Handbook LR01 08.2013 HB EML3020 A-(en) Free-Space Radar Level Meter The LevelWave LR01 is designed to perform continuous level measurement in a wide range of industries and applications. Foxboro Eckardt is known for more than 50 years of experience in level measurement as a leading supplier of extremely robust, durable and reliable level measurements.
LevelWave LR01 HB EML3020 A-(en) 08.
HB EML3020 A-(en) 3 LevelWave LR01 Contents 1 Safety instructions 1.1 1.2 1.3 1.4 6 Software history ............................................................................................................ 6 Intended use ................................................................................................................. 6 Certification................................................................................................................... 7 Radio approvals....................
LevelWave LR01 HB EML3020 A-(en) 4.4 Electrical connection for current output ...................................................................... 49 4.4.1 Non-Ex devices................................................................................................................. 49 4.4.2 Devices for hazardous locations ....................................................................................... 49 4.5 Protection category ................................................................
HB EML3020 A-(en) 5 LevelWave LR01 7.7 Returning the device to the manufacturer................................................................... 89 7.7.1 General information .......................................................................................................... 89 7.7.2 Form (for copying) to accompany a returned device ........................................................ 90 7.8 Disposal .............................................................................................
LevelWave LR01 HB EML3020 A-(en) 1 Safety instructions 1.1 Software history "Firmware revision" agrees with NAMUR NE 53. It is a series of numbers used to record the revision status of embedded software (firmware) in electronic equipment assemblies. It gives data on the type of changes made and the effect that changes have on compatibility. Data about software revisions is shown in menu 1.1.0 IDENT. For more data, refer to Function description on page 65.
HB EML3020 A-(en) LevelWave LR01 7 1.3 Certification DANGER! For devices used in hazardous areas, additional safety notes apply; please refer to the Ex documentation. In accordance with the commitment to customer service and safety, the device described in this document meets the following safety requirements: • • • • Electromagnetic Compatibility (EMC) Directive 2004/108/EC in conjunction with EN 61326-1 (2006). SIL-approved devices agree with EN 61326-3-1 (2008) and EN 61326-3-2 (2008).
LevelWave LR01 HB EML3020 A-(en) 1.4 Radio approvals 1.4.1 European Union (EU) LEGAL NOTICE! This level transmitter is intended for installation in closed tanks. It meets the requirements of the R & TTE (Radio Equipment and Telecommunications Terminal Equipment) Directive 1999/05/EC for use in the member countries of the EU. An industry agreement includes approval for use of the frequency band (8.6...10.4 GHz) in industrial environments. According to article 6.
HB EML3020 A-(en) LevelWave LR01 9 1.4.2 U.S.A. and Canada LEGAL NOTICE! This device complies with Part 15 of the FCC Rules and with RSS-210 of Industry Canada. Operation is subject to the following two conditions: 1. This device may not cause harmful interference, and 2. This device must accept any interference received, including interference which may cause undesired operation.
LevelWave LR01 HB EML3020 A-(en) 1.5 Safety instructions from the manufacturer 1.5.1 Copyright and data protection The contents of this document have been created with great care. Nevertheless, we provide no guarantee that the contents are correct, complete or up-to-date. The contents and works in this document are subject to copyright. Contributions from third parties are identified as such.
HB EML3020 A-(en) LevelWave LR01 11 1.5.3 Product liability and warranty The operator shall bear responsibility for the suitability of the device for the specific purpose. The manufacturer accepts no liability for the consequences of misuse by the operator. Improper installation and operation of the devices (systems) will cause the warranty to be void. The respective "Standard Terms and Conditions" which form the basis for the sales contract shall also apply. 1.5.
LevelWave LR01 HB EML3020 A-(en) 1.5.5 Warnings and symbols used Safety warnings are indicated by the following symbols. DANGER! This information refers to the immediate danger when working with electricity. DANGER! This warning refers to the immediate danger of burns caused by heat or hot surfaces. DANGER! This warning refers to the immediate danger when using this device in a hazardous atmosphere. DANGER! These warnings must be observed without fail.
HB EML3020 A-(en) LevelWave LR01 13 2 Device description 2.1 Scope of delivery INFORMATION! Do a check of the packing list to make sure that you have all the elements given in the order.
LevelWave LR01 HB EML3020 A-(en) 2.2 Device description The FMCW radar level transmitter is designed to measure the distance, level, mass, volume, flow rate and reflection of liquids, pastes and slurries. Radar level transmitters use an antenna to guide a signal to the surface of the measured product. Radar is a non-contact technology. It is particularly suitable for the level measurement of corrosive and viscous products.
HB EML3020 A-(en) LevelWave LR01 15 Figure 2-4: Types of antenna 1 2 3 4 PP Wave Horn antenna (G 1½ or 1½ NPT threaded connection only) PTFE Wave Horn antenna (DN50...150 / 2¨...6¨ flange connections) Metallic Horn antenna (available antenna sizes: DN80 (3¨), DN100 (4¨), DN150 (6¨) and DN200(8¨)) Wave Guide antenna (Length options: 1...6 m / 3.28...19.68 ft, in increments of 0.5 m / 1.
LevelWave LR01 HB EML3020 A-(en) 2.3 Visual Check INFORMATION! Inspect the cartons carefully for damages or signs of rough handling. Report damage to the carrier and to the local office of the manufacturer.
HB EML3020 A-(en) LevelWave LR01 17 2.4 Nameplates INFORMATION! Look at the device nameplate to ensure that the device is delivered according to your order. Check for the correct supply voltage printed on the nameplate. 2.4.
LevelWave LR01 HB EML3020 A-(en) 3 Installation 3.1 General notes on installation INFORMATION! Inspect the cartons carefully for damages or signs of rough handling. Report damage to the carrier and to the local office of the manufacturer. INFORMATION! Do a check of the packing list to make sure that you have all the elements given in the order. INFORMATION! Look at the device nameplate to ensure that the device is delivered according to your order.
HB EML3020 A-(en) LevelWave LR01 19 3.3 Transport WARNING! • Depending on the version, the device will weight approx. 5...30 kg / 11...66 lbs. To carry, use both hands to lift the device carefully by the converter housing. If necessary, lift the device with a hoist. • When handling the device, avoid hard blows, jolts, impact, etc. to prevent damage. 3.4 Pre-installation requirements INFORMATION! Obey the precautions that follow to make sure that the device is correctly installed.
LevelWave LR01 HB EML3020 A-(en) 3.5 Installation 3.5.1 Pressure and temperature ranges DANGER! If the ambient temperature is more than +70°C / +158°F, there is a risk of injury if you touch the device. Use a protective cover or metallic grid to prevent injury. Figure 3-2: Pressure and temperature ranges 1 Flange temperature Non-Ex devices: Depends on the type of antenna, process connection and the seal material. Refer to the table that follows.
HB EML3020 A-(en) LevelWave LR01 21 Ambient temperature / flange temperature, flange and threaded connection, in °C Figure 3-3: Ambient temperature / flange temperature, flange and threaded connection, in °C Ambient temperature / flange temperature, flange and threaded connection, in °F Figure 3-4: Ambient temperature / flange temperature, flange and threaded connection, in °F 1 2 3 4 5 6 7 Maximum ambient temperature, °C Maximum flange temperature, °C Maximum ambient temperature, °F Maximum flange t
LevelWave LR01 HB EML3020 A-(en) 3.5.2 Recommended mounting position CAUTION! Follow these recommendations to make sure that the device measures correctly. They have an effect on the performance of the device.
HB EML3020 A-(en) LevelWave LR01 Point the device in the correct direction Figure 3-6: Point the device in the correct direction to get the best performance Point the tag hole on the housing in the direction of the nearest tank wall. 1 Tag hole 2 Nearest tank wall Figure 3-7: A maximum of 4 FMCW radar level meters can be operated in a tank Figure 3-8: Tanks with conical bottoms Conical bottoms have an effect on the measuring range. The device cannot measure to the bottom of the tank.
LevelWave LR01 HB EML3020 A-(en) 3.5.3 Mounting restrictions CAUTION! Follow these recommendations to make sure that the device measures correctly. They have an effect on the performance of the device. We recommend that you prepare the installation when the tank is empty.
HB EML3020 A-(en) LevelWave LR01 25 Obstacles in the tank Figure 3-10: Obstacles in the tank Do not put the device directly above obstacles (agitator, support beams, heating tubes etc.). Parasitic signals from obstacles will cause the device to measure incorrectly.
LevelWave LR01 HB EML3020 A-(en) Devices with Metallic Horn antenna Figure 3-12: Devices with Metallic Horn antenna 1 2 3 4 If the roof is not flat, the antenna must project out of the nozzle Short tank nozzle Long tank nozzle (device with an antenna extension) If the roof is flat and the tank fitting is symmetrical, it is not necessary for the antenna to project out of the nozzle. Thus, the device can have a larger measuring range. The antenna must project out of the nozzle.
HB EML3020 A-(en) LevelWave LR01 27 Requirements for flange connections Figure 3-14: Flange connection Equipment needed: • • • • • • • • Device Flange gasket (not supplied) Wrench (not supplied) Make sure the flange on the nozzle is level. Make sure that you use the applicable gasket for the flange dimensions and the process. Align the gasket correctly on the flange facing of the nozzle. Lower the antenna carefully into the tank. Make sure that you point the device in the correct direction.
LevelWave LR01 HB EML3020 A-(en) Requirements for threaded connections Figure 3-15: Threaded connection Equipment needed: • • • • Device Gasket for G 1½ connection (not supplied) Thread seal tape (PTFE) for 1½ NPT connection (not supplied) 50 mm / 2¨ wrench (not supplied) WARNING! Do not tighten the connection to a torque more than 40 Nm. If the connection is too tight, this will damage the thread.
HB EML3020 A-(en) LevelWave LR01 29 3.5.4 Standpipes (stilling wells and bypass chambers) Use a standpipe if: • • • • • There is highly conductive foam in the tank. The liquid is very turbulent or agitated. There are too many other objects in the tank. The device is measuring a liquid (petro-chemicals) in a tank with a floating roof.
LevelWave LR01 HB EML3020 A-(en) Stilling wells - general notes Installation in tanks containing one liquid and foam • Drill an air circulation hole (max. Ø10 mm / 0.4¨) in the stilling well above the maximum level. • Remove the burr from the hole. Installation in tanks containing one liquid or more without foam • Drill an air circulation hole (max. Ø10 mm / 0.4¨) in the stilling well above the maximum level.
HB EML3020 A-(en) LevelWave LR01 31 Stilling wells: horizontal cylindrical tanks We recommend that you install the device in a stilling well if the device: • • • • is for a horizontal cylindrical tank, is in a metallic tank, measures a product with a high dielectric constant and is on the centerline of the tank. Figure 3-18: Horizontal cylindrical tanks 1 The device is installed without a stilling well. There are multiple reflections. Refer to the CAUTION! that follows.
LevelWave LR01 HB EML3020 A-(en) Bypass chambers Installation next to tanks containing one liquid and foam • • The top process connection of the bypass chamber must be above the maximum level of liquid. The bottom process connection of the bypass chamber must be below the lowest measured level of liquid. Installation next to tanks containing more than one liquid • • • The top process connection of the bypass chamber must be above the maximum level of liquid.
HB EML3020 A-(en) LevelWave LR01 33 3.5.6 How to attach an antenna extension (Metallic Horn or Wave Guide antennas) CAUTION! IF THE ANTENNA EXTENSION IS SUPPLIED WITH THE DEVICE AS AN OPTION: If the antenna extension is attached to the device, no more work is necessary. If the antenna extension is not attached to the device, refer to Procedure 1 in this section. It is not necessary to change the device settings. The manufacturer sets the related menu items to the correct values in the factory.
LevelWave LR01 HB EML3020 A-(en) Figure 3-21: Procedure: How to attach an antenna extension WARNING! Make sure that you do not damage the PTFE cone when you remove or install the antenna. Procedure 1: How to attach an antenna extension 1 Remove the 3 hex head screws from the antenna with the 10 mm wrench. 2 Remove the antenna. Make sure that you do not damage the PTFE cone when you remove the antenna. 3 Attach the antenna extension below the flange.
HB EML3020 A-(en) LevelWave LR01 35 Procedure 2A: Device settings for a device with a straight antenna extension • Enter the SUPERVISOR menu (2.0.0). • Push [>], 2 × [ ], [>] and 6 × [ ] to go to menu item ANTENNA EXTENSION (2.3.7). • Push [>] to change the value. Push [>] to change the position of the cursor. Push [ ] to decrease the value or [ ] to increase the value. i If the antenna extension has a length of 500 mm, enter the value "500" (if units for this menu item are in mm).
LevelWave LR01 HB EML3020 A-(en) Figure 3-22: How to turn or remove the signal converter 1 Tool: 5 mm Allen wrench (not supplied) for the lock screw on the signal converter 2 Cover for the wave guide hole on top of the process connection assembly (not supplied) CAUTION! Do not loosen the 4 socket head screws on the process connection assembly. If you remove the housing, put a cover on the the wave guide hole on top of the process connection assembly.
HB EML3020 A-(en) LevelWave LR01 37 Figure 3-24: Installation of the weather protection (general procedure) 1 Remove the 2 butterfly screws from the housing. Make sure that spring washer is attached correctly to the housing (on the weather protection fixture). 2 Lower the weather protection onto the device. 3 Attach the 2 butterfly screws. Make sure that you use the correct holes to attach the weather protection.
LevelWave LR01 Figure 3-25: Holes for installation of the weather protection (housing versions) 1 2 3 4 Compact horizontal housing (non-Ex and Ex i-approved devices) Compact horizontal housing (Ex d-approved devices) Compact vertical housing (non-Ex and Ex i-approved devices) Compact vertical housing (Ex d-approved devices) The overall dimensions of the weather protection are on page 108.
HB EML3020 A-(en) LevelWave LR01 3.5.9 How to open the weather protection Figure 3-26: How to open the weather protection 1 Loosen the bolt on each side of the weather protection. 2 Pull the sides of the weather protection out of the notch for the closed position. 3 Pull the weather protection up and back. i This will open the weather protection. 4 Tighten the bolts to lock the weather protection in its open position.
LevelWave LR01 HB EML3020 A-(en) 4 Electrical connections 4.1 Safety instructions DANGER! All work on the electrical connections may only be carried out with the power disconnected. Take note of the voltage data on the nameplate! DANGER! Observe the national regulations for electrical installations! DANGER! For devices used in hazardous areas, additional safety notes apply; please refer to the Ex documentation. WARNING! Observe without fail the local occupational health and safety regulations.
HB EML3020 A-(en) LevelWave LR01 41 CAUTION! • Use the applicable electrical cables with the cable glands. • Make sure that the power supply does not have a current more than 5 A or that there is 5 Arated fuse in the electrical circuit that energizes the device. • Make sure that the polarity of the power supply is correct. If the polarity is incorrect, you will not cause damage to the device but the device will not operate.
LevelWave LR01 HB EML3020 A-(en) Figure 4-4: How to close the terminal compartment cover • Put the cover on the housing and push it down. • Turn the cover clockwise until it is fully engaged. • Tighten the lock screw. 4.2.
HB EML3020 A-(en) LevelWave LR01 43 4.3 Remote device data 4.3.1 Requirements for signal cables supplied by the customer DANGER! An Ex-approved signal cable is supplied by the manufacturer with devices for hazardous locations. Use of this signal cable is mandatory. Non-Ex devices only: The signal cable is an option for non-Ex devices. If the signal cable is not supplied by the device manufacturer, the cable must have properties that follow: Basic properties • Twisted cable 2 by 2, shielded or screened.
LevelWave LR01 HB EML3020 A-(en) 4.3.
HB EML3020 A-(en) LevelWave LR01 45 Figure 4-7: How to prepare the signal cable 1 2 3 4 5 6 Remove the PVC jacket from the wire to dimension "a". a = 50 mm / 2¨. Remove the insulation from the wire. Obey national regulations for electrical wiring. Crimp the wire end ferrules on the conductors. Install shield wire insulation on the 2 ends of the shield wire. Crimp the Faston connectors on the 2 ends of the shield wire. Install a heat-shrinkable sleeve on the PVC jacket. 4.3.
LevelWave LR01 HB EML3020 A-(en) Equipment needed Figure 4-8: Equipment needed to prepare the signal cable 1 Remote coverter 2 Antenna housing 3 Signal cable (supplied on request for non-Ex devices) - for more data, refer to How to prepare a signal cable supplied by the customer on page 44 4 Small slotted-tip screwdriver (not supplied) Connections between the remote converter and the probe housing Figure 4-9: Connections between the remote converter and the probe housing 1 2 3 4 5 6 7 Remote cover
HB EML3020 A-(en) LevelWave LR01 47 How to connect the signal cable to the remote converter Figure 4-10: How to connect the signal cable to the remote converter CAUTION! Bending radius of the signal cable: ≥ 50 mm / 2¨ 1 2 3 4 5 6 7 8 Remove the terminal compartment cover. Remove the 4-pin connector. Put the signal cable into the opening of the cable gland. Put the electrical wires in the connector terminals. Tighten the terminal screws with a small slotted-tip screwdriver.
LevelWave LR01 HB EML3020 A-(en) How to connect the signal cable to the antenna electronics Figure 4-11: How to connect the signal cable to the antenna electronics CAUTION! Bending radius of the signal cable: ≥ 50 mm / 2¨ 1 2 3 4 Remove the terminal compartment cover. Remove the 4-pin connector. Put the signal cable into the opening of the cable gland. Put the electrical wires in the connector terminals. Tighten the terminal screws with a small slotted-tip screwdriver.
HB EML3020 A-(en) LevelWave LR01 49 4.4 Electrical connection for current output 4.4.1 Non-Ex devices Figure 4-12: Electrical connections for non-Ex devices 1 Power supply 2 3 4 5 Resistor for HART® communication Optional connection to the grounding terminal Output: 12...30 VDC for an output of 22 mA at the terminal Device 4.4.
LevelWave LR01 HB EML3020 A-(en) • Close unused cable feedthroughs with dummy plugs 3. The diameter of the outer sheath of the electrical cable and must be 6…10 mm or 0.2…0.39¨. 4.6 Networks 4.6.1 General information The device uses the HART® communication protocol. This protocol agrees with the HART® Communication Foundation standard. The device can be connected point-to-point. It can also operate in a multi-drop network of up to 15 devices.
HB EML3020 A-(en) LevelWave LR01 4.6.
LevelWave LR01 HB EML3020 A-(en) 4.6.4 Fieldbus networks INFORMATION! Fieldbus options are available for the compact version of the device. For more data, refer to the supplementary instructions for FOUNDATION™ fieldbus and PROFIBUS PA.
HB EML3020 A-(en) PROFIBUS PA/DP network (non-Ex) Figure 4-17: PROFIBUS PA/DP network (non-Ex) 1 2 3 4 5 6 7 Field device Bus termination PROFIBUS PA bus segment Segment coupler (PA/DP link) PROFIBUS DP bus line Control system (PLC / Class 1 master device) Engineering or operator workstation (Control tool / Class 2 master device) LevelWave LR01 53
LevelWave LR01 HB EML3020 A-(en) 5 Start-up 5.1 How to start the device 5.1.
HB EML3020 A-(en) LevelWave LR01 55 5.3 Digital display screen 5.3.
LevelWave LR01 HB EML3020 A-(en) Figure 5-2: Local display screen layout in configuration mode 1 Function name 2 Configuration mode symbol 3 Menu number 5.3.
HB EML3020 A-(en) LevelWave LR01 57 Install these software programs and equipment: • • Microsoft® .NET Framework version 1.1 or later. PACTware. • • HART® converter (USB, RS232...). The Device Type Manager for the device. The software and installation instructions are given on the DVD-ROM supplied with the device. You can also download the latest version of PACTware™ and the DTM from our internet site. Refer also to the PACTware™ consortium site at http://www.pactware.de.
LevelWave LR01 HB EML3020 A-(en) 6 Operation 6.1 User modes Normal mode This mode displays measurement data. For more data, refer to Normal mode on page 58. Configuration mode Use this mode to view parameters, commission the device, create tables for volume or mass measurement, change critical values to measure in difficult process conditions. To get access to supervisor menu, refer to Protection of the device settings on page 75.
HB EML3020 A-(en) LevelWave LR01 59 Measurement type definitions Measurement type Description Available units LEVEL This is a display and an output function option. It is the height from the bottom of the tank to the surface of the liquid (Tank height - Distance). m, cm, mm, in (inches), ft (feet) DISTANCE This is a display and an output function option. It is the distance from the face of the flange (or thread stop) to the surface of the liquid.
LevelWave LR01 HB EML3020 A-(en) 6.3 Configuration mode 6.3.1 General notes Change the settings of your device in Configuration mode. Data about the menus is given on page 65. You can: • • Use the 1.0.0 INFORMATION menu to read settings, device software versions and error records. For more data about the Information menu, refer to Table 1: Info. Use the 2.0.
HB EML3020 A-(en) LevelWave LR01 61 6.3.3 Keypad functions Figure 6-1: Local display screen layout in configuration mode 1 Function name 2 Configuration mode symbol 3 Menu number This is what you see when you are in Configuration mode. The functions of the buttons are given in the table that follows: Functions of buttons for menu navigation Button Description Right Function • • Enter / Esc (Escape) • • Down • • Up • • Go down to the sub-menu level (for example, from menu 1.0.0 to sub-menu 1.
LevelWave LR01 HB EML3020 A-(en) Lists of parameters in menu items Figure 6-2: Lists of parameters in menu items 1 Parameter 2 Menu name This is what you see when you select a menu item that has a list of parameters.
HB EML3020 A-(en) LevelWave LR01 63 Values in menu items Figure 6-3: Values in menu items 1 2 3 4 Menu item with values stored at this time (first screen) Push [>] again to change the values. A cursor shows on the first digit. Menu item name Cursor on the selected digit This is what you see when you select a menu item that has a value.
LevelWave LR01 HB EML3020 A-(en) 6.3.4 Menu overview 1.0.0 Info. (Information) 1.1.0 Ident. (Identification) 1.2.0 Output 1.3.0 History 2.0.0 Supervisor 2.1.0 Commissioning 2.2.0 Tests 2.3.0 Basic Parameters 2.4.0 Output I 2.5.0 Application 2.6.0 Communication 2.7.0 Display 2.8.0 Conversion 2.9.0 Config/Reset 3.0.0 Service n/a Password locked. Menus for factory calibration and qualified service personnel only. 4.0.0 Master n/a Password locked.
HB EML3020 A-(en) LevelWave LR01 6.3.5 Function description 1.0.0 Information (Info.) menu Menu No. Function Function description Selection list 1.1.0 IDENT. 1.1.1 SERIAL NUM. The device serial number. Read only. 1.1.2 CONV.FIRM.VER The converter firmware version. Read only. 1.1.3 SEN.FIRM.VER The sensor firmware version. Read only. 1.1.4 HMI.FIRM.VER The HMI (device display screen) firmware version. Read only. This shows the settings at this time for the output function (OUTPUT FUNC.
LevelWave LR01 HB EML3020 A-(en) 2.0.0 Supervisor menu Menu No. Function Function description Selection list Default 2.1.0 COMMISSION. 2.1.1 PARAMETERS This starts a quick set-up procedure applicable to most applications. The supervisor can give the tank height (TANK HEIGHT), type of tank (TANK TYPE), output function (OUTPUT FUNC.), current output range (RANGE I), 4 mA setting (SCALE 4mA), 20 mA setting (SCALE 20mA), error delay (ERROR DELAY) and tag name (TAG NAME). 2.1.2 EMP.SPEC.REC .
HB EML3020 A-(en) LevelWave LR01 Menu No. Function Function description 2.2.2 DIAGNOSTIC This starts the hardware test. Push [>] many times to show: • D1, the time of operation • T1, temperature of the electronic converter board • I1, loop current (internally measured value) • I2, load current (NOTE: this data is not available at this time) • V1, voltage 5.6 V. If the voltage is not 5.0
LevelWave LR01 HB EML3020 A-(en) Menu No. Function Function description Selection list Default 2.3.6 STILLWELL H. The height of the stilling well. If the device is installed in a stilling well or has a WaveGuide antenna, enter the height. The device will use this data if you set 2.3.4 STILLWELL EN. to "Yes". This menu item is not shown if you set 2.3.4 STILLWELL EN. to "No". min: 500 mm / 19.7¨ max: 2.3.1 TANK HEIGHT 1 2.3.7 ANTENNA.EXT Optional antenna extensions.
HB EML3020 A-(en) Menu No. Function 2.5.2 LevelWave LR01 Function description 69 Selection list Default TRACKING VEL. Maximum tracking velocity. This value must agree with the maximum rate of change of the level of the liquid in the tank. min-max: 0.1…10.0 m/min 0.5 m/min 2.5.3 Er PRODUCT min-max: 1.100 to 10.000 2.000 2.5.4 MEASUR.MODE The device uses the dielectric constant (εr) of the tank contents to monitor level.
Menu No. LevelWave LR01 Function HB EML3020 A-(en) Function description Selection list Default 2.7.0 DISPLAY 2.7.1 LANGUAGE Data can be shown in any of the languages stored in the device. 9 languages are available in 3 packs: (1) English, French, German and Italian; (2) English, French, Spanish and Portuguese; (3) English, Chinese (Mandarin), Japanese and Russian 3 2.7.2 LENGTH UNIT The length unit shown in normal mode. m, cm, mm, in (inches), ft (feet) m 2.7.
HB EML3020 A-(en) LevelWave LR01 71 3. Service menu Menu No. Function Function description 3.0.0 SERVICE Advanced settings. The settings in this menu are protected with a password. Only approved personnel can change the parameters in this menu. For more data, contact your local sales office. Selection list Default Selection list Default 4. Master menu Menu No. Function Function description 4.0.0 MASTER Factory settings. The settings in this menu are protected with a password.
LevelWave LR01 HB EML3020 A-(en) 6.4 Further information on device configuration 6.4.1 Quick Setup (Parameters) Use this procedure to change the tank height, tank type, output function, output range and give the top and bottom measuring limits. « xx » in the illustrations shows that you can change the value or the parameter. Push the keypad buttons in the correct sequence: Procedure Screen Steps Description • [>], [ ] and [>]. Default screen. Enter configuration mode (2.0.0 SUPERVISOR).
HB EML3020 A-(en) LevelWave LR01 Screen Steps • • • • • • • • • • • • • • • • • 73 Description [>] to change Scale 4 mA. [>] to change the position of the cursor. [ ] to decrease the value or [ ] to increase the value. [^] to confirm. Use this step to give the 4 mA output setting (0% limit) in the tank. Refer to the illustrations that follow. Illustration 1 shows the settings for level. Illustration 2 shows the settings for distance. [>] to change Scale 20 mA.
LevelWave LR01 HB EML3020 A-(en) 6.4.2 Test Use this procedure to test the loop current. « xx » in the illustrations shows that you can change the value or the parameter. Push the keypad buttons in the correct sequence: Procedure Screen Step Description Default screen. • [>], [ ] and [>]. • • Enter the password: [>], [^], [ ], [ ], [>] and [^]. [^] • [ ]. • [>]. • • [>]. [ ] to decrease the value or [ ] to increase the value. [^] to confirm. This step sets the loop current value.
HB EML3020 A-(en) LevelWave LR01 75 6.4.3 Protection of the device settings The menu item PASSWORD (2.7.5) lets you change the supervisor menu password. How to change the supervisor menu password • After you enter the supervisor menu, push 6 × [ ], [>] and 4 × [ ] to go to the menu item PASSWORD (2.7.5). • Enter the new 6-character password (push the 4 buttons in any sequence). • Enter the new 6-character password again.
LevelWave LR01 HB EML3020 A-(en) How to change from multidrop to point-to-point mode • • • • • Enter the supervisor menu. Push [>], 5 × [ ] and [>] to go to menu item ADDRESS (2.6.1). Push [>] to change the value. Enter the value 0 and push [^] to confirm. Push [^] to go back to the "STORE" screen. Push [ ] or [ ] to set the screen to STORE YES and push [^]. i The output is set to point-to-point mode. The current output changes to a range of 4...20 mA or 3.8...20.
HB EML3020 A-(en) LevelWave LR01 77 6.4.6 Level measurement The device displays level measurements when the output function is set to "Level". Menu items related to level measurement are: • • • Output Function (2.4.1) Tank Height (2.3.1) Blocking Distance (2.3.2) CAUTION! If the level for the 20 mA is set in the blocking distance, the device will not be able to use the full current output range. Figure 6-5: Level measurement 1 2 3 4 5 6 Tank Height (2.3.1) Blocking Distance (2.3.
LevelWave LR01 HB EML3020 A-(en) 6.4.7 How to configure the device to measure volume or mass The device can be configured to measure volume or mass. You can set up a strapping table in the conversion table (2.8.0 CONV. TAB) sub-menu. Each entry is a pair of data (level - volume, level mass or level - flow rate). The strapping table must have a minimum of 2 entries and a maximum of 30. The reference point for the table is the bottom of the tank (as given in menu item 2.3.1 TANK HEIGHT).
HB EML3020 A-(en) LevelWave LR01 79 Figure 6-6: A plot of points for a volume or mass table 1 Tank with reference points 2 Tank model with plotted points How to delete a volume or mass table. • • • • • Enter the supervisor menu. Push 7 × [ ], [>], and [ ] to go to 2.8.2 DELETE TABLE. Push [>] and [ ] to set the parameter to YES. Push [^] to go back to the "STORE" screen. Push [ ] or [ ] to set the screen to STORE YES and push [^].
LevelWave LR01 HB EML3020 A-(en) Figure 6-7: How to make a filter to remove radar signal interference 1 2 3 4 5 6 7 8 Empty tank before the device uses the empty spectrum scan (with a graph of reflections shown) Partially filled tank before the device uses the empty spectrum scan (with a graph of reflections shown) Partially filled tank after the device uses the empty spectrum scan (with a graph of reflections shown) Agitator blades location Tank bottom signal Agitator blades signals (interference si
HB EML3020 A-(en) LevelWave LR01 81 6.5 Status and error messages 6.5.1 Device status (markers) If the device senses a change in device status, the display screen will show 1 or more status markers at the bottom right side of the display screen. The display screen will also show a symbol that agrees with NAMUR Recommendation NE 107 (Self-Monitoring and Diagnosis of Field Devices) and VDI/VDE 2650. This is shown at the top left side of the display screen.
NE 107 symbol shown LevelWave LR01 NE 107 Status Failure HB EML3020 A-(en) Description The device does not operate correctly. The fault message stays on. The user cannot remove the "Failure" message from the Normal mode screen.
HB EML3020 A-(en) LevelWave LR01 83 6.5.2 Error handling Figure 6-9: Error record data 1 Error code for the error 2 Number of times the error occurred 3 Time since the last error record (2 days, 18 hours, 16 minutes and 43 seconds shown in this example) How to find an error record • Push [>] to enter configuration mode from normal mode. • Push [>], 2 × [ ] and [>] to go to menu item 1.3.1 ERROR RECORD. • Push 2 × [>] to look at the error list. Push [ ] or [ ] for the selection of an error.
LevelWave LR01 HB EML3020 A-(en) Description of errors and corrective actions Error code Error Message Status marker shown Cause Corrective action Failure (NE 107 status signal) ERR 100 Device reset 1 The device detected an internal error (watchdog timer issue). Record the data that is in menu item 2.2.2 DIAGNOSTIC (Configuration mode / Supervisor menu). Speak to the supplier. ERR 101 Current Output Drift 1 The current output is not calibrated.
HB EML3020 A-(en) Error code Error Message LevelWave LR01 Status marker shown Cause 85 Corrective action ERR 206 Sensor Microwave failure 1 The device's hardware is defective. Replace the signal converter.For more data, refer to How to turn or remove the signal converter on page 35. ERR 207 Sensor Memory failure 1 The device's hardware is defective. Replace the signal converter.For more data, refer to How to turn or remove the signal converter on page 35.
Error code LevelWave LR01 Error Message HB EML3020 A-(en) Status marker shown Cause Corrective action _ Signal Weak 4 The signal amplitude is less than the average value. This can occur if the liquid is agitated or if there is foam in the tank. If this error occurs frequently, the device will possibly show the "Peak Lost (Level Lost)" error message. 1 If this error occurs frequently, it is possible that you must install the device in a stilling well or use a different antenna type.
HB EML3020 A-(en) LevelWave LR01 87 7 Service 7.1 Periodic maintenance No maintenance is necessary. If it is possible that there will be build-up on the antenna, clean the antenna regularly. If your device has the purge option, refer to How to clean horn antennas under process conditions on page 87. WARNING! Do not use bleach to clean the signal converter. 7.
LevelWave LR01 HB EML3020 A-(en) How to use the purge Process conditions How to use the purge The device is colder than other elements in the process. It is possible that there will be condensation in the antenna. Continuous use. Use low-pressure gas to remove condensation from the antenna. There is a risk of build-up in the antenna Purge at intervals. Use compressed air, nitrogen or another gas that is applicable to the process up to 6 bar / 87 psi.
HB EML3020 A-(en) LevelWave LR01 89 7.5 Spare parts availability The manufacturer adheres to the basic principle that functionally adequate spare parts for each device or each important accessory part will be kept available for a period of 3 years after delivery of the last production run for the device. This regulation only applies to spare parts which are subject to wear and tear under normal operating conditions. 7.
LevelWave LR01 HB EML3020 A-(en) 7.7.2 Form (for copying) to accompany a returned device Company: Address: Department: Name: Tel. no.: Fax no.: Manufacturer's order no. or serial no.: The device has been operated with the following medium: This medium is: water-hazardous toxic caustic flammable We checked that all cavities in the device are free from such substances. We have flushed out and neutralized all cavities in the device.
HB EML3020 A-(en) LevelWave LR01 91 8 Technical data 8.1 Measuring principle A radar signal is emitted via an antenna, reflected from the product surface and received after a time t. The radar principle used is FMCW (Frequency Modulated Continuous Wave). The FMCW-radar transmits a high frequency signal whose frequency increases linearly during the measurement phase (called the frequency sweep). The signal is emitted, reflected on the measuring surface and received with a time delay, t.
LevelWave LR01 HB EML3020 A-(en) Measurement modes "Direct" mode If the dielectric constant of the liquid is high (εr ≥1.8), the level signal is a reflection on the surface of the liquid. "TBF Partial" mode If the dielectric constant of the liquid is low (εr ≥1.8, for long distance measurement), you must use "TBF Partial" mode to measure level correctly. TBF Partial" is an automatic mode that lets the device make a selection between "Direct mode and "TBF" mode.
HB EML3020 A-(en) LevelWave LR01 93 8.2 Technical data INFORMATION! • The following data is provided for general applications. If you require data that is more relevant to your specific application, please contact us or your local sales office. • Additional information (certificates, special tools, software,...) and complete product documentation can be downloaded free of charge from the website.
LevelWave LR01 HB EML3020 A-(en) Beam angle (½ angle) of antenna PP Wave Horn: 10° PTFE Wave Horn: 10° Metallic Horn DN80 / 3¨: 16° - used only in stilling wells Metallic Horn DN100 / 4¨: 12° - used only in stilling wells Metallic Horn DN150 / 6¨: 8° Metallic Horn DN200 / 8¨: 6° Wave Guide / stilling well: n/a - the radar signal is inside the tube.
HB EML3020 A-(en) LevelWave LR01 Purging system (option) Max. 6 barg / 87 psig (higher pressure on request) Heating / cooling system (option) Max. 6 barg / 87 psig (higher pressure on request) 95 Other conditions Dielectric constant (εr) Direct mode: ≥1.8 TBF mode: ≥1.1 Refer also to "Technical data: Antenna selection". Ingress protection IEC 60529: IP 66/67 NEMA 250: NEMA type 4X (housing) and type 6P (antenna) Maximum rate of change 10 m/min / 32.
LevelWave LR01 HB EML3020 A-(en) Electrical connections Power supply Terminals output - Non-Ex / Ex i: 12…30 VDC; min./max. value for an output of 22 mA at the terminal Terminals output - Ex d: 16…36 VDC; min./max. value for an output of 22 mA at the terminal Maximum current 22 mA Current output load Non-Ex / Ex i: RL [Ω] ≤ ((Uext -12 V)/22 mA). For more data, refer to Minimum power supply voltage on page 100. Ex d: RL [Ω] ≤ ((Uext -16 V)/22 mA).
HB EML3020 A-(en) LevelWave LR01 97 Approvals and certification CE This device fulfils the statutory requirements of the EC directives. The manufacturer certifies successful testing of the product by applying the CE mark. Vibration resistance EN 60068-2-64 Metallic Horn (without antenna extension options): 5 Hz to 100 Hz: 4g Metallic Horn, PTFE or PP Wave Horn: 3.5 mm up to 8 Hz and 10 m/s²: 1g, 8.
LevelWave LR01 IECEx IECEx DEK xx.xxxx X HB EML3020 A-(en) Compact version Ex ia IIC T6…T2 Ga/Gb or Ex ia IIC T6…T2 Gb or Ex ic IIC T6…T2 Gc; Ex ia IIIC T90°C Da/Db or Ex ia IIIC T90°C Db or Ex ic IIIC T90°C Dc; Ex d ia IIC T6...T2 or Ex d ia IIIC T6...T2 Gb; Ex ia tb IIIC T90°C Da/Db or Ex ia tb IIIC T90°C Db Remote version, transmitter Ex ia [ia Ga] IIC T6…T4 Gb or Ex ic IIC T6…T4 Gc; Ex ia [ia Da] IIIC T90°C Db or Ex ic [ic] IIIC T90°C Dc; Ex d ia [ia Ga] IIC T6...
HB EML3020 A-(en) LevelWave LR01 99 Other standards and approvals SIL Compact version only: SIL 2 - according to EN 61508 and for high/low demand mode operation EMC Electromagnetic Compatibility Directive 2004/108/EC in conjunction with EN 613261 (2006) SIL 2-approved devices agree with EN 61326-3-1 (2008) and EN 61326-3-2 (2008) Radio approvals R & TTE Radio Equipment and Telecommunications Terminal Equipment Directive 1999/5/EC in conjunction with ESTI EN 302 372 (2006) FCC Rules Part 15 Industry
LevelWave LR01 HB EML3020 A-(en) 8.3 Minimum power supply voltage Use these graphs to find the minimum power supply voltage for a given current output load.
HB EML3020 A-(en) LevelWave LR01 101 8.4 Pressure ratings WARNING! Make sure that the devices are used within their operating limits.
LevelWave LR01 ISO threaded connections: PP Wave Horn antenna Figure 8-6: Pressure / temperature rating (ISO 228), threaded connection, in °C and barg Figure 8-7: Pressure / temperature rating (ISO 228-1), threaded connection, in °F and psig 1 2 3 4 5 p [barg] T [°C] p [psig] T [°F] Threaded connection, G (ISO 228-1): PP Wave Horn antenna HB EML3020 A-(en)
HB EML3020 A-(en) LevelWave LR01 ASME flanges: Metallic Horn, Wave Guide and PTFE Wave Horn antennas Figure 8-8: Pressure / temperature rating (ASME B16.5), flange and threaded connections, in °C and barg Figure 8-9: Pressure / temperature rating (ASME B16.
LevelWave LR01 HB EML3020 A-(en) INFORMATION! CRN CERTIFICATION There is a CRN certification option for devices with process connections that agree with ASME standards. This certification is necessary for all devices that are installed on a pressure vessel and used in Canada. ASME flanges for CRN-approved devices: Metallic Horn, Wave Guide and PTFE Wave Horn antennas Figure 8-10: Pressure / temperature rating (ASME B16.
HB EML3020 A-(en) LevelWave LR01 ASME threaded connections: PP Wave Horn antenna Figure 8-12: Pressure / temperature rating (ASME B1.20.1), threaded connection, in °C and barg Figure 8-13: Pressure / temperature rating (ASME B1.20.1), threaded connection, in °F and psig 1 2 3 4 5 p [barg] T [°C] p [psig] T [°F] Threaded connection, NPT (ASME B1.20.
LevelWave LR01 HB EML3020 A-(en) INFORMATION! CRN CERTIFICATION There is a CRN certification option for devices with process connections that agree with ASME standards. This certification is necessary for all devices that are installed on a pressure vessel and used in Canada. ASME threaded connections for CRN-approved devices: PP Wave Horn antenna Figure 8-14: Pressure / temperature rating (ASME B1.20.1), threaded connection, in °C and barg Figure 8-15: Pressure / temperature rating (ASME B1.20.
HB EML3020 A-(en) LevelWave LR01 8.
LevelWave LR01 HB EML3020 A-(en) 8.6 Dimensions and weights Housing, process connection and antenna options Figure 8-18: Housing, process connection and antenna options 1 Housing options. From left to right: compact converter with horizontal housing, compact converter with vertical housing, and remote converter (top) and antenna housing (bottom) 2 Process connection options.
HB EML3020 A-(en) 109 LevelWave LR01 Housing options: Dimensions in mm and inches Dimensions Compact - horizontal Compact - vertical Remote Non-Ex or Ex i (Ex d) Non-Ex or Ex i (Ex d) Non-Ex or Ex i (Ex d) [mm] [mm] [inches] [mm] [inches] [inches] a 205 (265) 8.07 (10.43) 155 (212) 6.10 (8.35) 106 (106) 4.17 (4.17) b 216 (216) 8.50 (8.50) 265 (265) 10.43 (10.43) 188 (188) 7.40 (7.40) c 130 (130) 5.12 (5.12) 130 (130) 5.12 (5.12) 130 (130) 5.12 (5.
LevelWave LR01 HB EML3020 A-(en) Special antenna extensions for tanks with obstructions (DN150 / 6¨ and DN200 / 8¨ Metallic Horn antenna options only) Figure 8-19: Special antenna extensions for tanks with obstructions (DN150 / 6¨ and DN200 / 8¨ Metallic Horn antenna options only) 1 "L" (right angle) antenna extension 2 "S" antenna extension Special antenna extensions: Dimensions in mm Dimensions [mm] Metallic Horn antenna With "L" (right angle) extension DN150 / 6¨ With "S" extension DN200 / 8¨
HB EML3020 A-(en) LevelWave LR01 111 Purging and heating/cooling system options Figure 8-20: Purging and heating/cooling system options 1 2 3 4 5 Flange connection with purging option Flange connection with heating/cooling system option G ¼ threaded connection for purging system (the plug is supplied by the manufacturer) G ¼ threaded connection for the heating/cooling system outlet (the plug is supplied by the manufacturer) G ¼ threaded connection for the heating/cooling system inlet (the plug is suppl
LevelWave LR01 HB EML3020 A-(en) Weather protection option Figure 8-21: Weather protection option for Compact / Vertical and Remote versions Figure 8-22: Weather protection option for Compact / Horizontal and Remote versions 1 Left side (with weather protection open) 2 Rear view (with weather protection closed) 3 Right side (with weather protection closed) Dimensions and weights in mm and kg Weather protection Dimensions [mm] a b c Weights [kg] d Compact / Vertical or Remote versions 251 1
HB EML3020 A-(en) LevelWave LR01 113 Converter and antenna housing weights Type of housing Weights Aluminium housing [kg] Stainless steel housing [lb] [kg] [lb] Non-Ex / intrinsically-safe (Ex i / IS) Compact Remote converter 1 2.5 5.5 5.9 13.0 Antenna housing 1 2.0 4.4 4.1 9.0 Explosion proof (Ex d / XP) Compact 3.2 7.1 7.5 16.5 Remote converter 1 2.9 6.40 7.1 15.65 Antenna housing 1 2.0 4.4 4.1 9.
LevelWave LR01 HB EML3020 A-(en) Antenna options Min./Max. weights [kg] [lb] Other options HT extension 2 +0.98 +2.16 1 This option is for Metallic Horn and Wave Guide antenna options 2 This component is only for the Metallic Horn and Wave Guide antennas. It is attached between the signal converter and the flange if the process connection temperature is +150...+250°C / +302...+482°F.
HB EML3020 A-(en) LevelWave LR01 115 9 Description of HART interface 9.1 General description The HART® Protocol is an open digital communication protocol for industry. It is free to use by anyone. It is included in the software embedded in signal converters of HART-compatible devices. There are 2 classes of devices which support the HART® Protocol: operating devices and field devices.
LevelWave LR01 HB EML3020 A-(en) 9.3 Connection variants The signal converter is a 2-wire device with 4...20 mA current output and HART® interface. • • Multi-Drop Mode is supported In a Multi-Drop communication system, more than 1 device is connected to a common transmission cable. Burst Mode is not supported There are two ways of using the HART® communication: • • as Point-to-Point connection and as Multi-Drop connection with 2-wire connection. 9.3.
HB EML3020 A-(en) LevelWave LR01 117 9.5 Field Communicator 375/475 (FC 375/475) The Field Communicator is a hand terminal from Emerson Process Management that is designed to configure HART® and Foundation Fieldbus devices. Device Descriptions (DDs) are used to integrate different devices into the Field Communicator. 9.5.1 Installation CAUTION! The Field Communicator cannot be used to correctly configure, operate or read data from the device unless the Device Description (DD) file is installed.
LevelWave LR01 HB EML3020 A-(en) 9.6 Asset Management Solutions (AMS) The Asset Management Solutions Device Manager (AMS) is a PC program from Emerson Process Management which is designed to configure and manage HART®, PROFIBUS and Foundation-Fieldbus devices. Device Descriptions (DDs) are used to integrate different devices into the AMS. 9.6.1 Installation Please read the README.TXT file in the Installation Kit.
HB EML3020 A-(en) LevelWave LR01 119 9.8 Process Device Manager (PDM) The Process Device Manager (PDM) is a Siemens PC program designed to configure HART® and PROFIBUS devices. Device Descriptions (DDs) are used to integrate different devices into the PDM. 9.8.1 Installation Install Device Description files supplied in the Device Install HART® PDM folder. This is necessary for each type of field device that is used with SIMATIC PDM.
LevelWave LR01 HB EML3020 A-(en) 9.9 HART® menu tree for Basic-DD Abbreviations of the following tables: • Opt • Rd • Cust • Loc Optional, depending on device version and configuration Read only Custody lock protection Local, affects only DD host views 9.9.1 Overview Basic-DD menu tree (positions in menu tree) 1 Measurements 1 Measurements 2 Outputs 2 Configuration and Test 1 Info.
HB EML3020 A-(en) LevelWave LR01 121 9.9.2 Basic-DD menu tree (details for settings) 1 Measurements 1 Measurements 1 Level value Rd / 2 Distance value Rd / 3 Volume value Rd / 4 Ullage value Rd / 5 Reflection value Rd 2 Inputs/Outputs 1 PV Rd / 2 PV Loop Current Rd / 3 PV % rnge Rd 2 Configuration and Test 1 Info.
LevelWave LR01 HB EML3020 A-(en) 9.10 HART® menu tree for AMS Abbreviations of the following tables: • Opt • Rd • Cust • Loc Optional, depending on device version and configuration Read only Custody lock protection Local AMS, affects only AMS views 9.10.
HB EML3020 A-(en) LevelWave LR01 123 9.10.
LevelWave LR01 HB EML3020 A-(en) 9.11 HART® menu tree for PDM Abbreviations of the following tables: • Opt • Rd • Cust • Loc Optional, depending on device version and configuration Read only Custody lock protection Local PDM, affects only PDM views 9.11.1 Overview PDM menu tree (positions in menu tree) Overview: Menu Device Communication Path Download To Device... Upload To PG/PC...
HB EML3020 A-(en) LevelWave LR01 125 9.11.2 PDM menu tree (details for settings) Device Menu Communication Path Downoad To Device... Upload To PG/PC... Update Diagnosis Status Configuration and Test Info.
LevelWave LR01 HB EML3020 A-(en) Yt diagram Diag / Service Standard Status Device status PV Analog Channel Saturated / Configuration changed Device-specific status Device failures Sensor Microwave error / Current Output Drift / Sensor ROM error / Sensor RAM error / Sensor EEPROM error / Converter ROM error / Converter RAM error / Converter EEPROM error Sensor No Signal / Sensor Not Compatible / Temperature Out of Range / Internal Communication Error / Sensor Voltage Error / Converter Voltage Err
HB EML3020 A-(en) LevelWave LR01 127 10 Appendix 10.1 Glossary D Dead zone Non-measurement zone. Dielectric constant An electrical property of the product to be measured used in Radar measurement. Also known as εr, DK and relative permittivity. Defines the strength of the wave reflected back to the device's signal converter. Distance The distance from the face of flange to the level (1 product) or the surface of the top product (2 or more products). See the diagrams at the end of this section.
LevelWave LR01 HB EML3020 A-(en) O Operators Users who can choose how to display measurements. They cannot configure the device in supervisor mode. P PACTware™ Software that operates and configures field devices from a remote workstation. It is not necessary to use fieldbus software or programs developed by the manufacturer. R Radar reflection Signal reflected from the surface of the tank contents.
HB EML3020 A-(en) Figure 10-1: Measurement definitions: distance 1 2 3 4 5 6 Distance Dead zone Flange facing Gas (Air) Tank height Ullage volume or mass Figure 10-2: Measurement definitions: level 1 Level 2 Volume or mass LevelWave LR01 129
LR01 HB EML3020 A-(en) Product Specifications for Intelligent Level Transmitters Product Specification: Device: LevelWave Radar Transmitters PSS EML3010 LG01 Guided Wave Radar Level Meter PSS EML3020 LR01 Free-Space Radar Level Meter LevelStar Buoyancy Transmitters PSS EML0710 244LD Intelligent Buoyancy Transmitter for Liquid Level, Interface and Density with Displacer and Torque Tube PSS EML1710 244LVP Intelligent Buoyancy Transmitter for Liquid Level, Interface and Density with Displacer PSS
