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 - two-wire
Rod and cable probe
Document ID: 41824

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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 - two-wire Rod and cable probe Document ID: 41824...

  • Page 2: Table Of Contents

    Parameter adjustment with PACTware ................56 Set up with the quick setup ..................... 57 Saving the parameterisation data ................... 58 Set up with other systems DD adjustment programs ....................59 Field Communicator 375, 475 ..................59 VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 3 11.4 Trademark ........................93 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: 2017-02-02 VEGAFLEX 81 • 4 … 20 mA/HART - two-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 - two-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 - two-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 - two-wire...

  • Page 8: Principle Of Operation

    The respective scope of delivery results from the order specification. Principle of operation Application area The VEGAFLEX 81 is a level sensor with cable or rod probe for continuous level or interface measurement, suitable for applications in liquids. Functional principle -...
  • Page 9 Fig. 3: Interface measurement 1 Sensor reference plane (seal surface of the process fitting) d1 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 • 4 … 20 mA/HART - two-wire...

  • Page 10: 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 • 4 … 20 mA/HART - two-wire...

  • Page 11: 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 12 Basic segments: 20 … 5900 mm (0.79 … 232 in) • Rod segments: 20 … 5900 mm (0.79 … 232 in) • Curved segments: 100 x 100 mm (3.94 … 3.94 in) VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 13 The length and the process fittings can be configured individually. No different connection versions available. You can find further information in the operating instructions manual "Bypass tube VEGAPASS 81". Centering If you mount the VEGAFLEX 81 in a bypass tube or standpipe, you have to avoid contact to the bypass tube by using a spacer at the probe end. You can find additional information in the operating instructions manual "Centering". Fixing facility If there is a risk of the cable probe touching the vessel wall during operation due to product movements or agitators, etc., the measuring...

  • Page 14: Mounting

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

  • Page 15: Mounting Instructions

    Mounting instructions Installation position Mount VEGAFLEX 81 in such a way that the distance to vessel instal- lations or to the vessel wall is at least 300 mm (12 in). In non-metallic vessels, the distance to the vessel wall should be at least 500 mm (19.7 in).
  • Page 16 In such cases, always carry out a false signal suppression after mounting. You can find further information under "Setup procedure". ≤ 150 mm ( 5.91") DN25 ... DN150 ≤ 100 mm ( 3.94") > DN150 ... DN200 Fig. 6: Mounting socket When welding the socket, make sure that the socket is flush with the vessel top. VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 17 - measurement in these areas is not possible (dead band). The length of the cable can be used all the way to the end only when measuring conductive products. These blocking distances for different mediums are listed VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 18 If durability is no problem, we recommend the use of uncoated metal standpipes. When the VEGAFLEX 81 is used in bypass tubes, contact with the tube wall must be avoided. We recommend for this purpose a cable probe with centering weight.
  • Page 19 It does not matter if the standpipe is perforated or slotted for better mixing. Measuring probes can be mounted in standpipes up to DN 200. VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 20 If durability is no problem, we recommend the use of uncoated metal standpipes. When the VEGAFLEX 81 is used in standpipes, contact with the tube wall must be avoided. We recommend for this purpose a cable probe with centering weight.
  • Page 21 If there is a danger of the rod probe touching the vessel wall, fasten the probe at the bottom end. Keep in mind that measurement is not possible below the fastening point. VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 22 ø < 8 mm (ø < 0.315") 550 mm (21.65") Fig. 12: Tensioning component for cable versions Holding screw M8 Holding screw M12 L1 Max. measuring length Probe length L = L1 + 270 mm (10.63 in) VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 23 To compensate for the resulting changes in signal runtime, let the instrument determine the probe length automatically. You can find further information in the supplementary instructions of the rod and cable components. VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...

  • Page 24: Connecting To Power Supply

    The signal conditioning instruments VEGAMET and VEGASCAN Connection to signal con- ditioning instruments have digital sensor recognition. When connecting VEGAFLEX 81, an up-to-date version of the signal conditioning instrument software is required. For a software update go to "www.vega.com/downloads" and "Software".

  • Page 25: Connecting

    Connection procedure Proceed as follows: 1. Unscrew the housing lid 2. If a display and adjustment module is installed, remove it by turn- ing it slightly to the left. VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 26 6. Insert the wire ends into the terminals according to the wiring plan Information: Solid cores as well as flexible cores with wire end sleeves are insert- ed directly into the terminal openings. In case of flexible cores without end sleeves, press the terminal from above with a small screwdriver, the terminal opening is then free. When the screwdriver is released, the terminal closes again. VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...

  • Page 27: Wiring Plan, Single Chamber Housing

    For display and adjustment module or interface adapter For external display and adjustment unit 4 Ground terminal for connection of the cable screen Wiring plan, double chamber housing The following illustrations apply to the non-Ex as well as to the Ex-ia version. VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 28 For display and adjustment module or interface adapter For external display and adjustment unit 4 Ground terminal for connection of the cable screen Terminal compart- ment - Radio module PLICSMOBILE Status SIM-Card Test Fig. 18: Terminal compartment - Radio module PLICSMOBILE Voltage supply You can find detailed information on connection in the supplementary instructions "PLICSMOBILE GSM/GPRS radio module". VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...

  • Page 29: Wiring Plan, Ex-D-Ia Double Chamber Housing

    Internal connection to the plug connector for external display and adjust- ment unit (optional) Note: HART multidrop mode is not possible when using an Ex-d-ia instru- ment. Terminal compartment 4...20mA Fig. 20: Connection compartment - Ex-d-ia double chamber housing Voltage supply, signal output 2 Ground terminal for connection of the cable screen VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...

  • Page 30: Double Chamber Housing With Vegadis-Adapter

    Pin 1 Pin 2 Pin 3 Pin 4 Contact pin Colour, connection ca- Terminal, electronics ble in the sensor module Pin 1 Brown Pin 2 White Pin 3 Blue Pin 4 Black VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...

  • Page 31: Wiring Plan - Version Ip 66/Ip 68, 1 Bar

    Additional 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 - two-wire...

  • Page 32: 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 - two-wire...

  • Page 33: 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. 26: Installing the display and adjustment module in the electronics compart- ment of the single chamber housing VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...

  • Page 34: Adjustment System

    Adjustment system Fig. 28: Display and adjustment elements 1 LC display Adjustment keys • Key functions [OK] key: VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 35 [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 36: 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 - two-wire...
  • Page 37 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 - two-wire...
  • Page 38 "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 - two-wire...
  • Page 39 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 - two-wire...
  • Page 40 0 … 999 s in this menu item. If you have selected interface measurement under the menu item "Application", you can adjust the damping for the level and the inter- face separately. VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 41 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 - two-wire...
  • Page 42 The default setting is output characteristics 4 … 20 mA, fault 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 - two-wire...
  • Page 43 The menu item "Delete" is used to completely delete an already cre- ated false signal suppression. This is useful if the saved false signal suppression no longer matches the metrological conditions in the vessel. VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 44 The submenu points are described below. Display - Menu language This menu item enables the setting of the requested national lan- guage. In delivery status, the sensor is set to the ordered national language. VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 45 In delivery status, the lighting is switched on. Diagnostics - Device In this menu item, the device status is displayed. status When the instrument displays a failure message, you can here get detailed information on the failure reason. VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 46 The values are displayed in the menu item "Peak values Ad- ditional". This menu item displays the peak values of the electronics tempera- ture as well as the dielectric constant. VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 47 During simulation, the simulated value is outputted as 4 … 20 mA cur- rent value and digital HART signal. Push the [ESC] key to deactivate the simulation. Information: The simulation is terminated automatically 60 minutes after the activa- tion of the simulation. VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 48 After a reset, certain parameter adjustments made by the user are Reset reset. Note: After this menu window, the reset process is carried out. No further safety inquiry follows. The following reset functions are available: VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 49 Distance: Probe length - take dead band into account Setup Damping - Level 0.0 s Damping - Interface 0.0 s Setup Linearisation type Linear Linearisation - Socket correction 0 mm Linearisation - Vessel height Probe length VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 50 Display format 2 Automatically Backlight Switched on Menu - Additional adjustments Menu Menu item Default value Additional settings 0000 Date Actual date Time Actual time Time - Format 24 hours Probe type Device-specific VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 51 Additional settings - In menu item "Scaling variable" you define the scaling variable and Scaling level - Scaling the scaling unit for the level value on the display, e.g. volume in l. variable VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 52 Since scaling is very extensive, scaling of the level value was divided rent output into two menu items. Additional settings - In menu item "Current output, variable" you specify which measured Current output - Current variable the current output refers to. output, meas. variable VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 53 In this menu item you gain access to the protected area where cial 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 - two-wire...

  • Page 54: Saving The Parameterisation 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 device settings". VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...

  • Page 55: Setup With Pactware

    5 Interface adapter, for example VEGACONNECT 4 Note: With power supply units with integrated HART resistance (internal resistance approx. 250 Ω), an additional external resistance is not necessary. This applies, e.g. to the VEGA instruments VEGATRENN 149A, VEGAMET 381, VEGAMET 391. Common Ex separators are VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...

  • Page 56: Parameter Adjustment With Pactware

    In the standard version, all functions for complete setup are already included. An assistant for simple project configuration simplifies the adjustment considerably. Saving/printing the project as well as import/export functions are also part of the standard version. VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...

  • Page 57: 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 58: 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 • 4 … 20 mA/HART - two-wire...

  • Page 59: 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 • 4 … 20 mA/HART - two-wire...

  • Page 60: 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 • Control system with EDD VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...

  • Page 61: Status Messages

    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 still valid. Plan in maintenance for the instrument because a failure is expected in the near future (e.g. due to buildup). VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 62 Carry out a reset Bit 9 of Byte 0 … 5 • • Error when carrying out a Repeat setup Error in the reset instrument • False signal suppression settings faulty VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 63 Use coaxial probe • • S602 Compensation echo super- 100 % adjustment: Increase Bit 10 of Byte 14 … 24 imposed by medium value Level with- in the search range, com- pensation echo VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...

  • Page 64: Rectify Faults

    Procedure for fault recti- The first measures are: fication • Evaluation of fault messages via the adjustment device • Checking the output signal • Treatment of measurement errors VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 65 "Hold value" • If the level indication is too low, the reason could be a line resist- ance that is too high VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 66 0 m distance signals in the close range. The Check installation conditions • sensor goes into overfill protec- If possible, switch off the func- tion mode. The max. level (0 m tion "Overfill protection" time distance) as well as the status message "Overfill protection" are outputted. VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...

  • Page 67: 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 68: Exchanging The Cable/Rod

    6. Exert counterforce with the second fork spanner and tighten the rod or cable on the flat surfaces with the following torque. Rod ø 8, cable ø 2 and 4: 6 Nm (4.43 lbf ft) Rod ø 12: 10 Nm (7.37 lbf ft) VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 69 7. Cable with gravity weight: Fasten cable with the pins, torque 7 Nm (5.16 lbf ft) Cable with centering weight: Fasten cable with the pins, torque 7 Nm (5.16 lbf ft) and fix the clamping part on the centering weight. VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...

  • Page 70: Software Update

    By doing this you help us carry out the repair quickly and without hav- ing to call back for needed information. VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 71 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 - two-wire...

  • Page 72: 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 - two-wire...

  • Page 73: Supplement

    Ʋ Inspection window in housing cover 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 VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 74 ±(2 mm + 0.05 % of the cable length) Lateral load Ʋ Rod: ø 8 mm (0.315 in) 10 Nm (7.38 lbf ft) Ʋ Rod: ø 12 mm (0.472 in) 30 Nm (22.13 lbf ft) VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 75 Ʋ Second HART value (SV) Distance to the level Ʋ Third HART value (TV) Measurement certainty, level Ʋ Fourth HART value (QV) Electronics temperature The output values can be assigned individually. VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 76 Probe end does not touch the vessel bottom Sensor parameter adjustment No gating out of false signals carried out The indication values can be assigned individually. The indication values can be assigned individually. With interface measurement = 2.0 VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 77 Typical deviation - Interface measure- ± 5 mm (0.197 in) ment Typical deviation - Total level interface See following diagrams 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 • 4 … 20 mA/HART - two-wire...
  • Page 78 -10 mm (-0.591 ") 0,15 m 0,3 m 0,07 m (5.906 (11.811 " ") (2.756 ") 0,05 m (1.97 ") Fig. 48: Deviation VEGAFLEX 81 in rod version in oil Dead band (no measurement possible in this area) Probe length VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 79 -15 mm (-0.591 " 0,15 m 0,3 m 0,05 m (5.906 " (11.811 ") (1.969 ") 0,08 m (3.15 ") Fig. 50: Deviation VEGAFLEX 81 in cable version (ø 2 mm/0.079 in), in medium oil Dead band (no measurement possible in this area) Probe length VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 80 -2 mm (-0.079 ") -15 mm (-0.591 ") 0,1 m 0,2 m 0,07 m (3.937 (7.874 " " (2.756 ") Fig. 52: Deviation VEGAFLEX 81 in cable version (ø 4 mm/0.157 in, PFA-coated) in water Dead band (no measurement possible in this area) Probe length VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 81 Positive values mean that the measured distance is too large, negative values that the measured distance is too small. Also for the additional current output (optional). VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 82 Ʋ EPDM (A+P 75.5/KW75F) -40 … +150 °C (-40 … +302 °F) 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 - two-wire...
  • Page 83 176°F 212°F 302°F -40°C / -40°F Fig. 54: 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 - two-wire...
  • Page 84 0.2 … 1.5 mm² (AWG 24 … 16) Display and adjustment module Display element Display with backlight Measured value indication Ʋ Number of digits Ʋ Size of digits W x H = 7 x 13 mm Adjustment elements 4 keys VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 85 Reverse voltage protection Integrated Permissible residual ripple - Non-Ex, Ex-ia instrument Ʋ for 9.6 V< U < 14 V ≤ 0.7 V (16 … 400 Hz) Ʋ for 18 V< U < 36 V ≤ 1.0 V (16 … 400 Hz) VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...

  • Page 86: 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 via "VEGA Tools" and "Instrument search" as well as in the download area.
  • Page 87 ~ 87 mm (4.57") (3.43") ø 86 mm ø 86 mm (3.39") (3.39") M16x1,5 M20x1,5 M20x1,5/ ½ NPT M20x1,5/ ½ NPT Fig. 57: Housing versions with protection rating IP 66/IP 68 (0.2 bar) - with integrated display and adjustment module the housing is 9 mm/0.35 in higher Aluminium - single chamber Aluminium - double chamber VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 88 (3.11") M16x1,5 M20x1,5/ ½ NPT M20x1,5/ M20x1,5/ ½ NPT ½ NPT Fig. 59: Housing versions with protection rating IP 66/IP 68 (0.2 bar) - with integrated display and adjustment module the housing is 9 mm/0.35 in higher Stainless steel single chamber (electropolished) Stainless steel single chamber (precision casting) Stainless steel double chamber housing (precision casting) VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 89 (3.39") (3.15") (3.11") M16x1,5 M20x1,5 M20x1,5/ ½ NPT M20x1,5/ ½ NPT Fig. 60: Housing version with protection rating IP 66/IP 68 (1 bar) - with integrated display and adjustment module the housing is 9 mm/0.35 in higher Stainless steel single chamber (electropolished) Stainless steel single chamber (precision casting) Stainless steel double chamber housing (precision casting) VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 90 ø 2 mm (0.08") ø 16 mm ø 16 mm ø 16 mm (0.63") (0.63") (0.63") ø 20 mm ø 20 mm ø 20 mm (0.79") (0.79") (0.79") Fig. 61: VEGAFLEX 81, threaded version with gravity weight (all gravity weights with thread M8 for eye-bolt) Sensor length, see chapter "Technical data" Cable version ø 2 mm (0.079 in) with gravity weight Cable version ø 4 mm (0.157 in) with gravity weight Cable version with temperature adapter VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 91 G¾, ¾ NPT, G1, 1 NPT, G1½, 1½ NPT ø 4 mm (0.16") ø 4 mm (0.16") ø 2 mm (0.08") Fig. 62: VEGAFLEX 81, threaded version Sensor length, see chapter "Technical data" ø 40 mm (1.57 in) ø 45 mm (1.77 in) ø 75 mm (2.95 in) ø 95 mm (3.74 in) Cable version ø 2 mm (0.079 in) with centering weight (see supplementary instructions "Centering") Cable version ø 4 mm (0.157 in) PFA-coated with centering weight (see supplementary instructions "Center- ing") Cable version ø 4 mm (0.157 in) with centering weight (see supplementary instructions "Centering") VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 92 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 8 mm ø 12¨mm (0.32") (0.47") Fig. 63: VEGAFLEX 81, threaded version Sensor length, see chapter "Technical data" Rod version ø 8 mm (0.315 in) Rod version ø 12 mm (0.472 in) VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...

  • Page 93: 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 94 Factory calibration date 54 False signal suppression 43 – Electronics module 12 – Fixing facility 13 Fault rectification 64 – Rod components 12 Functional principle 8 – Spacer 13 Reset 48 Gas phase 38 VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 95 INDEX Scaling measured value 51, 52 Sensor characteristics 54 Sensor status 45 Service hotline 67 Simulation 47 Special parameters 53 Type label 7 Type of medium 38 Units 37 VEGAFLEX 81 • 4 … 20 mA/HART - two-wire...
  • Page 96 Subject to change without prior notice © VEGA Grieshaber KG, Schiltach/Germany 2017 VEGA Grieshaber KG Phone +49 7836 50-0 Am Hohenstein 113...

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