact.We shall offer an immediate assistance provided by technical specialists in different countries, available onrequest, by:support via remote access for an accurate diagnosis and fast solutionreduce your operating costsadvice on the regular maintenance of your equipmentE+H instruments are certified for the most critical gas groups and temperaures; they can be applied up tozone 0 (gas) and zone 20 (dust). Based on the principle of limiting the current and voltage in a circuit, theyoffer a consistent range of intrinsically safe devices.Instruments are covered by international certifications (IECEx, ATEX, CSA, FM, NEPSI) with variousprotection types such as intrinsic safety, explosion protection (flameproof) and non-incendive designapproaches to meet various risk requirements.Instruments can be equipped by HART interface, Profibus or Foundation Fieldbus, without any external tool,but by themselves, being the relative software and hardware originally designed and approved to be reallySMART on the field; no other supplier can say that, can do that, can prove that.


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PRINCIPLES, FEATURES AND APPLICATIONS

The LE-EH unit is a 2-wire, loop-powered level instrument utilising the buoyancy principle to measure andconvert liquid level/interface changes into a stable output signal to be transmitted or shown on-site. Thelinkage between the level sensing element and ouput electronics simplifies mechanical design and construction.Operation function include Interface, Level, density measurement.

Shall be applied on vessels like:

¥ feedwater heaters¥ boilers¥ flash tanks¥ scrubbers¥ separators¥ receivers

BODY AND CONNECTIONS RATING, MATERIALS, TEMPERATURES

Instrument body is normally in contact with measured fluid or under pressure, so our executions are designed,rated and approved, according to UNI and to ANSI regulations. Our executions is up to ANSI 2500, and astemperature limits we go from -190¡ C. Up to +350¡ C. (in case of temperatures higher or lower than ourstandard, we apply a finned extension between the electronics and the mechanics, to preserve the PCB andits functions).Standard materials for external body and mechanics are CARBON STEEL LCB, for low termperatures andSTAINLESS STEEL, while for internals we use STAINLESS STEEL 316L, Inconel, Hastelloy C, PTFEprotections, depending by process and customer needs.Electronics housing is as standard in aluminium, but the STAINLESS STEEL 316 version is available onrequest.Of course exotic materials for the parts in contact wih process are always available on request, like Tantalium,LCS, Inconel, Hastelloy C, and more.

INTERNALS AND THEIR PRINCIPLES

Torque tube: This assembly is available in AISI 316L, Hastelloy C or Inconel, to ensure a perfect torsionalelasticity with no hysteresis, so to achieve instantaneous and accurate response to the torque tube producedby the buoyancy exerted on the float. PTFE lining is available also to prevent evental corrosion on site.

Displacer: are usually in AISI316L (others available on request), cylindric shape, and their weight is caseby case adapted to process datas in order to duly perform. Displacer lenght determines the measuring range(maximum level run that can be measured). Its diameter depends on the measuring range and is also basedon the specific gravity weight of the liquid(s).The upper part of the displacer rod is provided with a friction free lever to the torque arm connected.

Shall be installed in different features like:

¥ Top - Bottom (TB)¥ Top - Side (TS)¥ Side - Bottom (SB)¥ Side - Side (SS)¥ Top - Internal (TI)¥ Side - Internal (SI)


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Torque measurement: Our instrument has an innovative system to transfer the torsion movement to thepressure sensor, that performs with accuracy and stability.

Density measurement: Displacer is completely immersed and its buoyancy exerted on the float varies withthe specific gravity of the liquid and independently by the level. The dimension of the displacer depends bythe density’s measuring range.

Interface measurement: Interface is defined as the boundary surface between two immiscible liquids withdifferent specific gravities, as for instance water and petrol. The interface occurs in an intermediate zone ofthe displacer who is functioning while completely submerged.The buoyancy who determines the measurement, depends not only by the interface level but also by thedifference in specific liquids’ gravities. Consequently a dedicated displacer and torque tube, if necessary, willbe applied.

Our standard displacer’s lenghts are (in inches): 14� - 32� - 48� - 60� - 72� - 84� - 96� - 120� - special onrequest


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OPERATION

Connection options:¥ HART via Commubox FXA195 and the USB port on a computer¥ PROFIBUS PA via segment coupler and PROFIBUS interface card¥ Service interface with Commubox FXA291 and ToF adapter FXA291 (USB).

Operating concept

Operator-oriented menu structure for user-specific tasks¥ Commissioning¥ Operation¥ Diagnostics¥ Expert levelQuick and safe commissioningGuided menus for applicationsReliable operation¥ Onsite operation possible in several languages¥ Standardized operation at the device and in the operating tools¥ Parameters can be locked/unlocked using the device’s write protection switch, using the devicesoftware or via remote control.Efficient diagnostics increase measurement availability¥ Remedial measures are integrated in plain text

TECHNICAL SPECIFICATIONS

ON PROCESS ELECTRONICS

Ex Approvals_directive: ATEX,IECEx, NEPSI, TIIS, INMETRO,FM, CSA, Also combinationsof different approvals

Functional safety SIL:SIL2/IEC 61508 IEC Ed. 2.0and IEC 61511

PMC51 PMC71

Output signal linear or tailor made

Communication: HART - PROFIBUS PA - FIELDBUS F

Two-wire transmitter Power supply11,5 to 45 (Version for non hazardous area)11,5 to 30V DC (intrinsically save)

Housing protectionIP66/68 NEMA 4X/6P

Housing protectionIP66/67 NEMA 6P

Ambient Temperature range -40¡C to 85¡C(version with display with restrictions in optical propertiessuch as display speed and contrast)

Climate class: Class 4K4H (air temperature: -20 to 55¡C,relative humidity: 4 to 100% satisfied as per DIN EN 60721-3-4)

Ex Approvals_directive: ATEX,IECEx, NEPSI, TIIS, INMETRO,FM, CSA, Also combinationsof different approvals

up to SIL3 / IEC 61508


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MEASURING PRINCIPLE

The capacitive ceramic pressure sensor element Ceraphire¤ is at the core of the transducer. The ceramicsensor is a dry sensor. A pressure-dependent change in capacitance is measured at the electrodes of theceramic substrate and the process isolating diaphragm. Its special features include high overload resistance,corrosion resistance and long-term stability.

1 Air pressure (gauge pressure sensors)2 Ceramic substrate3 Electrodes4 Ceramic process isolating diaphragm

Advantage

¥ Guaranteed overload resistance up to 40 times the nominal pressure¥ Very good reproducibility and long-term stability¥ Extremely high chemical stability¥ High mechanical stability¥ Less relaxation¥ High reference accuracy: PMC51: –0.15% PMC71: –0.05%¥ Used for process pressure monitoring: PMC51: up to SIL2, certified to IEC 61508 Edition 2.0 and IEC 61511 by T�V NORD PMC71: up to SIL3, certified to IEC 61508 by T�V NORD

Communication and data processing

¥ 4 to 20 mA with HART communication protocol¥ PROFIBUS PA— The Endress+Hauser devices meet the requirements of the FISCO model.— Due to the low current consumption of 11 mA – 1 mA, the following number of devices can beoperated on one bus segment if installing as per FISCO:— up to 8 Cerabar M/s for Ex ia, CSA IS and FM IS applications— up to 31 Cerabar M/s for all other applications, e.g. in non-hazardous areas, Ex nA, etc.Further information on PROFIBUS PA can be found in Operating Instructions BA00034S"PROFIBUS DP/PA: Guidelines for planning and commissioning" and in the PNO Guideline.¥ FOUNDATION Fieldbus— The Endress+Hauser devices meet the requirements of the FISCO model.— Due to the low current consumption of 16 mA – 1 mA, the following number of devices can beoperated on one bus segment if installing as per FISCO:— up to 6 Cerabar M/s for Ex ia, CSA IS and FM IS applications— up to 22 Cerabar M/s for all other applications, e.g. in non-hazardous areas, Ex nA, etc.Further information on FOUNDATION Fieldbus, such as requirements for bus system componentscan be found in Operating Instructions "FOUNDATION Fieldbus Overview".

subject to change without notice


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Output signal

¥ 4 to 20 mA with superimposed digital communication protocol HART 6.0, 2-wire¥ Digital communication signal PROFIBUS PA (Profile 3.02)¥ Digital communication signal FOUNDATION Fieldbus

Signal range

¥ 4 to 20 mA HART: 3.8 to 20.5 mA

Supply voltage

¥ 4 to 20 mA HART

¥ PROFIBUS PA

- Version for non-hazardous areas: 9 to 32 V DC

¥ FOUNDATION Fieldbus

- Version for non-hazardous areas: 9 to 32 V DC

Ambient temperature range

¥ Without LCD display: -40 to +85 ¡C (—40 to +185¡F)¥ With LCD display: —20 to +70 ¡C (—4 to +158¡F) (extended temperature application range (-40 to 85 °C (-40 to 185°F)) with restrictions in optical properties such as display speed and contrast)

Type of protection Supply voltage¥ IntrinIntrinsically safe 11.5�30 V DC¥ Other types of protection 11.5 to 45 V DC¥ Devices without certificate (versions with plug-in connection 35 V DC)


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RIGHT MOUNTING LEFT MOUNTING

smart level transmitter series le-eh high … sheet ps le - eh r 01/16 ... long design life and...

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