Operating Instructions - VEGACAP 27 -
Contents
1. 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 Due to safety and warranty reasons any invasive work on the device beyond that described in the operating instructions manual may be carried out only by personnel authorised by the manufacturer Arbitrary conversions or modifications are explicitly forbidden 2 3 Warning about misuse Inappropriate or incorrect use of the instrument can give rise to application specific hazards e g vessel overfill or damage to system components through incorrect mounting or adjustment 2 4 General safety instructions This is a high tech instrument requiring the strict observance of standard regulations and guidelines The user must take note of the safety instructions in this operating instructions manual the country specific installation standards as well as all prevailing safety regulations and accident prevention rules The instrument must only be operated in a technically flawless and reliable condition The operator is responsible for trouble free operation of the instrument VEGACAP 27 double relay DPDT 5 For your safety VEIEA During the entire duration of use the user is obliged to determine the compliance of the required occupational safety measures with the current valid rules and regulations and also take note of new r2. 9 Insert the new oscillator 10 Screw in and tighten the two screws with a Phillips screwdriver 11 Lead the connection cable through the cable gland 12 Insert the wire ends into the open terminals according to the wiring plan and tighten them 13 Check the hold of the wires in the terminals by lightly pulling on them 14 Turn the cable gland right back and check the tightness The seal ring must completely encircle the cable 15 Carry out a fresh adjustment See chapter Set up new adjustment 16 Retighten the housing cover NO O1 BR 0 24 VEGACAP 27 double relay DPDT 608070 N3 8S7 33758 EN 070809 Maintenance and fault rectification The electronics exchange is now finished 7 4 Instrument repair If a repair is necessary please proceed as follows You can download a return form 23 KB from the Internet on our homepage www vega com under Downloads Forms and certificates Repair form By doing this you help us carry out the repair quickly and without having to call back for needed information Print and fill out one form per instrument Clean the instrument and pack it damage proof Attach the completed form and if need be also a safety data sheet outside on the packaging Please ask the agency serving you for the address of your return shipment You can find the respective agency on our website www vega com under Company VEGA world wide VEGACAP 27
3. Tel 44 0 191 490 1547 THORNE amp Fax 44 0 191 477 5371 D E R R l C K U K M cir co uk www thorneanderrick co ul Operating Instructions VEGACAP 27 double relay DPDT j Capacitive Contents VEA Contents 1 About this document LT JFUNCHOR si sop dees nde mare M get 5 12 Target group 5 1 3 Symbolism used 5 2 For your safety 2 1 Authorised personnel 6 2 2 Appropriate USe 6 2 3 Warning about misuse 6 2 4 General safety instructions 6 2 5 Safety approval markings and safety tips 7 2 6 CE conformity 7 2 7 Safety instructions for Ex areas 7 2 8 Environmental instructions 7 3 Product description 8 1 Configuration 8 3 2 Principle of operation 9 3 3 Operation hands wl ake A 10 3 4 Storage and transport 11 4 Mounting 4 1 General instructions 12 4 2 Mounting instructions 13 5 Connecting to power supply 5 1 Preparing the connection 15 5 2 Wiring plan single chamber housing 15 6 Setup 6 1 Generali Miss ace edhe le Mat add 28 17 6 2 Adjustment elements 17 6 3 Functional chart 20 7 Maintenance and fault re
4. if necessary further documents VEGACAP 27 consists of the following components e Housing cover e Housing with electronics e Process fitting with electrode pa Fig 1 VEGACAP 27 with plastic housing Housing cover Housing with electronics Process fitting active screen segment active probe The type label contains the most important data for identi fication and use of the instrument O GO ND e Article number e Serial number e Technical data e Article numbers documentation VEGACAP 27 double relay DPDT 7 Product description VEIEA Area of application Functional principle With the serial number it is possible to show the delivery data of the instrument via www vega com VEGA Tools and serial number search In addition to the type label outside on the instrument the serial number is also available inside the instrument 3 2 Principle of operation VEGACAP 27 is a level switch with fully insulated capacitive electrode with screen segment and active tip for level detection VEGACAP 27 is very rugged and maintenance free and can be used in all areas of industrial process technology Typical applications are overfill and dry run protection Setup of the instrument is very easy because an adjustment is not necessary This means that changing products with different dielectric values such as e g water and oil or conductive
5. and non conductive products do not influence the settings on the instrument and their switching accuracy Fully insulated probes with screen segment like VEGACAP 27 are preferably used in conductive very adhesive liquids Due to the mechanical construction with screen segment and the active tip buildup on the probe is compensated The capacitive measuring principle places no special require ments on installation Hence many different applications can be equipped with VEGACAP 27 The instrument can also be used problem free in corrosive products Probe measured product and vessel wall form an electrical capacitor The capacitance is influenced by three main factors VEGACAP 27 double relay DPDT 608070 N3 8S7 33758 EN 070809 Product description Supply Fig 2 Functional principle Plate capacitor 1 Distance between the electrode surfaces 2 Size of the electrode surfaces S Type of dielectric between the electrodes The probe and the vessel wall are the capacitor plates The measured product is the dielectric Due to the higher dielectric constant DK value of the product compared to air the capacitance increases as the probe is gradually covered The capacitance change is converted by the oscillator into a switching command VEGACAP 27 is a compact instrument i e it can be operated without external evaluation system The integrated electronics evaluates the level signal and
6. as well as trade and company names are property of their lawful proprietor originator VEGACAP 27 double relay DPDT 33 Supplement 34 VEGACAP 27 double relay DPDT 608070 N3 8S7 33758 EN 070809 Supplement VEGACAP 27 double relay DPDT 35 VEBA Tel 44 0 191 490 1547 THORNE amp Fax 44 0 191 477 5371 D E R R C K U K Email northernsales thorneandderrick co uk Website www heattracing co uk www thorneanderrick co uk CE 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 2007 Subject to change without prior notice 33758 EN 070809
7. outputs a switching signal With this switching signal a connected device can be operated directly e g a warning system a PLC a pump etc You can find data on voltage supply in chapter Technical data in the Supplement 3 3 Operation The probe can be adapted to the dielectric value of the product directly on the electronics module A switching command can be triggered when the probe is covered or laid bare On the electronics module you will find the following indicating and adjustment elements e Control lamp for indication of the switching condition e Potentiometer for switching point adaptation covered e DIL switch for mode adjustment VEGACAP 27 double relay DPDT 9 Product description VEIEA Packaging Transport Transport inspection Storage Storage and transport tem perature 3 4 Storage and transport Your instrument was protected by packaging during transport 116 capacity to handle normal loads during transport is assured by a test according to DIN EN 24180 The packaging of standard instruments consists of environ ment friendly recyclable cardboard For special versions PE foam or PE foil is also used Dispose of the packaging material via specialised recycling companies Transport must be carried out under consideration of the notes on the transport packaging Nonobservance of these instruc tions can cause damage to the device The delivery must be checked for compl
8. value gt 2 DK value gt 1 5 2 turns 1 turn Tab 1 Number of additional turns for the potentiometer 6 Note With the measurement of products with very low dielectric values the number of turns can be reduced up to 1 according to the chart 18 VEGACAP 27 double relay DPDT 608070 N3 8S7 33758 EN 070809 Set up me This setting is too sensitive with conductive adhesive products Note When placing the housing cover make sure that the inspection glass is above the signal lamp of the oscillator 6 3 Functional chart The following chart provides an overview of the switching conditions depending on the adjusted mode and level Level Switching sta Control lamp tus Mode A Overfill protection ely 3 4 5 pou 6 7 8 Relay energized Mode A Overfill protection ety 3 4 5 XX 6 7 8 Relay deener gized Mode B Dry run protection Em Vi 3 4 5 X 6 7 8 Relay energized Mode B Dry run protection SI 3 4 5 Oz 6 7 8 Relay deener gized Failure of the any supply voltage mode A B 3 4 5 O 6 7 8 Relay deener gized VEGACAP 27 double relay DPDT 19 etu VEFA Level Switching sta Control lamp tus Failure any 3 4 1 O 6 7 8 Relay deener gized 20 VEGACAP 27 double relay DPDT 608070 N3 8S7 33758 EN 070809 Maintenance and fault recti
9. AC 54 W DC 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 min 500 V DC AgNi or AgSnO and Au plated A overfill protection B dry run protection approx 0 7 s approx 0 7 s approx 1 5 Ambient conditions Ambient temperature on the housing Storage and transport temperature Process conditions 40 80 C 40 176 F 40 80 C 40 176 F Process pressure Process temperature 1 63 bar 100 6300 kPa 14 5 914 psig See following diagram See following diagram 28 VEGACAP 27 double relay DPDT 608070 N3 8S7 33758 EN 070809 Supplement 63 bar 914psi 25 par a ae oe etn C ctr eS 363psi 2 0 C 32 F A 10 C 14 F 212 F amp 392 F Fig 22 Process pressure Process temperature VEGACAP 27 with process fitting of 316L 1 Process pressure 2 Process temperature 3 Temperature range with temperature adapter 63 bar 914psi 25 b r peso 44 see oe HO Heec eae emet 363psi 50 C 0 C 100 C 200 C 58 F 32 F 212 F amp 392 F Fig 23 Process pressure Process temperature VEGACAP 27 with process fitting of 316Ti 1 Process pressure 2 Process temperature 3 Temperature range with tempe
10. L Fig 24 VEGACAP 27 threaded version G172 A L Sensor length see chapter Technical data LA active tip see chapter Technical data 31 VEGACAP 27 double relay DPDT Supplement pen SW 60 200 0007 7 7 8 3 35 64 90 0007 Fig 25 Temperature adapter optional 316L 97677 32 VEGACAP 27 double relay DPDT 608070 N3 8S7 33758 EN 070809 Veer Supplement 9 3 Industrial property rights 9 4 Trademark VEGA product lines are global protected by industrial property rights Further information see http www vega com Only in U S A Further information see patent label at the sensor housing VEGA Produktfamilien sind weltweit gesch tzt durch gewerbliche Schutzrechte N here Informationen unter http www vega com Les lignes de produits VEGA sont globalement prot g es par des droits de propri t intellectuelle Pour plus d informations on pourra se r f rer au site http www vega com VEGA lineas de productos est n protegidas por los derechos en el campo de la propiedad industrial Para mayor informaci n revise la pagina web http www vega com MuHuu npogykuuu cbupmb BETA 3auuljarorcsi no BceMy mupy npaBamu Ha MHTENNEKTYANbHYIO COOCTBEHHOCTb Haneneinuyro uncbopmayuto cvorpure Ha 08416 http www vega com VEGAR BI B te S SR EE ARE LARP 3t 413 BB A ALIA http www vega com All brands used
11. Process fitting Tri Clamp Process fitting bolting DN50 Process seal insulation fully insulated Probe rod PFTE fully insulated 16 mm 0 63 in Probe rod PFA fully insulated 16 mm 0 63 in Materials non wetted parts Housing Seal between housing and housing cover Temperature adapter optional Ground terminal Weights With plastic housing with Aluminium housing Rod weight 20 mm 0 79 in Sensor length L Active tip LA Max lateral load Max torque process fitting thread Frequency 316L 316Ti or Aluminium 316Ti 316Ti Klingersil C 4400 PTFE or PFA 316L or 316Ti 316L or 316Ti Plastic PBT Polyester Alu die casting pow der coated Silicone Aluminium plastic housing 316Ti 316L approx 1200 g 42 oz approx 1600 g 56 oz 1100 g m 12 0200 250 4000 mm 9 8 157 in 50 150 mm 2 5 9 in 10 Nm 7 4 Ibf ft 100 Nm 74 Ibf ft 430 kHz Output variable Output Turn on voltage min max Relay output DPDT 2 floating spdts 10 mV 253 V AC 253 V DC VEGACAP 27 double relay DPDT 27 Supplement Switching current min max Breaking capacity min max Potential separation Contact material relay contacts Modes adjustable Switching delay when immersed when laid bare in case of failure 10 HA 3 AC 1ADC 50 mW 750 VA
12. ctification 7 4 Maintenance 22 7 2 Remove interferences 22 7 3 Exchange of the electronics module 25 7 4 Instrument repair 26 8 Dismounting 8 1 Dismounting steps 27 82 Di posal rre ana nat RR A 27 2 VEGACAP 27 double relay DPDT 608070 N3 8S7 33758 EN 070809 Contents 9 Supplement 9 1 Technical data 28 9 2 Dimensions 32 9 3 Industrial property rights 34 9 4 Trademark 51252224 ue gros house 34 Supplementary documentation me Information Supplementary documents appropriate to the ordered version come with the delivery You can find them listed in chapter Product description Instructions manuals for accessories and replacement parts me Tip To ensure reliable setup and operation of your VEGACAP 27 we offer accessories and replacement parts The associated documents are Operating instructions manual Oscillator CAP E31R VEGACAP 27 double relay DPDT About this document 1 About this document 1 1 Function This operating instructions manual provides all the information you need for mounting connection and setup as well as important instructions for maintenance and fault rectification Please read this information before putting the instrument into operation and keep this manual accessible in th
13. double relay DPDT 25 Dismounting 8 Dismounting 8 1 Dismounting steps Warning Before dismounting be aware of dangerous process con ditions such as e g pressure in the vessel high temperatures corrosive or toxic products etc Take note of chapters Mounting and Connecting to power supply and carry out the listed steps in reverse order 8 2 Disposal The instrument consists of materials which can be recycled by specialised recycling companies We use recyclable materials and have designed the electronics to be easily separable WEEE directive 2002 96 EG This instrument is not subject to the WEEE directive 2002 96 EG and the respective national laws in Germany e g ElektroG Pass the instrument directly on to a specialised recycling company and do not use the municipal collecting points These may be used only for privately used products according to the WEEE directive Correct disposal avoids negative effects to persons and environment and ensures recycling of useful raw materials Materials see chapter Technical data If you cannot dispose of the instrument properly please contact us about disposal methods or return 26 VEGACAP 27 double relay DPDT 608070 N3 8S7 33758 EN 070809 VE Supplement 9 Supplement 9 1 Technical data General data Material 316L corresponds to 1 4404 or 1 4435 Materials wetted parts Process fitting thread
14. e immediate vicinity of the device 1 2 Target group This operating instructions manual is directed to trained personnel The contents of this manual should be made available to these personnel and put into practice by them 1 3 Symbolism used Information tip note This symbol indicates helpful additional information Caution If this warning is ignored faults or malfunc tions can result Warning If this warning is ignored injury to persons and or serious damage to the instrument can result Danger If this warning is ignored serious injury to persons and or destruction of the instrument can result Ex applications This symbol indicates special instructions for Ex applications List The dot set in front indicates a list with no implied sequence Action This arrow indicates a single action Sequence Numbers set in front indicate successive steps in a procedure VEGACAP 27 double relay DPDT 608070 N3 8S7 33758 EN 070809 For your safety 2 For your safety 2 1 Authorised personnel All operations described in this operating instructions manual must be carried out only by trained specialist personnel authorised by the operator During work on and with the device the required personal protection equipment must always be worn 2 2 Appropriate use VEGACAP 27 is a sensor for level detection You can find detailed information on the application range in chapter Product description
15. egulations 2 5 Safety approval markings and safety tips The safety approval markings and safety tips on the device must be observed 2 6 CE conformity VEGACAP 27 is in CE conformity with EMC 89 336 EWG and LVD 73 23 EWG Conformity has been judged according to the following standards e EMC Emission EN 50081 1 1992 Suceptibility EN 50082 2 1995 e LVD EN 61010 1 1993 2 7 Safety instructions for Ex areas Please note the Ex specific safety information for installation and operation in Ex areas These safety instructions are part of the operating instructions manual and come with the Ex approved instruments 2 8 Environmental instructions Protection of the environment is one of our most important duties That is why we have introduced an environment management system with the goal of continuously improving company environmental protection The environment man agement system is certified according to DIN EN ISO 14001 Please help us fulfil this obligation by observing the environ mental instructions in this manual e Chapter Packaging transport and storage e Chapter Disposal VEGACAP 27 double relay DPDT 608070 N3 8S7 33758 EN 070809 Product description Scope of delivery Components Type label 3 Product description 3 1 Configuration The scope of delivery encompasses e VEGACAP 27 level sensor e Documentation this operating instructions manual
16. eptions e g in pipelines or if the probe is mounted very close to the vessel wall it can happen ath the probe signals already overfilling covering in uncovered condition In this case the switching point must be re adjusted For adjustment the vessel must not be filled and the switching point adjustment is also possible in dismounted condition A fresh adjustment is necessary in the following cases e for probes with a length of more than 3 m 9 8 ft e in narrow space installation conditions with high standing capacitance e g in tubes etc e after exchange of the oscillator Proceed as follows for a fresh adjustment Make sure that the probe is uncovered 2 Pierce the cover of the potentiometer 6 with a screw driver 3 Turn the below potentiometer 6 first of all anticlockwise max 20 turns until the control lamp signals covered Mode A overfill protection control lamp lights Mode B dry run protection control lamp extinguishes If this condition is already reached you can continue with the next step 4 Turnthe potentiometer 6 very slowly due to the damping clockwise until the control lamp signals uncovered Mode A overfill protection control lamp extinguishes Mode B dry run protection control lamp lights 5 Turn the potentiometer 6 clockwise according to the following chart 6 The probe is now ready for operation Sensitivity Standard very sensitive additional turns DK
17. ere is a ground terminal between the cable entries This connection serves to drain off electrostatic charges You can find data on voltage supply in chapter Technical data in the Supplement VEGACAP 27 is connected with standard cable with round cross section An outer cable diameter of 5 9 mm 0 2 0 35 in ensures the seal effect of the cable gland If cable with a different diameter or wire cross section is used exchange the seal or use an appropriate cable connection Note When placing the housing cover make sure that the inspection glass is above the signal lamp of the oscillator 5 2 Wiring plan single chamber housing We recommend connecting VEGACAP 27 in such a way that the switching circuit is open when there is a level signal line break or failure safe condition The relays are always shown in non operative condition The two relays DPDT work synchronously Hence it is possible to control also e g a horn and a magnet valve 14 VEGACAP 27 double relay DPDT 608070 N3 8S7 33758 EN 070809 Velm Connecting to power supply Fig 5 Wiring plan 7 Relay output 2 Relay output S Voltage supply VEGACAP 27 double relay DPDT 15 Set up Function Configuration 6 Set up 6 1 General The numbers in brackets refer to the following illustrations On the electronics module you wi
18. eteness and possible transit damage immediately at receipt Ascertained transit damage or concealed defects must be appropriately dealt with Up to the time of installation the packages must be left closed and stored according to the orientation and storage markings on the outside Unless otherwise indicated the packages must be stored only under the following conditions Not in the open Dry and dust free Not exposed to corrosive media Protected against solar radiation Avoiding mechanical shock and vibration Storage and transport temperature see Supplement Technical data Ambient conditions e Relative humidity 20 85 10 VEGACAP 27 double relay DPDT 608070 N3 8S7 33758 EN 070809 Mounting Switching point Welding work Handling Moisture Transport 4 Mounting 4 1 General instructions In general the level switch can be mounted in any position The instrument must be mounted in such a way that the probe is at the height of the requested switching point Before beginning with the welding work remove the oscillator out of the sensor By doing this you avoid damages ont he electrode due to inductive couplings With threaded versions the housing must not be used to screw the instrument in Applying tightening force on the housing can damage its rotational mechanical parts Use the hexagon for screwing in Use the recommended cables see chapter Connecting to power sup
19. fication Reaction in case of failures Causes of malfunction Fault rectification 24 hour service hotline Checking the switching signal 7 Maintenance and fault rectification 7 1 Maintenance When used as directed in normal operation VEGACAP 27 is completely maintenance free 7 2 Remove interferences The operator of the system is responsible for taken suitable measures to remove interferences VEGACAP 27 offers maximum reliability Nevertheless faults can occur during operation These may be caused by the following e g Sensor Process Supply Signal processing The first measure to be taken is to check the output signal In many cases the causes can be determined this way and the faults rectified However if these measures are not successful call the VEGA service hotline in urgent cases under the phone no 49 1805 858550 The hotline is available to you 7 days a week round the clock Since we offer this service world wide the support is only available in the English language The service is free of charge only the standard telephone costs will be charged VEGACAP 27 signals covered when the vibrating element is not submerged overfill protection 2 VEGACAP 27 signals uncovered when the vibrating element is submerged dry run protection e Wrong mode selected gt Set the correct mode on the mode switch A overfill protection B dry run protection Wiring should be carried out accord
20. ge the switching condition of the relay You can set the required mode A max detection or overfill protection B min detection or dry run protection We recommend connecting according to the quiescent current principle relay contact deenergizes when the switching point is reached because the relay always takes on the same safe condition if a failure is detected or in case of mains failure Control lamp for indication of the switching condition e Control lamp on Relay deenergised The measuring system is immediately ready for operation The switching point must no longer be set with VEGACAP 27 The probe has an active tip and a screen segment Thanks to the screen segment the so called standing capacitance caused by the vessel after installation of the probe is mainly compensated As a default setting the oscillator is adjusted to the basic capacitance of the probe The relay output switching when the active tip is covered active tip 50 150 mm 2 5 9 in of the electrode Changing dielectric values of the products such as e g caused in mixing vessels are no problem for the switching accuracy within the active pin The selection of the electrode length is hence very important because the length of the electrode determines the switching point This switching point cannot be shifted on the electrode VEGACAP 27 double relay DPDT 17 Set up VEEA Exceptions Fresh adjustment In exc
21. higher values there is a contacting error in the adapter plate or the resistor is defective No fault if you cannot find a fault in the probe then exchange the oscillator by a similar replacement electronics if available VEGACAP 27 double relay DPDT 23 Maintenance and fault rectification VISIE A Reaction after fault rectifica tion If the fault is eliminated after inserting the new oscillator then you have to carry out a fresh adjustment with the new oscillator because oscillators have certain manufacturing tolerances If the fault still exists or if no replacement oscillator is available then you have to return the probe for repair Depending on the failure reason and measures taken the steps described in chapter Set up must be carried out again if necessary 7 3 Exchange of the electronics module If itis necessary to exchange the oscillator you should use an oscillator type CAP E31R Proceed as follows 1 Switch off power supply 2 Loosen the four screws of the housing cover with a Phillips screwdriver Remove the housing cover Loosen the screws of the terminals with a Allen wrench Pull the connection cables out of the terminals Loosen the two screws with a Phillips screwdriver Open the tensile ring on the old oscillator and pull out the old oscillator 8 Compare the new oscillator with the old one The type label of the oscillator must correspond to that of the old oscillator
22. ing to the quiescent current principle Supply voltage too low gt Check the power supply VEGACAP 27 double relay DPDT 21 Maintenance and fault rectification VEIEA Electronics defective gt Press the mode switch A B If the instrument then changes the mode the instrument may be mechan ically damaged Should the switching function in the correct mode still be faulty return the probe for repair gt Push the mode switch If the probe then does not change the mode the oscillator may be defective Exchange the oscillator e Shortcircuit in the probe e g because of moisture in the housing gt Remove the oscillator and check the resistance between the marked plug connections according to the following illustration a I V 1MW J Fig 21 Check the resistance in the probe 1 Middle pin 2 Variable capacitor phase 3 Capacitor Measure the resistance values between the following contacts with an ohmmeter range MOhm 22 VEGACAP 27 double relay DPDT 608070 N3 8S7 33758 EN 070809 Maintenance and fault rectification Contact 4 against middle pin 1 The resistor must be 1 MOhm If the resistor is lower this means moisture in the housing or a fau
23. ll find the following indicating and adjustment elements e Potentiometer for switching point adaptation e DIL switch for mode adjustment A B e Control lamp Note As a rule always set the mode with the mode switch 5 before starting setup VEGACAP 27 The switching output will change if you set the mode switch 5 afterwards This could possibly trigger other connected instruments or devices 6 2 Adjustment elements Fig 6 Oscillator with relay output 1 Type label 2 Connection terminals 3 Tensile proving ring 4 Control lamp 5 DIL switch for mode adjustment 6 Potentiometer for switching point adaptation 16 VEGACAP 27 double relay DPDT 608070 N3 8S7 33758 EN 070809 Set up me Switching point adaptation 6 Mode adjustment 5 Signal lamp 4 Switching point adjustment The switching status of the electronics can be checked with closed housing only plastic housing see Function chart Note When placing the housing cover make sure that the inspection glass is above the signal lamp LED of the oscillator To adjust VEGACAP 27 loosen first of all the four screws on the upper side of the instrument with a screwdriver and remove the housing cover You can adapt the switching point to the solid with the potentiometer The electronics is adjustment free and an adaption is only necessry in exceptions See Exceptions With the mode switch you can chan
24. lt in the electrode insulation A possible reason could be also a non insulated electrode which is used in a conductive humid medium If the resistor is higher or if the connection is interrupted the reason is mostly a contact error in the adapter plate or a defective resistor due to strong electrostatic arking In both cases the probe must be repaired in our premises Contact 4 against vessel The electrical connection between contact 4 and metal vessel not the mounting boss or probe flange should good Measure the resistance value between contact 4 and vessel with an ohmmeter range very small e Shortcircuit 0 3 Ohm optimum connection e Resistor gt 3 Ohm bad connection If the resistance value is gt 3 Ohm this can be due to corrosion on the thread or flange or the thread was covered e g with teflon tape Check the connection to the vessel If there is no connection you can connect a cable from the outer ground terminal to the vessel Keep in mind that coated flanges must always be connected via the ground terminal to the vessel Contact 7 against middle pin 1 The resistor must be infinite gt 10 MOhm If the resistor is lower then moisture can be penetrated or the compensation capacitor or variable capacitor phase is defective Contact 3 against 4 The resistor must be 1 MOhm In case of lower values the electrode insulation is defective or moisture is penetrated into the housing In case of
25. luidisation can cause the probe of VEGACAP 27 to vibrate in resonance If a longer rod version is necessary you can secure the probe by fastening a suitable brace or guy directly above the end of the rod If VEGACAP 27 is mounted in the filling stream unwanted erroneous measurements may result Mount VEGACAP 27 at a location in the vessel where no disturbing influence from e g filling openings agitators etc can occur This applies particularly to instrument versions with a longer probe 12 VEGACAP 27 double relay DPDT 608070 N3 8S7 33758 EN 070809 Velm Mounting Fig 4 Inflowing medium VEGACAP 27 double relay DPDT 13 Connecting to power supply VEEA Note safety instructions Select power supply Selecting connection cable Wiring plan 5 Connecting to power supply 5 1 Preparing the connection Always keep in mind the following safety instructions e Connect only in the complete absence of line voltage Connect the power supply according to the following diagrams Oscillator CAP E31R is designed in protection class 1 To maintain this protection class it is absolutely necessary that the ground conductor be connected to the internal ground terminal Take note of the general installation regulations As a rule connect VEGACAP 27 to vessel ground PA or in case of plastic vessels to the next ground potential On the side of the housing th
26. ply and tighten the cable gland You can give your VEGACAP 27 additional protection against moisture penetration by leading the connection cable down ward in front of the cable entry Rain and condensation water can thus drain off This applies mainly to outdoor mounting areas where high humidity is expected e g from cleaning processes or cooled or heated vessels oc Fig 3 Measures against moisture penetration Do not hold VEGACAP 27 on the probe Especially with heavy flange versions or long rod versions the sensor can be damaged simply by the weight of the instrument VEGACAP 27 double relay DPDT 11 Mounting VEIEA Pressure Vacuum Agitators and fluidization Inflowing medium The process fitting must be sealed if there is gauge or low pressure in the vessel Before use check if the seal material is resistant against the measured product and the process temperature The max permissible pressure is stated in chapter Technical data in the Supplement or on the type label of the sensor 4 2 Mounting instructions Agitators equipment vibration etc can cause the level switch to be subjected to strong lateral forces For this reason do not use an overly long probe for VEGACAP 27 but check if you can mount a short level switch on the side of the vessel in horizontal position Extreme vibration caused by the system e g due to agitators or turbulence in the vessel from f
27. rature adapter Dielectric figure 21 5 VEGACAP 27 double relay DPDT 29 Supplement VEIEA Electromechanical data Cable entry plug dependent on the version Single chamber housing Screw terminals Adjustment elements e 1xcable entry M20x1 5 cable 5 9 mm 1x blind stopper M20x1 5 attached 1x cable entry M20x1 5 or e 1x cable entry NPT 1x blind stopper Ve NPT 1x cable entry 2 NPT or e 1x plug M12x1 1x blind stopper M20x1 5 for wire cross section up to 1 5 mm 0 0023 in Mode switch A B Potentiometer Min detection or dry run protection Max detection or overfill protection Switching point adaptation Voltage supply Supply voltage Power consumption Electrical protective measures 20 253 V AC 50 60 Hz 20 72 V DC at U gt 60 V DC the ambient temperature can be max 50 C 122 F 1 9 VA AC approx 1 5 W DC Protection Overvoltage category Protection class Approvals IP 66 IP 67 Hl l Overfill protection according to WHG 30 VEGACAP 27 double relay DPDT 608070 N3 8S7 33758 EN 070809 Wz y Supplement 9 2 Dimensions 085 mm 3 11 52 76 mm 2 63 64 EN pn 4 J g 8 e y E S 2 SW 60 2 23 64 ol ate ele TVPNPT ES ol al NZ 2 20 mm m 25 32 3 L
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