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Vega EL 21 Operating Instructions Manual

Capacitive electrodes el series 4...20 ma - compact
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Level and Pressure
Operating Instruction
Capacitive electrodes EL
4 ... 20 mA - compact

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  • Page 1 Level and Pressure Operating Instruction Capacitive electrodes EL 4 … 20 mA - compact...

  • Page 2: Safety Information

    Safety information The described module must only be installed and operated as described in this operating instruction. Please note that other action can cause damage for which VEGA does not take responsibility. Capacitive electrodes EL 4 … 20 mA - compact...

  • Page 3: Table Of Contents

    Contents Contents Safety information ................. 2 Product description 1.1 Function and configuration ........... 4 1.2 Types and versions ............... 5 1.3 Technical data ............... 7 1.4 Approvals ................13 1.5 Dimensions ................. 14 1.6 Type plate ................16 Mounting 2.1 Mounting instructions ............17 Electrical connection 3.1 Connection instructions ............

  • Page 4: Product Description 1.1 Function And Configuration

    Product description 1 Product description Electrode and vessel wall are the capacitor 1.1 Function and configuration plates. The medium is the dielectricum. Due to the higher dielectric constant figure (DK-value) Capacitive electrodes series EL detect levels of of the medium against air, the capacitance of virtually any medium unaffected whether the capacitor increases with raising covering of liquids, powders or pastes.

  • Page 5: Types And Versions

    Product description 1.2 Types and versions Type Version Continuous • • • • • • • • • Partly-insulated • • • Fully-insulated • • • • • • Oscillators CAP E32 EX • • • • • • • •...
  • Page 6 Product description Type Version Isolation material PTFE • • • • • • • • PE/PA 12 • • • • • Concentric tube Steel • • • StSt (1.4435) • • • Screening tube (option) Steel • • • •...

  • Page 7: Technical Data

    (St 37), 1.4571 (StSt), Aluminium Thread A or 1 " NPT Flange flange versions Electrode Material EL 11 1.4435 (316 L) EL 21 steel (St 37) EL 31 1.4401 (316 L) EL 24, 42 1.4571 (316 L) Length - rod max.
  • Page 8 Product description Supply voltage 12 … 36 V DC for Ex-applications note the stated permissible electrical connection values in the certificate. Potential separation min. 500 V AC Load in Ω 1000 Supply voltage in V Accessory Straining spring of 1.4571 - length approx.
  • Page 9 Product description fully and partly insulated electrodes react Oscillator differently (see also “Fig. 1.3 Humidity change“). Whereby the measured value on fully The oscillator CAP E32 (H) Ex with the patented insulated electrodes raises with steady level, processing (phase selective admittance the measured value on partly insulated processing) extends the application range of electrodes drops.
  • Page 10 PTFE and FEP are approved as isolating from 100°C unpressurized, material. max. 150°C for °C –50 30 min. Mechanical connection, 1.4571 Isolation Electrode type EL 11 EL 21 EL 21 (flange) –50 200 °C Temperature EL 24 adapter EL 29 EL 31 EL 33...
  • Page 11 Product description Mechanical connection, Aluminium Isolation Electrode type –30 °C EL 11 EL 21 EL 31 EL 33 EL 42 EL 52 EL 53 –30 °C Mechanical connection, PP, PVC, PTFE, screwed adapter Isolation PP: unpressurized up to 80°C Electrode type PTFE: 3 bar, -20 …...
  • Page 12 Product description Product description Electronics temperature The following medium and ambient temperatures must be kept, so that the limit temperature on the electronics is not exceeded. Temperature class T4 (or no Ex) Without temperature adapter - medium temperature -40°C … +135°C - ambient temperature -40°C …...

  • Page 13: Approvals

    6.3 of this VDE. The compliance of the caused by electrostatic discharges. Note the instruments with these requirements is contents of the warning label. confirmed by Messrs. VEGA in a manufacturer • The explosion protection of the instrument declaration. used is only ensured when the limit temperatures stated in the certificate are not exceeded.

  • Page 14: Dimensions

    Product description 1.5 Dimensions Dimensions of the capacitive electrodes type EL … Ex 0 Type EL 21 (fully insulated) Type EL 11 Type EL 24 (fully insulated, (Ex 0) (partly insulated) for adhesive products) (Ex 0) (Ex 0) 32,5 32,5...

  • Page 15: Product Description

    Product description Type EL 53 (fully insulated) Housing Type EL 52 (fully insulated) 32,5 32,5 32,5 M20x1,5 M20x1,5 M20x1,5 ø11 ø15,5 ø6 ø8 Housing of plastic / Aluminium Screwed adapter of PP or PTFE ø40 ø40 ø20 ø20 ø40 ø40 L (min.

  • Page 16: Type Plate

    Configuration of the type plate (example) 1.6 Type plate Before mounting and electrical connection ® VEGA EL 11 please check if you use the suitable instrument. type EL11EXO.XGBVSTXXVKXX Therefore note the type plate which is located see PTB Nr. EX-98.E.2085 EEx ia IIC T6...

  • Page 17: Mounting 2.1 Mounting Instructions

    Mounting 2 Mounting Extraction forces 2.1 Mounting instructions In case of strong extraction forces e.g. during filling or settling of solids, high tensile loads can General be caused. Different mediums and requirements to the measurement require various installations. In these cases use for short measuring Hence the following instructions should be distances a rod electrode, as a rod is generally noted.
  • Page 18 Mounting Filling opening Shortening of the electrode Install the electrode such that it does not The dimensions of fully insulated electrodes are protrude directly into a strong filling stream. fixed and must hence not be modified. Each Should such an installation place be necessary, modification will destroy the instrument.
  • Page 19 Mounting Note that the mechanical connection of the Cable electrodes in solids electrode is electrically conductive connected Dependent on the kind of solid and position or with the vessel to ensure sufficient earth. kind of filling, the cable electrode can “float“ despite of the gravity weight.
  • Page 20 Mounting With electrodes, delivering continuous measured values, the electrode must only be installed vertically. Should the installation from top not be possible, the electrodes can also be mounted laterally (fig. 2.5) Under the accessory in our pricelist you find a screening tube and a closing cone or a bent rod electrode by which the electrode can be also mounted laterally.
  • Page 21 Mounting Note when installing the electrodes into the emptying opening in the vessel, the electrode vessel, that material cones can be caused with must be installed appropriately. To compensate solids which can change the switch point. We the measuring errors caused by the material recommend to choose an installation place cone, you should install the electrode at a where the electrode detects an average value...

  • Page 22: Electrical Connection 3.1 Connection Instructions

    Electrical connection 3 Electrical connection Note The oscillator is independent of the electrode 3.1 Connection instructions and can be exchanged locally. Note Switch off the power supply before starting connection work. Connect supply voltage according to the 4 … 20 mA following connection diagrams.
  • Page 23 Electrical connection Skilled staff Instruments operated in Ex-areas must only be mounted by skilled staff. They must note the mounting regulations and the supplied EC-type approvals and conformity certificates. When capacitive electrodes are mounted on vessels which must be protected according to TRbF 100 no.
  • Page 24 Electrical connection Vessel with cathodic corrosion protection Capacitive electrodes EL 4 … 20 mA - compact...
  • Page 25 Electrical connection Vessel without cathodic corrosion protection Capacitive electrodes EL 4 … 20 mA - compact...

  • Page 26: Set-Up 4.1 General Adjustment

    4.1 General adjustment PC with adjustment program VVO With the adjustment program VVO V. 2.30 (VEGA Visual Operating) on the PC you can The figures in brackets relate to the pictures adjust the capacitive electrode in conjunction under chapter “3 Electrical connection“. With with oscillator CAP E 32 H Ex very comfortably.

  • Page 27: Adjustment - Oscillators Cap E32 Ex And Cap E32 H Ex

    Set-up 4.2 Adjustment - Functional description Oscillators CAP E32 Ex and CAP E32 H Ex 0 Operate Basic position The instrument should be in this position during measurement. In mode Operate the actual measured value is transmitted. The plus and minus keys do not function.
  • Page 28 Set-up value to a known level, you can modify the current with the plus and minus keys. Each time 4 Reverse characteristics you push the key, the current value changes in With this function you can reverse the 10 µA-steps. characteristics of the current output.
  • Page 29 Set-up 1 Min. adjustment 4 mA at 0 pF measured separately, the capacitance value is corrected by the calculation of the ohmic 2 Max. adjustment 20 mA at 3000 pF resistance so that measuring errors due to 3 Integration time 0,5 s build-up or change in the product humidity are 4 Reverse characteristics...

  • Page 30: Adjustment With Vvo

    In the window User identification you are asked for the name and the password. • For set-up ( planning ) enter under name: VEGA and under password again: VEGA . It does not matter if you use capital or small letters.
  • Page 31 Set-up Measuring system Measurement loop In this sensor you can choose your appropriate In this window you can make the measurement electrode. You can see the electrode type on loop designation. the type plate of the instrument. Choose the correct electrode out of the list, e.g. Measurement loop no.
  • Page 32 Set-up Communication Max. adjustment You can determine the adjustments for data There must be max. level in the vessel. When transmission. you push the button Save, the current value for the actual max. level is set to 20 mA. The Options sensor value can be also read out in pF.
  • Page 33 Set-up When you know already the electrode Conditioning capacitance of a second similar measurement In this window the following functions are loop (same electrode, same installation available: conditions, same medium) you can also carry - scaling out the dry adjustment in pF. - linearisation - integration time First carry out an offset correction with...
  • Page 34 Set-up ° Output - Current output Mode 2 = Phase angle 45 In this window you can change the The capacitance and the ohmic resistance are preadjustments for the current output. Push the measured separately, the capacitance value is button Save to tranfer the modified values. corrected by calculation with the ohmic resistance, so that measuring errors by Failure mode...
  • Page 35 • print When you use the level maintenance, you can • view choose all functions except configuration. • backup The password for this level is: VEGA. • restore configuration • edit database Planning • user level When you choose the level planning all •...
  • Page 36 Set-up ® 4.4 Adjustment with HART With this function you can start a new connection. This function can also be activated handheld with key F8. The capacitive electrodes EL with oscillator Modem ® CAP E32 H Ex are suitable for HART -protocols This window enables the adjustments for data ®...
  • Page 37 (fig. 3, page 38) ® When you operate a sensor suitable for HART on a VEGA-signal conditioning instrument, you have to provide the sensor connection on the signal conditioning instrument with a resistor of the following table for the duration of the ®...
  • Page 38 Set-up – Ri < 250 Fig. 1 – Ri > 250 Fig. 2 VEGAMET VEGALOG 250 Ω – Fig. 3 Capacitive electrodes EL 4 … 20 mA - compact...
  • Page 39 Set-up transmitted to the sensor. Adjustment steps Another safety enquiry asks you to switch over your system from manual to automatic On the following pages you see the menu plan operation. Push “ OK“ Generic: SENSOR ® to the HART -handheld in relation with capacitive electrodes.
  • Page 40 Set-up ® HART -menu plan Set-up the sensor in the sequence of the figures A, B, C and D (adjustment Generic: Sensor without medium). Switch on: Process variables In case of adjustment with medium, set- 1 Snsr 2,56 m up the sensor in the sequence A1, B1, Hart Communicator 2 AI % rnge C and D.
  • Page 41 Set-up 1.2.2 Generic: Sensor Choose analog output level Individual current values for 1.1.1 Generic: Sensor 1 4 mA test purposes (simulation of 2 20 mA measured values) 0,2 m 3 Other Confirm 4 End safety ABORT ENTER enquiry 1.2.3 Generic: Sensor Empty and full HELP EXIT...
  • Page 42 Set-up ® HART -menu plan (continuation) Empty adjustment with medium Generic: Sensor 1.2.3.1 Apply new 4 mA input Generic: Sensor 1.2.3 Set the: Generic: Sensor 1 4 mA Calibration Confirm 2 20 mA 1 Apply values safety 1.2.3.1 3 Exit 2 Enter values enquiry ABORT OK...
  • Page 43 Set-up 1.2.3.1.1.1 1.2.3.1.1 Generic: Sensor Generic: Sensor Current applied Set the: process value: 10.945 1 4 mA mbar 2 20 mA 1 Set as 4 mA value 3 EXIT 2 Read new value 3 Leave as found ABORT ENTER ABORT ENTER Generic: Sensor Generic: Sensor Current applied...

  • Page 44: Diagnosis 5.1 Simulation

    5.3 Repair Due to safety and guarantee reasons repair work beside the wiring must only be made by VEGA-staff. In case of a defect, please return the appropriate instrument with a short description of the error to our repair department.

  • Page 45: Failure Removal

    Diagnosis 5.4 Failure removal Failure Measure, failure removal Current value Check the sensor inputs on the following failures: ≥ 22 mA - shortcircuit on the input - sensor not correctly connected - sensor line interrupted - supply voltage too low or too high Measure the current on the connection line to the sensor.
  • Page 46 If the resistor is higher or if the connection is interrupted, the reason is mainly a bonding failure in the adapter plate or a defect resistor due to strong electrostatic discharge. In both cases the electrode must be repaired at VEGA. Capacitive electrodes EL 4 … 20 mA - compact...
  • Page 47 When you cannot find a failure in the electrode, than exchange the oscillator against a similar replacement type (if available) or send the electrode for repair to VEGA. After insertion of the new electronics, carry out an adjustment. See 4 Set-...
  • Page 48 Diagnosis Instrument failure VVO- failure message No failure detected on the sensor. Instrument failure Possible reasons are: - supply voltage outside the tolerance - defect oscillator - damage of the electrode or the isolation - electrode shortcircuited with the vessel wall •...
  • Page 49 Notes Capacitive electrodes EL 4 … 20 mA - compact...
  • Page 50 Notes Capacitive electrodes EL 4 … 20 mA - compact...
  • Page 51 Notes Capacitive electrodes EL 4 … 20 mA - compact...
  • Page 52 A TECHNOLOGY FOR EVERY LEVEL APPLICATION HiTECH Technologies, Inc. 301 Oxford Valley Road - Building 505 Yardley, PA 19067-7706 Tel: 215. 321. 6012; Fax: 215. 321. 6067 Tech Support (Toll Free) 866-DrLevel or 888-NIVELCO Email: info@DrLevel.com or info@hitechtech.com Web Site: www.DrLevel.com or www.hitechtech.com...

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