Vega VEGAMET 381 Ex Operating Instructions Manual
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Vega VEGAMET 381 Ex Operating Instructions Manual

4 … 20 ma signal conditioning instrument
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Operating Instructions
VEGAMET 381 Ex
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Summary of Contents for Vega VEGAMET 381 Ex

  • Page 1 Operating Instructions VEGAMET 381 Ex 4 … 20 mA signal conditioning instru- ment...

  • Page 2: Table Of Contents

    Disposal ......VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...
  • Page 3 Technical data......Dimensions ......VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...

  • Page 4: About This Document

    The dot set in front indicates a list with no implied sequence. à Action This arrow indicates a single action. Sequence Numbers set in front indicate successive steps in a procedure. VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...

  • Page 5: For Your Safety

    EWG) and LVD (73/23/EWG). Conformity has been judged according to the following standards: EMC: - Emission DIN/EN 61326: 2004 Susceptibility DIN/EN 61326: 2004 incl. supplement A LVD: EN 61010-1: 2001 VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...

  • Page 6: Safety Instructions For Ex Areas

    DIN EN ISO 14001. Please help us fulfil this obligation by observing the environ- mental instructions in this manual: Chapter "Storage and transport" Chapter "Disposal" VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...

  • Page 7: Product Description

    Status indication operation [+/-] adjustment keys Insertable tag for identification of the measurement loop Function switch Mode switch for sensor input (active/passive) on the rear of the instrument LC display VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...

  • Page 8: Principle Of Operation

    You can find detailed information on the power supply in the "Technical data" in the "Supplement". 3.3 Operation The adjustment of VEGAMET 381 Ex is carried out via the integrated keys and a 16-step function switch. 3.4 Storage and transport Your instrument was protected by packaging during transport.

  • Page 9: Mounting

    "). After mounting the instrument, the slide switch is no longer accessible. 4.2 Mounting instructions 1 Place the adapter plate [1] to the rear of VEGAMET 381 Ex Carrier rail mounting (spring of the adapter plate downward) and fasten the plate with screw [2] (M4x6).
  • Page 10 1 Remove the pluggable terminal strips from the top and Front panel mounting bottom. 2 Screw pin [3] into the rear of VEGAMET 381 Ex and tighten with a screwdriver. 3 Insert VEGAMET 381 Ex from the front into the front panel [1].

  • Page 11: Connecting To Voltage Supply

    If potential equalisation currents are expected, the screen connection on the side of VEGAMET 381 Ex must be made via a ceramic capacitor (e.g. 1 nF, 1500 V). The low frequency potential equalisation currents are thus suppressed, but the protective effect against high frequency interference signals...

  • Page 12: Connection Procedure

    2 Lead the sensor cable towards the front and out of the Ex separating chamber 3 Push the Ex separating chamber towards the front until you hear it snap in VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...

  • Page 13: Wiring Plan

    N- L1+ Fig. 5: Terminal assignment VEGAMET 381 Ex Meas. data input/sensor power supply with sockets for VEGACONNECT Current output Fail safe relay Relay 2 Relay 1 Supply voltage VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...
  • Page 14 For parameter adjustment of connected HART sensors, the sockets are integrated in the terminals of the meas. data input. A VEGACONNECT can be directly plugged in without the need of an additional HART resistor. VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...

  • Page 15: Setup With The Integrated Indicating And Adjustment Unit

    Status indication operation [+/-] adjustment keys Insertable tag for identification of the measurement loop Function switch Mode switch for sensor input (active/passive) on the rear of the instrument LC display VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...

  • Page 16: Setup Procedure

    To clearly denote the measuring unit, the supplied labels can be inserted in the cover. In case several VEGAMET 381 Ex are used, each measurement loop should be clearly labelled. After being switched on, VEGAMET 381 Ex first of all carries Switch-on phase out a short self-check.
  • Page 17 The ideal calibration is at 0 % and 100 %. Because it is not always possible to empty or fill a vessel completely, any value can of course be VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...
  • Page 18 [1] or [2], enter the switching points for ON or OFF and save your settings. If necessary, proceed in the same way with relay 2 (position [3] or [4]). VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...
  • Page 19 In general a time of a few seconds will be sufficient to smooth the measured value display. VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...

  • Page 20: Application Example

    Max. adjustment: 100 % or 20 mA 6.3 Application example An upright cylindrical (linear) tank has a volume of 2700 l The max. filling volume is 2650 l, the min. filling volume 50 l VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...
  • Page 21 1 Set the function switch to position [5] (Decimal Point) 2 By pushing the [+/-] keys, you move the decimal point 3 Save the value by pushing both keys simultaneously VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...
  • Page 22 "Setup procedure". Note: If you want to change the mode (i.e. the switching function of the relays), you have to exchange the On and Off values. VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...

  • Page 23: Maintenance And Fault Rectification

    Carry out a reset à Send instrument for repair E014 Short-circuit à Eliminate short-circuit à If necessary, exchange defective sensor E015 Line break à Repair or exchange sensor cable VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...

  • Page 24: Instrument Repair

    Clean the instrument and pack it damage-proof Attach the filled in form and if necessary, a safety data sheet to the instrument Please contact the agency serving you for the address of the return shipment VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...

  • Page 25: Dismounting

    Correct disposal avoids negative effects to persons and environment and ensures recycling of useful raw materials. Materials: see "Technical data" If you cannot dispose of the instrument properly, please contact us about disposal methods or return. VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...
  • Page 26 - Full adjustment 4.1 … 20.5 mA - min. adjustment delta 300 µA Connection cable 2-wire standard cable (screening recommen- ded) Relay outputs Quantity 2x operating relay, 1x fail safe relay VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...
  • Page 27 If inductive loads or stronger currents are switched through, the gold plating on the relay contact surface will be permanently damaged. The contact is then no longer suitable for switching low-level signal circuits. VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...
  • Page 28 - Reference voltage 250 V - Isolation resistance 3.75 kV Galvanic separation between relay output and digital part - Reference voltage 250 V - Isolation resistance 4 kV VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...
  • Page 29 Supplement 9.2 Dimensions 19mm ( ") 69mm (2 ") 2mm ( ") 96mm (3 ") Fig. 8: Dimensions VEGAMET 381 Ex VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...
  • Page 30 Supplement VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...
  • Page 31 Supplement VEGAMET 381 Ex - 4 … 20 mA signal conditioning instrument...
  • Page 32 All statements concerning scope of delivery, application, practical use and operating conditions of the sensors and processing systems correspond to the information avail- able at the time of printing. © VEGA Grieshaber KG, Schiltach/Germany 2006 Subject to change without prior notice 30418-EN-060925...

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