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144LD Intelligent Buoyancy Transmitter with Torque Tube and Displacer for Level, Interface and Density with Communication HART / Foxcom

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144LD Intelligent Buoyancy Transmitter with Torque Tube and Displacer for Level, Interface and Density with Communication HART / Foxcom Master Instruction 05.2003 MI EML0610 A-(en) 144LD Intelligent Buoyancy Transmitter with Torque Tube and Displacer for Level, Interface and Density with Communication HART / FoxCom These intelligent transmitters are designed to perform measurements for liquid level, interface or density of liquids. The measurement is based on the Archimedes buoyancy principle. Easy remote configuration and supervision with PC or Universal Handterminal is possible. The devices also can be operated conventionally using local keys. The transmitters are approved for use in hazardous areas. FEATURES • Communication HART or FoxCom • Local display in %, mA or physical units • Conventional operation with local keys • Signal noise suppression by Smart Smoothing • Easy adaptation to the measuring point • Linear or customized characteristic without calibration at the workshop • Process temperature from –196 °C to +400 °C • Back-documentation of measuring point • Materials for use with aggressive media • Continuous self-diagnostics • Micro sintermetal sensor technology • Configurable safety value • Separate mounting of sensor and amplifier with • Software lock for local keys and reconfiguration remote amplifier mounting kit • Simulation of analog output for loop-check Repair and maintenance must be carried out by qualified personnel! 2 144LD MI EML0610 A-(en) CONTENTS CHAP. CONTENTS PAGE CHAP. CONTENTS PAGE 1 DESIGN ..............................3 10 MAINTENANCE, REPAIR ................25 2 METHOD OF OPERATION................3 10.1 Visual inspectiont .......................25 2.1 Measuring principle ......................4 10.2 Sensor check..........................25 2.2 Block diagram from Ser.No. 93/...............5 10.3 Amplifier check ........................25 10.4 Replacement of amplifier alectronics or sensor . 26 3 IDENTIFICATION .......................6 10.5 Replacing displacer .....................28 3.1 Transmitter nameplate....................6 3.2 Tag No. label...........................6 Dismantling and Mounting of 3.3 Amplifier nameplate......................6 10.6 Sensor section .......................29 3.4 Adjustment data label ...................7 10.8 Connecting rod of sensor cell ............31 3.5 Sensor label ...........................7 10.10 Heat sink ...........................32 3.6 Boiler label ............................7 10.12 Torque tube .........................32 10.14 Wafer body bearing ...................33 4 MOUNTING ...........................8 4.1 High medium temperatures ................8 11 DIMENSIONING OF DISPLACER..........34 4.2 Mounting on top of the vessel ..............8 12 SAFETY REQUIREMENTS ..............36 4.3 Mounting on the side of the vessel ...........8 4.4 Mounting the wafer body ..................9 13 DIMENSIONS .........................37 4.5 Displacer 104DE .......................10 14 SUPPLY OF TRANSMITTER .............38 5 ELECTRICAL CONNECTION ............12 14.1 General ..............................38 5.1 Signal wire connection...................12 14.2 Overview of application types ..............38 5.2 Ground ..............................12 14.2.1 Supply via power supply unit ..............38 14.2.2 Direct supply ..........................38 6 COMMISSIONING .....................13 14.2.3 Communication ........................39 7 DECOMMISSIONING ...................13 14.2.4 Operating via I/A-System .................39 14.2.5 Intrinsically-safe application ...............39 8 CALIBRATION OF TRANSMITTER ........14 8.1 Calibration via local keys .................14 8.2 Hardware write protection ................16 8.3 Calibration via Display Keys...............17 8.3.1 Menu node “Display measurement value”. 17 Further documentation: 8.3.2 Menu node “MAINT”...................18 Master Instruction MI EML0610 B-(en) / MI EML1610 B-(en) 144LD / 144LVD Intelligent Buoyancy Transmitters 8.3.3 Menu node “SPECIAL”.................19 Communication with HART Protocol 8.3.4 Error messages........................23 Master Instruction MI EMO0110 A-(en) 8.3.5 Warning messages .....................23 HT991 Universal Hand terminal for HART Devices 8.3.6 Monitoring of time ......................23 Master Instruction MI EMO0120 A-(en) ABO991 Display and User Interface for HART devices 9 LOCAL DISPLAY ......................24 9.1 Installation of local display ................24 WPP991 Write Protection Program Master Instruction MI EML0610 C-(en) / MI EML1610 C-(en) 144LD / 144LVD Intelligent Buoyancy Transmitters Communication with FOXCOM Protocol HHT Instruction Book 3372 I/A Series Hand Held Terminal PC10 Instruction Book 3466 Intelligent Transmitter Configurator MI EML0610 A-(en) 144LD 3 1 DESIGN 131 133 134 135 120 121 150 20 131 LH 20 Amplifier 120 Sensor housing 121 Sensor 131 Wafer body with heat sink and torque tube 133 Transmission lever 134 Torque tube 20 135 Clamping lever 150 Displacer with suspen- sion chain LH Version for left-hand mounting 150 120 For left-sided mounting all inside parts are arranged in inversed manner. 2 METHOD OF OPERATION The buoyancy force of the displacer 150 is transferred via The voltage at the diagonal bridge section which is propor- transmission lever 133 and torque tube 134 to operating tional to the effective weight is fed to the electronic amplifier rod of the sensor, where it acts on free end of sensor ele- as an input signal. ment 121 . This voltage is converted via the electronic amplifier into the Four thin film metal strain gauge elements are sputtered 4 to 20 mA or digital two-wire output signal. onto sensor element, which change their resistance in the The amplifier is supplied by the signal current circuit in ratio of the tensile or pressure tension. These four thin film two-wire mode. metal strain gauge elements are connected as a Wheatsto- ne full bridge supplied from amplifier. 4 144LD MI EML0610 A-(en) 2.1 Measuring principle (see VDI/VDE Guideline 3519, sheet 1 “Verdrängermetho- de”) Any body immersed into a liquid is subject to Archimedian buoyancy force which depends on the liquid density. This is exploited to determine liquid level, density and interface le- vel by suspending a displacer with constant cylindric shape into a liquid. Changes in buoyancy forces are proportional to liquid level changes and are converted to a measuring signal. The displacer is fully immersed for density and interface le- vel detection. It is important that the position of the displacer changes as little as possible over the measuring range. The following applies in general to the buoyancy force F acting on the displacer: FA =Vx ⋅ρ1 ⋅ g +(V - Vx ) ⋅ρ2 ⋅ g FA Buoyancy force V Volume of displacer Vx Volume of medium displaced by measuring body with density ρ1 ρ1 Average density of heavier medium ρ2 Average density of lighter medium g Local acceleration due to gravity FG Displacer body weight force The force acting on the transmitter is inversely propor- tional to liquid level changes. vel le uid F iq L A 100 % r 2 V L r 1 Displacer characteristic V in the measured medium x with 0% F A F G F =F F A (0%) G A (100%) Measuring range MI EML0610 A-(en) 144LD 5 2.2 Block diagram (for HART and FoxCom (from Serial No. 93/...)) Sensor *) Signal Mains *) Zero Smart Damping fingerprint Sensor propor- filter calibration Smoothing data calibration tional to buoyancy force 50/60 Hz Damping Zero Phys. Transfer Measuring unit Customized Characteristic function span % calibration PV *) linear or Measuring Phys. unit Setpoint linear, square-root- square-root-extracted span extracted or customized Digital PV Output PV %mA Low flow % PV Substitue Display cut-off value % mA % mA On/Off failsafe Selection D A Analog output AA Alignment D/A-converter *) calibration ex factory 6 144LD MI EML0610 A-(en) 3 IDENTIFICATION (Examples) 3.3 Amplifier nameplate 3 Amplifier Ident No. Type of protection VERSTÄRKER / AM PLIFIER 100% 100% EBE SER.No. 0102 KOM M UNIKATION 4 ... 2 0 Fm O A X C O M PIT R O 1 F IB U S a c c . F IS C O HART F O X C O M FFIT 2FIELDBUS H1 HILFSENERGIE AUSGANG / OUTPUT POW ER SUPPLY M a d e in G e rm a n y by FOXBORO ECKARDT GmbH D - 70376 STU TTG AR T Without / with explosion protection 1 2 3 The transmitter is identified with three labels. The transmit- Type of protection ter nameplate 1 shows the Model Code of the transmitter, which clearly describes the device. The certificate data and . VERSTÄRKER / AM PLIFIER the Serial No. are entered on the amplifier nameplate 3 . EBE SER.No. KOM M UNIKATION 0102 The TAG No. label 2 with the Tag No. is located under- 4 ... 2 0F Om X A C O M PROFIBUS IT 1 acc. FISCO neath (as an option). HART FO XCO M FF IT2 FIELDBUS H1 PTB Nr.ATEX TYPE Data on the permissible static pressure and the displacer siehe Betriebsanleitung Pi Ui are documented on the adjustment data label 7 on the Ii Ci Li Tam bsee Instruction Manual sensor housing M ade in Germany by FOXBORO ECKARDT Gm bH D - 7 0 3 7 6 S T U T T G A R T . With explosion protection 3.1 Transmitter nameplate 1 Device spezification, Model Code . ELECTRICAL TRANSM ITTER S E R . N o .OUTPUT m A IS F O R C L I; D IV 1 , G R P S A , B , C & D ; C L II, D IV 1 , M ESSUM FORM ER / TRANSM ITTER G R P S E , F & G ; C L III; H A Z A R D O U S L O C A T IO N S SEE DRAW . MODEL144LD-23ESRSEA4AP1H-AHL5 W ARNING: SUBSTITUTION OF COMPONENTS E x iaM A Y IM P A IR IN T R IN S ICAPPROVED S A F E T Y . - S U IT A B L E F O R C L I, D IV 2 , G P A , B , C , D ; S U IT A B L E F O R C L II, D IV 2 , G P F & G ; S U IT A B L EW F ARNING: O RDO C L NOT III; DISCONNECT EQUIPMENT UNLESS - P O W E R H A S B E E N S W IT C H E D O F F O R T H E A R E A IS K N O W N T O B E N O N - HAZARDOUS.
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