Vega VEGAFLEX 81 Operating Instructions Manual
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Vega VEGAFLEX 81 Operating Instructions Manual

Tdr sensor for continuous level and interface measurement of liquids
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Operating Instructions

TDR sensor for continuous level and
interface measurement of liquids
VEGAFLEX 81
4 ... 20 mA/HART - four-wire
Coax probe
Document ID: 42280

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Summary of Contents for Vega VEGAFLEX 81

  • Page 1: Operating Instructions

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

  • Page 2: Table Of Contents

    Saving the parameter adjustment data ................51 Set up with other systems DD adjustment programs ....................52 Field Communicator 375, 475 ..................52 Diagnostics and servicing Maintenance ........................53 Diagnosis memory ......................53 Status messages ......................54 VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 3 11.4 Trademark ........................75 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 manual. Editing status: 2016-04-13 VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...

  • Page 4: About This Document

    This arrow indicates a single action. Sequence of actions Numbers set in front indicate successive steps in a procedure. Battery disposal This symbol indicates special information about the disposal of bat- teries and accumulators. VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...

  • 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: Namur Recommendations

    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" • Chapter "Disposal" VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...

  • Page 7: Product Description

    Go to www.vega.com "VEGA Tools" and "Instrument search". Enter the serial number. Alternatively, you can access the data via your smartphone: • Download the smartphone app "VEGA Tools" from the "Apple App Store" or the "Google Play Store" VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...

  • Page 8: Principle Of Operation

    – If necessary, further certificates 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 9 High frequency microwave impulses are guided along a steel cable or terface measurement rod. Upon reaching the product surface, a part of the microwave im- pulses is reflected. The other part passes through the upper product and is reflected by the interface. The running times to the two product layers are processed by the instrument. VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 10 Example: upper medium dielectric constant 2, lower medium at least dielectric constant 12. Gas phase (L3) • Air or gas mixture • Gas phase - dependent on the application, gas phase does not always exist (d2 = 0) VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...

  • Page 11: Packaging, Transport And Storage

    The interface adapter VEGACONNECT enables the connection of communication-capable instruments to the USB interface of a PC. For parameter adjustment of these instruments, the adjustment software PACTware with VEGA-DTM is required. You can find further information in the operating instructions "Interface adapter VEGACONNECT" (Document-ID 32628). VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 12 3 Product description The VEGADIS 81 is an external display and adjustment unit for VEGA VEGADIS 81 plics sensors. ® For sensors with double chamber housing the interface adapter "DISADAPT" is also required for VEGADIS 81. You can find further information in the operating instructions "VE- GADIS 81" (Document-ID 43814).
  • Page 13 10 m (147 ft) to the sensor by using a connection cable. You can find additional information in the operating instructions manual "External housing" (Document-ID 46802). VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...

  • Page 14: Mounting

    These are mainly: • Active measuring component • Process fitting • Process seal Process conditions are particularly: • Process pressure • Process temperature • Chemical properties of the medium • Abrasion and mechanical influences VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...

  • 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. Inflowing medium Do not mount the instruments in or above the filling stream. Make sure that you detect the product surface, not the inflowing product. VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • 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 below the fastening, a measurement is not possible. VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 17 4 Mounting Fig. 6: Fasten the probe 1 Coax probe Retaining sleeve VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...

  • 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 • 4 … 20 mA/HART - four-wire...

  • Page 19: Connection

    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 • 4 … 20 mA/HART - four-wire...
  • 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 • 4 … 20 mA/HART - four-wire...

  • Page 21: Wiring Plan, Double Chamber Housing

    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 • 4 … 20 mA/HART - four-wire...

  • Page 22: Double Chamber Housing With Disadapt

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

  • Page 23: Supplementary Electronics

    2 Second current output (II) - Voltage supply and signal output (without HART) 3 Ground terminal for connection of the cable screen Supplementary elec- The radio module PLICSMOBILE is an external GSM/GPRS radio tronics - Radio module unit for transmission of measured values and for remote parameter PLICSMOBILE adjustment. VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...

  • Page 24: Switch-On Phase

    As soon as a plausible measured value is found, the corresponding current is outputted 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 • 4 … 20 mA/HART - four-wire...

  • 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. 15: Installing the display and adjustment module in the electronics compart- ment of the single chamber housing VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...

  • Page 26: Adjustment System

    Adjustment system Fig. 17: Display and adjustment elements 1 LC display Adjustment keys • Key functions [OK] key: VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 27 [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 - Quick Setup

    Display: Settings, e.g., for language, measured value display, lighting Diagnosis: Information, e.g. on instrument status, pointer, measure- ment certainty, simulation, echo curve Additional adjustments: Reset, date/time, reset, copy function VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 29 In this menu item you can enter the probe length or have the length determined automatically by the sensor system. When choosing "Yes", then the probe length will be determined automatically. When choosing "No", you can enter the probe length manually. VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 30 "Application". In this menu item you can enter if there is a superimposed gas phase in your application. Only set the function to "Yes", if the gas phase is permanently pre- sent. VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 31 In this menu item you can enter the min. adjustment for the level. With Level interface measurement this is the minimum total level. Adjust the requested percentage value with [+] and store with [OK]. VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 32 (accept adjustment of the level measure- ment), the current setting will be displayed. If you have selected "No", you can enter the adjustment for the inter- face measurement separately. VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 33 For the socket correction you have to enter the height of the socket above the upper edge of the vessel. If the socket is lower than the up- per edge of the vessel, this value can also be negative. VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 34 The default setting is output characteristics 4 … 20 mA, failure mode < 3.6 mA. Setup - Current output In the menu item "Current output Min./Max.", you determine the reac- Min./Max. tion of the current output during operation. VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 35 This is useful if the saved false signal suppression no longer matches the metrological conditions in the vessel. Lock/unlock setup - Ad- In the menu item "Lock/unlock adjustment", you can protect the sen- justment sor parameters against unauthorized or inadvertent modification. The PIN is activated/deactivated permanently. VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 36 This menu item enables the setting of the requested national lan- guage. In the delivery status, the sensor is set to the ordered national lan- guage. Display - Displayed value In this menu item, you define the indication of the measured value on the display. You can display two different measured values. In this menu item, you define measured value 1. VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 37 "Setup - Application", the peak values of the interface measurement are displayed in addition to the peak values of the level measurement. In another window you can carry out a reset of the two peak values separately. VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 38 V. The signal strength enables an evalua- tion of the quality of the measurement. With the following functions you can zoom part sections of the echo curve. • "X-Zoom": Zoom function for the meas. distance • "Y-Zoom": 1, 2, 5 and 10x signal magnification in "V" VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 39 Under the sub-menu item "Echo curve memory" you can store the current echo curve. Parameter settings for recording the echo curve and the settings of the echo curve itself can be carried out in the adjustment software PACTware. VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 40 Default value Modified value Lock adjustment Released Measurement loop name Sensor Units Distance unit: mm Temperature unit: °C Probe length Length of the probe Ex factory Type of medium Liquid Application Level, vessel VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 41 First HART variable (PV) Current output - Output characteristics 0 … 100 % correspond to 4 … 20 mA Current output - Reaction in case of failure ≤ 3.6 mA Current output - Min. 3.8 mA VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 42 Device memory - Measured value memory - Stop Not active with measured value Device memory - Measured value memory - Stop Not active recording when memory is full VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 43 Since scaling is very extensive, scaling of the level value was divided ing level into two menu items. Additional settings - Scal- In menu item "Level 1" you define the scaling variable and the scaling ing level 1 unit for the level value on the display, e.g. volume in l. VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 44 If you have selected "No", you can enter the scaling for the interface separately. Additional settings - Scal- In menu item "Interface (2)" you define the scaling format on the ing interface (2) display and the scaling of the interface measured value for 0 % and 100 %. VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 45 In this menu item you gain access to the protected area where Special parameters you can enter special parameters. In exceptional cases, individual parameters can be modified in order to adapt the sensor to special requirements. Change the settings of the special parameters only after having con- tacted our service staff. VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...

  • Page 46: Saving The Parameter Adjustment Data

    If it is necessary to exchange a sensor, the display and adjustment module is inserted into the replacement instrument and the data are likewise written into the sensor via the menu item "Copy sensor data". VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...

  • Page 47: Setup With Pactware

    1 USB cable to the PC 2 Interface adapter VEGACONNECT Sensor Connection via HART Fig. 20: Connecting the PC via HART to the signal cable 1 VEGAFLEX 81 Voltage supply 4 … 20 mA signal output 4 HART resistance approx. 250 Ω (optional depending on processing) 5 Connection cable with 2 mm pins and terminals 6 VEGACONNECT 7 Processing system/PLC Necessary components: • VEGAFLEX 81 VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...

  • Page 48: Parameter Adjustment With Pactware

    Further setup steps are described in the operating instructions manu- al "DTM Collection/PACTware" attached to each DTM Collection and which can also be downloaded from the Internet. Detailed descrip- tions are available in the online help of PACTware and the DTMs. VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...

  • Page 49: Set Up With The Quick Setup

    It allows fast, convenient adjustment of the most important parameters to adapt the sensor quickly to standard applications. To use it, select the function "Quick setup" in the start screen. VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 50 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 51: Saving The Parameter Adjustment Data

    7 Setup with PACTware Saving the parameter adjustment data We recommend documenting or saving the parameter adjustment data via PACTware. That way the data are available for multiple use or service purposes. VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...

  • Page 52: Set Up With Other Systems

    This software is updated via the Internet and new EDDs are automatically taken over 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 • 4 … 20 mA/HART - four-wire...

  • Page 53: Diagnostics And Servicing

    Echo curve of the setup: This is used as reference echo curve for the measurement conditions during setup. Changes in the measure- ment conditions during operation or buildup on the sensor can thus be recognized. The echo curve of the setup is stored via: • PC with PACTware/DTM VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...

  • Page 54: Status Messages

    PACTware/DTM or EDD. Out of specification: The measured value is unstable because the instrument specification is exceeded (e.g. electronics temperature). This status message is inactive by default. It can be activated by the user via PACTware/DTM or EDD. Maintenance: Due to external influences, the instrument function is limited. The measurement is affected, but the measured value is VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 55 – Error in the calibration car- – Exchanging the electronics Bit 8 of Byte 0 … 5 ried out in the factory – Send instrument for repair Error in the – Error in the EEPROM calibration VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 56 Bit 9 of Byte 14 …24 range not available – 100 % adjustment: Increase Overfilling value – Check mounting socket – Remove possible interfering signals in the close range – Use coaxial probe VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 57 Bit 5 of Byte 14 … 24 echo during operation lation and/or parameter no measured adjustment value avail- able – Process component or – Clean or exchange process probe contaminated or component or probe defective VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...

  • Page 58: Rectify Faults

    22 mA or less than 3.6 mA the sensor defective Treatment of measure- The below tables show typical examples for application-relevant ment errors measurement errors. There are two measurement errors: • Constant level • Filling • Emptying VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 59 4. Measured value re- – Turbulence on the product – Check parameters, change if mains momentarily surface, quick filling necessary, e.g. in dosing ves- unchanged during fill- sel, reactor ing and then jumps to time the correct level VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...

  • Page 60: 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 61: Software Update

    By doing this you help us carry out the repair quickly and without hav- ing to call back for needed information. If a repair is necessary, please proceed as follows: • Print and fill out one form per instrument • Clean the instrument and pack it damage-proof VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 62 Attach the completed form and, if need be, also a safety data sheet outside on the packaging • Please contact the agency serving you to get the address for the return shipment. You can find the agency on our home page www.vega.com. VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...

  • Page 63: Dismount

    Pass the instrument directly on to a spe- cialised recycling company and do not use the municipal collecting points. These may be used only for privately used products according to the WEEE directive. VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...

  • Page 64: 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 • 4 … 20 mA/HART - four-wire...
  • Page 65 10 Nm (7.376 lbf ft) Ʋ Aluminium/Stainless steel housing max. 50 Nm (36.88 lbf ft) Input variable Measured variable Level of liquids Min. dielectric constant of the medium ε ≥ 1.4 VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 66 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 • 4 … 20 mA/HART - four-wire...
  • Page 67 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 installation conditions, deviations can occur which can be rectified by adapting the adjust- ment or changing the measured value offset in the DTM service mode The dead bands can be optimized via a false signal suppression. VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 68 ±0.03 %/10 K relating to the 16 mA span max. ±0.3 % Deviation on the current output through analogue/digital 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 • 4 … 20 mA/HART - four-wire...
  • Page 69 -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 • 4 … 20 mA/HART - four-wire...
  • Page 70 176°F 212°F 302°F -40°C / -40°F Fig. 36: 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 • 4 … 20 mA/HART - four-wire...
  • Page 71 0.2 … 2.5 mm² (AWG 24 … 14) Ʋ Stranded wire with end sleeve 0.2 … 1.5 mm² (AWG 24 … 16) Display and adjustment module Display element Display with backlight Measured value indication Ʋ Number of digits VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 72 Ʋ up to 2000 m (6562 ft) above sea level III Ʋ up to 5000 m (16404 ft) above sea III - Only with connected overvoltage protection level Ʋ up to 5000 m (16404 ft) above sea level Degree of soiling VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...

  • Page 73: 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, "VEGA Tools" and "Instrument search" as well as in the download area. 11.2 Dimensions The following dimensional drawings represent only an extract of all possible versions.
  • Page 74 SW 41 (1.61") (G1, 1 NPT) 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. 39: 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 • 4 … 20 mA/HART - four-wire...

  • Page 75: 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 76 Factory calibration date 46 – Electronics module 12 False signal suppression 35 Fault rectification 58 Reset 40 Functional principle 8 Scaling measured value 43, 44 Sensor characteristics 46 Gas phase 30 Sensor status 37 Grounding 19 VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 77 INDEX Service hotline 60 Simulation 39 Special parameters 45 Terminal compartment – Double chamber housing 21, 22 Type label 7 Type of medium 30 Units 29 Voltage supply 18, 72 VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 78 Notes VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 79 Notes VEGAFLEX 81 • 4 … 20 mA/HART - four-wire...
  • Page 80 Subject to change without prior notice © VEGA Grieshaber KG, Schiltach/Germany 2016 VEGA Grieshaber KG Phone +49 7836 50-0 Am Hohenstein 113...

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