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244LD Levelstar Intelligent Buoyancy Transmitter for Level

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244LD Levelstar Intelligent Buoyancy Transmitter for Level Master Instruction 11.2016 MI EML0710 G-(en) 244LD LevelStar Intelligent Buoyancy Transmitter for Vers. 6.2.x Level, Interface and Density with Torque Tube and displacer – HART and Foundation Fieldbus – The intelligent transmitter 244LD LevelStar is designed to perform continuous measurements for liquid level, interface or density of liquids in the process of all industrial applications. The measurement is based on the proven Archimedes buoyancy principle and thus extremely robust and durable. Measuring values can be transferred analog and digital. Digital communication facilitates complete operation and configuration via PC or control system. Despite extreme temperatures, high process pressure and corrosive liquids, the 244LD measures with consistent reliability and high precision. It is approved for installations in contact with explosive atmospheres. The 244LD combines the abundant experience of FOXBORO with most advanced digital technology. FEATURES • HART Communication, 4 to 20 mA, or • Backdocumentation of measuring point Foundation Fieldbus • Continuous self-diagnostics, Status and diagnostic • Configuration via FDT-DTM messages • Multilingual full text graphic LCD • Configurable safety value • IR communication as a standard • Local display in %, mA or physical units • Easy adaptation to the measuring point • Process temperature from –196 °C to +500 °C without calibration at the workshop • Materials for use with aggressive media • Linear or customized characteristic • Micro sintermetal sensor technology • 32 point linearisation for volumetric measurement Repair and maintenance must be carried out by qualified personnel! 2 244LD MI EML0710 G-(en) CONTENTS CHP. CONTENTS PAGE CHP. CONTENTS PAGE 1 DESIGN 3 6 COMMISSIONING 9 2 METHOD OF OPERATION 3 7 DECOMMISSIONING 9 3 IDENTIFICATION 4 8 CALIBRATION OF TRANSMITTER 9 Nameplates Local keys 10 Menus on the LCD 11 4 MOUNTING 5 4.1 High medium temperatures 5 9 DIMENSIONING OF DISPLACER 16 4.2 Mounting on top of the vessel 5 4.3 Mounting on the side of the vessel 5 10 MEASURING PRINCIPLE 18 4.4 Mounting the wafer body 6 10.1 Block diagram with HART communication 19 4.5 Displacer 204DE 7 10.2 Explanations to Block diagrams 19 5 ELECTRICAL CONNECTION 8 11 SUPPLY OF TRANSMITTER 22 5.1 Signal wire connection 8 12 Error messages on LCD and on DTM screen 24 5.2 Ground 8 Version with heating jacket MI EML0710 G-(en) 244LD 3 1 DESIGN 133 134 135 22 131 128 121 20 150 LH 20 Amplifier 22 Terminal compartment 121 Sensor 128 Heat sink 131 Wafer body with torque tube 133 Transmission lever 134 Torque tube 135 Clamping lever 150 Displacer with suspen- sion chain LH Version for left-hand mounting 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 as an input signal. element 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 ratio of the tensile or pressure tension. These four thin film The amplifier is supplied by the signal current circuit in two- metal strain gauge elements are connected as a Wheatstone wire mode. full bridge supplied from amplifier. 4 244LD MI EML0710 G-(en) 3 IDENTIFICATION The transmitter is identified with several labels. Boiler label 3 3 Boiler label with nominal pressure, material, permissible pressure and temperature load, serial no., etc 1 2 Adjustment data label Matching the displacer: Take care of correct matching of transmitter and displacer Transmitter nameplate 1 while mounting. Each transmitter is calibrated to the The transmitter nameplate shows the Model Code of respective displacer according to the ordering data in the transmitter, the serial No. and certification data. factory. Each transmitter/displacer pair has adjustment data (Example) labels to prevent dismatching. Torque tube material label TORSIONSROHR - TORQUE TUBE 1.4404 / 1.4435 / 2.4610 / 2.4816 ECEP: ID No. for special version Refers to the material of the torque tube and is attached at the edge of the flange. Tag No. label 2 (Example) Thread label Attached to amplifier. In the version with NPT threads, near the cable gland is a label describing the type of thread. LID 09/16 Optional label with devices acc. to NACE-Standard. With attached Tag No. label, on the rear side of Tag No. label. MI EML0710 G-(en) 244LD 5 4 MOUNTING The 244LD LevelStar is directly built onto the vessel or If the vessel contains a turbulent liquid a protection cage / alternatively on a side-mounted displacer chamber (e.g. tube should be used. It has a venting hole 146 above the 204DC). maximum liquid level. Between the protection cage / tube 142 and the displacer 150 must be a gap of 5 ... 10 mm. During installation, the permissible static pressure and the ambient temperature range must be observed. (see chap. 3, Boiler label). 4.3 Mounting on the side of the vessel 4.1 High medium temperatures It is important to ensure that the max. permissible tempe- 120 20 rature of the electronics housing of 85 °C and that of the 141 sensor housing of 120 °C is not exceeded. For explosion-proof equipment and devices approved for 131 overfill protection according to WHG, the information in the 140 product specifications PSS EML0710 and in the certificates or approvals must be observed. 4.2 Mounting on top of the vessel 150 120 20 141 148 131 147 140 146 150 142 147 Displacer chamber 204DC 148 Shut-off device When used in Zone 0, fittings resistant to flame penetration must be used. If the chamber has not already been mounted by the customer, it must be mounted on the vessel with suitable bolts and seals (not included in the scope of delivery). Be sure that the displacer chamber is exactly vertical. Between the protection cage or tube and the displacer must be a gap of 5 ... 10 mm. 20 Amplifier 141 Blind flange 120 Sensor housing 142 Protection cage/tube 131 Wafer body 146 Venting hole 140 Connecting flange 150 Displacer 204DE 6 244LD MI EML0710 G-(en) 4.4 Mounting the wafer body Tighten the nuts on all bolts with the appropriate wrench. Proceed crosswise to avoid jamming. Recommended tightening torque (Prestressed to 70% of minimum yield point at 20 °C) 131 Mat. M12 M16 M20 M24 M27 M30 M36 133 40 95 185 310 450 630 1080 A2-70 153 Nm Nm Nm Nm Nm Nm Nm 1.7225 50 120 250 435 630 860 1500 1.7709 Nm Nm Nm Nm Nm Nm Nm (8.8) 132 Note: Studs and nuts material depends on material of wafer 139 body and temperature of process medium. 140 Place the seal 139 1) on the connecting flange 140 . Insert displacer in displacer chamber or vessel. Note for displacers with diameters less than 30 mm Hold 244LD LevelStar 131 above connecting flange. Displacers with diameters < 30 mm can also be suspended Engage eyelet 153 of displacer chain in notch in when the wafer body has already been mounted. transmission lever 133 and fit wafer body onto connecting As an aid to installation, a wire can be pulled through the flange. hole in the eyelet 153 . The displacer is lowered through Do not drop the appended displacer! the wafer body with this wire, past the transmission lever Avoid jerky load! and into the displacer chamber or vessel. The eyelet must Set 244LD Level Star to the mounting flange: then be hooked onto the notch 133 in the transmission lever. Finally remove the wire. 131 153 133 143 132 142 140 In order to make mounting easier, mounting bracket 132 is secured with a stud 142 to connecting flange 140 . It is advisable to preassemble a stud by screwing a nut 143 onto thread. Insert this stud through the top of mounting bracket and connecting flange. Screw sufficient number of nuts onto thread and reduced shaft from underneath for the wafer body to be firmly in position. Place seal 139 1) on wafer body. Place blind flange 141 on wafer body so that holes in blind flange and connecting flange 140 are aligned. Insert remaining studs. Screw on nuts and tighten gently. Unscrew nut 143 and pull stud downwards. 1) When using an electrically non-conducting soft gasketing, the wafer body must be grounded, see chap. 5.2 . MI EML0710 G-(en) 244LD 7 4.5 Displacer 204DE Ensure correct matching of transmitter and displacer while Damping element mounting. Each transmitter is calibrated to the respective In operating conditions with strong external vibrations - e.g. displacer according to ordering data in the factory. nearby compressor stations - the damping element See also chap. 3 ”Adjustment data label”. (Option -D) should be used. Replacing displacer Enter the changed data of displacer on the adjustment label (see chapter 3). Pressure Rating The displacer must be designed for the pressure rating of the vessel - however, at least to the operating pressure - and ordered accordingly. Here the maximum possible temperature must be taken into consideration. Displacers made of PTFE are made from solid material, and are, therefore, suitable for all pressures. Divided displacers Displacers with a length of more than 3 m (1 m with PTFE) are divided. The displacer elements are screwed together and secured with the wire clip 151 to avoid bending or damage during insertion into the vessel.
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