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Vega VEGAFLEX 81 Operating Instructions Manual

Tdr sensor for continuous level and interface measurement of liquids
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Download this manual See also: Operating Instructions Manual
Operating Instructions
TDR sensor for continuous level and
interface measurement of liquids
VEGAFLEX 81
Four-wire 4 ... 20 mA/HART
Coax probe
Document ID: 42280

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Summary of Contents for Vega VEGAFLEX 81

  • Page 1 Operating Instructions TDR sensor for continuous level and interface measurement of liquids VEGAFLEX 81 Four-wire 4 … 20 mA/HART Coax probe Document ID: 42280...

  • Page 2: Table Of Contents

    Saving the parameterisation data ................... 50 Set up with other systems ....................51 DD adjustment programs ....................51 Field Communicator 375, 475 ..................51 Diagnostics and servicing ....................52 Maintenance ........................52 Diagnosis memory ......................52 VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 3 11.4 Trademark ........................73 Safety instructions for Ex areas Take note of the Ex specific safety instructions for Ex applications. These instructions are attached as documents to each instrument with Ex approval and are part of the operating instructions. Editing status: 2018-11-05 VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...

  • Page 4: About This Document

    Symbols used Document ID This symbol on the front page of this instruction refers to the Docu- ment ID. By entering the Document ID on www.vega.com you will reach the document download. Information, tip, note This symbol indicates helpful additional information.

  • Page 5: For Your Safety

    During work on and with the device, the required personal protective equipment must always be worn. Appropriate use VEGAFLEX 81 is a sensor for continuous level measurement. You can find detailed information about the area of application in chapter "Product description". Operational reliability is ensured only if the instrument is properly used according to the specifications in the operating instructions manual as well as possible supplementary instructions.

  • Page 6: Eu Conformity

    That is why we have introduced an environment management system with the goal of continuously improving company environmental pro- tection. The environment management system is certified according to DIN EN ISO 14001. Please help us fulfil this obligation by observing the environmental instructions in this manual: • Chapter "Packaging, transport and storage" VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 7 2 For your safety • Chapter "Disposal" VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...

  • Page 8: Product Description

    Go to "www.vega.com", "Search". Enter the serial number. Alternatively, you can access the data via your smartphone: • Download the VEGA Tools app from the "Apple App Store" or the "Google Play Store" • Scan the Data Matrix code on the type label of the instrument or...

  • Page 9: Principle Of Operation

    Principle of operation Application area The VEGAFLEX 81 is a level sensor with coax probe for continuous level or interface measurement, suitable for applications in liquids. Functional principle - High frequency microwave pulses are guided along a steel cable or level measurement a rod.
  • Page 10 Distance to the interface d2 Distance to the level TS Thickness of the upper medium (d1 - d2) h1 Height - Interface h2 Height - Level L1 Lower medium L2 Upper medium L3 Gas phase VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...

  • Page 11: Packaging, Transport And Storage

    Storage Up to the time of installation, the packages must be left closed and stored according to the orientation and storage markings on the outside. VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...

  • Page 12: Accessories And Replacement Parts

    PACTware with VEGA-DTM is required. You can find further information in the operating instructions "Interface adapter VEGACONNECT" (Document-ID 32628). VEGADIS 81 The VEGADIS 81 is an external display and adjustment unit for VEGA plics sensors. ® For sensors with double chamber housing the interface adapter "VEGADIS adapter"...
  • Page 13 HART sensors. The adjustment is carried out via a PC with PACTware and the corresponding DTM or via smartphone/tablet with the VEGA Tools app. The connection is made via the Bluetooth inter- face integrated in PLICSMOBILE. You can find further information in the operating instructions "PLICSMOBILE T81/B81/S81"...

  • Page 14: Mounting

    Make sure before mounting that all parts of the instrument exposed to conditions the process are suitable for the existing process conditions. These are mainly: • Active measuring component • Process fitting • Process seal VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...

  • Page 15: Mounting Instructions

    Fig. 4: Vessel with conical bottom Welding work Before beginning the welding work, remove the electronics module from the sensor. By doing this, you avoid damage to the electronics through inductive coupling. Do not mount the instruments in or above the filling stream. Make sure Inflowing medium that you detect the product surface, not the inflowing product. VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 16 If there is a danger of the coaxial probe touching the vessel wall, then the probe must be fastened at the bottom end. Keep in mind that measurement is not possible below the fastening point. VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 17 4 Mounting Fig. 6: Fasten the probe 1 Coax probe Retaining sleeve VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...

  • Page 18: Connecting To Power Supply

    In the case of instrument housings with metric thread, the cable glands are screwed in at the factory. They are sealed with plastic plugs as transport protection. You have to remove these plugs before electrical connection. VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...

  • Page 19: Connecting

    When reinserting the terminal block, you should hear it snap in. Connection procedure Proceed as follows: 1. Unscrew the housing lid 2. Loosen compression nut of the cable gland and remove blind plug VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 20 The terminal blocks are pluggable and can be removed from the housing insert. To do this, lift the terminal block with a small screwdriv- er and pull it out. When inserting the terminal block again, you should hear it snap in. VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...

  • Page 21: Wiring Plan, Double Chamber Housing

    Polarity Voltage supply Voltage supply 4 … 20 mA output (active) 4 … 20 mA output (passive) Mass - output Function ground when in- stalling according to CSA (Canadian Standards Asso- ciation) VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...

  • Page 22: Double Chamber Housing With Vegadis-Adapter

    CSA (Canadian Standards Asso- ciation) Double chamber housing with VEGADIS-Adapter Electronics compartment Fig. 11: View to the electronics compartment with VEGADIS adapter for connec- tion of the external display and adjustment unit 1 VEGADIS adapter Internal plug connection Plug connector M12 x 1 VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...

  • Page 23: Supplementary Electronics

    30 s: • Internal check of the electronics • Indication of the instrument type, hardware and software version, measurement loop name on the display or PC VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 24 As soon as a plausible measured value is found, the corresponding current is output to the signal cable. The value corresponds to the actual level as well as the settings already carried out, e.g. factory setting. VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...

  • Page 25: Set Up With The Display And Adjustment Module

    The display and adjustment module is powered by the sensor, an ad- ditional connection is not necessary. Fig. 14: Installing the display and adjustment module in the electronics compart- ment of the single chamber housing VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...

  • Page 26: Adjustment System

    Adjustment keys • Key functions [OK] key: – Move to the menu overview – Confirm selected menu – Edit parameter – Save value • [->] key: – Change measured value presentation – Select list entry VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...

  • Page 27: Parameter Adjustment - Quick Setup

    [OK] will not be saved. Switch-on phase After switching on, the VEGAFLEX 81 carries out a short self-test where the device software is checked. The output signal transmits a fault signal during the switch-on phase. The following information is displayed on the display and adjustment module during the startup procedure: •...

  • Page 28: Parameter Adjustment - Extended Adjustment

    "Setup" should be selected one after the other and provided with the correct parameters. If possible, go through the items in the given sequence. The procedure is described below. The following submenu points are available: VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 29 In this menu item, you can select the application. You can choose plication between level measurement and interface measurement. You can also choose between measurement in a vessel or in a bypass or standpipe. VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 30 This menu item is only available if you have selected interface meas- electric constant urement under the menu item "Application". In this menu item you can enter the dielectric constant of the upper medium. VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 31 Adjust the requested percentage value with [+] and store with [OK]. Enter the suitable distance value in m for the empty vessel (e.g. distance from the flange to the probe end) corresponding to the per- centage value. The distance refers tot he sensor reference plane (seal surface of the process fitting). VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 32 Corresponding linearisation curves are preprogrammed for these vessels. They represent the correlation between the level percentage and vessel volume. VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 33 Fig. 17: Vessel height and socket correction value D Vessel height +h Positive socket correction value -h Negative socket correction value VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 34 All interfering signals in this section are detected by the sensor and stored. Keep in mind that with covered probe only false signals in the uncov- ered area of the probe are detected. VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 35 The procedure corresponds to the previous settings of the standard current output. See "Setup - Current output". In the main menu point "Display", the individual submenu points Display should be selected one after the other and provided with the correct VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 36 The default setting for the displayed value 2 is the electronics tem- perature. Display - Display format In this menu item, you define the display format of the measured value on the display. You can define different display formats for the two measured values. You can thus define the number of decimal positions the measured value is displayed with. The default setting for the display format is "Automatic". VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 37 If you have selected interface measurement under the menu item "Setup - Application", the peak values of the interface measurement are displayed in addition to the peak values of the level measurement. VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 38 In this menu item you can simulate measured values via the current output. This allows the signal path to be tested, e.g. through down- stream indicating instruments or the input card of the control system. VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 39 With the menu item "Setup" the echo curve it is possible to save at Diagnostics - Echo curve memory the time of setup. This is generally recommended; for using the Asset VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 40 The following table shows the default values of the instrument. De- pending on the instrument version or application, all menu items may not be available or some may be differently assigned: VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 41 Scaling level - 0 % corresponds to Scaling variable - Interface Volume Scaling unit - Interface Litres Scaling format - Interface Without decimal positions Scaling interface - 100 % corresponds to Scaling interface - 0 % corresponds to VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 42 The following data or settings for adjustment of the display and ad- justment module are saved: • All data of the menu "Setup" and "Display" • In the menu "Additional adjustments" the items "Reset, Date/Time" VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 43 0 % and 100 %. Additional settings - Scal- Since scaling is very extensive, scaling of the interface value was ing interface divided into two menu items. VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 44 Additional settings - In this menu item you can select the type and size of your probe from Probe type a list of all possible probes. This is necessary to adapt the electronics optimally to the probe. VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 45 In this menu item, the date of factory calibration of the sensor as well date as the date of the last change of sensor parameters are displayed via the display and adjustment module or via the PC. VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...

  • Page 46: Saving The Parameterisation Data

    In the display and adjust- If the instrument is equipped with a display and adjustment module, ment module the parameter adjustment data can be saved therein. The procedure is described in menu item "Copy device settings". VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...

  • Page 47: Setup With Pactware

    7 Processing system/PLC Necessary components: • VEGAFLEX 81 • PC with PACTware and suitable VEGA DTM • VEGACONNECT • HART resistance approx. 250 Ω • Processing system/PLC Note: With power supply units with integrated HART resistance (internal resistance approx. 250 Ω), an additional external resistance is not VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...

  • Page 48: Parameter Adjustment With Pactware

    7 Setup with PACTware necessary. This applies, e.g. to the VEGA instruments VEGATRENN 149A, VEGAMET 381 and VEGAMET 391). Commercially available Ex separators are also usually equipped with sufficient current limita- tion resistance. In such cases, VEGACONNECT can be connected parallel to the 4 … 20 mA cable. Parameter adjustment with PACTware...

  • Page 49: Set Up With The Quick Setup

    2 Extended adjustment Maintenance Quick setup With quick setup you can carry out the parameter adjustment of VEGAFLEX 81 for your application in just a few simple steps. The assistant-driven adjustment includes the basic settings for simple, reliable setup and commissioning. Information: If the function is inactive, then possibly no instrument is connected.

  • Page 50: Saving The Parameterisation Data

    Click to the button "Quick setup", to start the assistant-driven adjust- ment for a simplified and reliable setup. Saving the parameterisation data We recommend documenting or saving the parameterisation data via PACTware. That way the data are available for multiple use or service purposes. VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...

  • Page 51: Set Up With Other Systems

    This software is updated via the Internet and new EDDs are automatically accepted into the device catalogue of this software after they are released by the manufacturer. They can then be transferred to a Field Communicator. VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...

  • Page 52: Diagnostics And Servicing

    • Switch-on and switch-off times • Status messages (according to NE 107) • Error messages (according to NE 107) The data are read out via a PC with PACTware/DTM or the control system with EDD. VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...

  • Page 53: Status Messages

    Function check: The instrument is being worked on, the measured value is temporarily invalid (for example during simulation). This status message is inactive by default. It can be activated by the user via PACTware/DTM or EDD. VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 54 EMC interference Remove EMC influences Bit 12 of Byte 0 … 5 • • Transmission error during Exchange 4-wire power sup- Communica- external communication with ply unit or electronics tion error 4-wire power supply unit VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 55 Bit 9 of • available 100 % adjustment: Increase value Byte 14 … 24 Overfilling • Check mounting socket • Remove possible interfering signals in the close range • Use coaxial probe VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...

  • Page 56: Rectify Faults

    The operator of the system is responsible for taking suitable meas- tion occurs ures to rectify faults. The first measures are: Procedure for fault recti- fication • Evaluation of fault messages via the adjustment device • Checking the output signal • Treatment of measurement errors VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 57 "Hold value" • If the level indication is too low, the reason could be a line resist- ance that is too high VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 58 • in the close range. The sensor goes Check installation conditions • into overfill protection mode. The max. If possible, switch off the function level (0 m distance) as well as the "Overfill protection" status message "Overfill protection" are output. time VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...

  • Page 59: Exchanging The Electronics Module

    24 hour service hotline Should these measures not be successful, please call in urgent cases the VEGA service hotline under the phone no. +49 1805 858550. The hotline is also available outside normal working hours, seven days a week around the clock.

  • Page 60: Software Update

    You can find an instrument return form as well as detailed informa- tion about the procedure in the download area of our homepage: www.vega.com. By doing this you help us carry out the repair quickly and without having to call back for needed information. In case of repair, proceed as follows: •...

  • Page 61: Dismount

    Pass the instrument directly on to a specialised recycling company and do not use the municipal collecting points. If you have no way to dispose of the old instrument properly, please contact us concerning return and disposal. VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...

  • Page 62: Supplement

    Polycarbonate (with Ex d version: glass) (optional) Ʋ Ground terminal 316L Ʋ Cable gland PA, stainless steel, brass Ʋ Sealing, cable gland Ʋ Blind plug, cable gland Not suitable for hot steam applications. VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 63 50 Nm (36.88 lbf ft) Input variable Measured variable Level of liquids Min. dielectric constant of the medium ε ≥ 1.4 Output variable Output signals 4 … 20 mA/HART - active; 4 … 20 mA/HART - passive VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 64 Probe end does not touch the vessel bottom Sensor parameter adjustment No gating out of false signals carried out The output values can be assigned individually. The indication values can be assigned individually. With interface measurement = 2.0. VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 65 Typical deviation - Interface measure- ± 5 mm (0.197 in) ment Typical deviation - Total level interface ± 5 mm (0.197 in) measurement Typical deviation - Level measurement See following diagrams 5)6) Depending on the mounting conditions, deviations can occur which can be rectified by adapting the adjustment or changing the measured value offset in the DTM service mode. The dead bands can be optimized via a false signal suppression. VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 66 ±0.03 %/10 K relating to the 16 mA span or max. ±0.3 % Deviation in the current output due to digital/analogue conversion Ʋ Non-Ex and Ex-ia version < ±15 µA Ʋ Ex-d-ia version < ±40 µA Also for the additional current output (optional). VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 67 -1 … +40 bar/-100 … +4000 kPa (-14.5 … +580 psig), depending on the process fitting Time span after a sudden measuring distance change by max. 0.5 m in liquid applications, max 2 m with bulk solids applications, until the output signal has taken for the first time 90 % of the final value (IEC 61298-2). VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 68 122°F 176°F 212°F 302°F -40°C / -40°F Fig. 35: Ambient temperature - process temperature, standard version Ambient temperature Process temperature (depending on the seal material) Aluminium housing Plastic housing Stainless steel housing (precision casting) Stainless steel housing (electropolished) VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 69 0.2 … 1.5 mm² (AWG 24 … 16) Display and adjustment module Display element Display with backlight Measured value indication Ʋ Number of digits Adjustment elements Ʋ 4 keys [OK], [->], [+], [ESC] Ʋ Switch Bluetooth On/Off VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 70 Max. power consumption 4 VA; 2.1 W Potential connections and electrical separating measures in the instrument Electronics Not non-floating Reference voltage 500 V AC Conductive connection Between ground terminal and metallic process fitting Galvanic separation between electronics and metal housing parts VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...

  • Page 71: Dimensions

    Instruments with approvals can have different technical specifications depending on the version. For that reason the associated approval documents of these instruments have to be carefully noted. They are part of the delivery or can be downloaded under www.vega.com, "Instrument search (serial number)" as well as in the download area. 11.2 Dimensions The following dimensional drawings represent only an extract of all possible versions.
  • Page 72 SW 46 (1.81") (G1½, 1½ NPT) G¾, ¾ NPT, G1, 1 NPT, G1½, 1½ NPT G1½, 1½ NPT ø 21,3 mm ø 42,2 mm (0.84") (1.66") Fig. 38: VEGAFLEX 81, threaded version Sensor length, see chapter "Technical data" Coaxial version ø 21.3 mm (0.839 in) Coaxial version ø 42.2 mm (1.661 in) VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...

  • Page 73: Industrial Property Rights

    Les lignes de produits VEGA sont globalement protégées par des droits de propriété intellec- tuelle. Pour plus d'informations, on pourra se référer au site www.vega.com. VEGA lineas de productos están protegidas por los derechos en el campo de la propiedad indus- trial. Para mayor información revise la pagina web www.vega.com.
  • Page 74 Event memory 52 Repair 60 Replacement parts – Display and adjustment module with Factory calibration date 45 heating 13 False signal suppression 34 – Electronics module 13 Fault rectification 56 Reset 40 Functional principle 9 VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 75 Scaling measured value 43, 44 Sensor characteristics 46 Sensor status 37 Service hotline 59 Simulation 38 Special parameters 45 Type label 8 Type of medium 29 Units 29 Voltage supply 18, 70 VEGAFLEX 81 • Four-wire 4 … 20 mA/HART...
  • Page 76 Subject to change without prior notice © VEGA Grieshaber KG, Schiltach/Germany 2019 VEGA Grieshaber KG Phone +49 7836 50-0 Am Hohenstein 113...

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