METAL SEPARATOR Mesep Extractor Manual (English)

Transcription

1 METAL SEPARATOR Mesep Extractor Manual (English) Mesep Extractor, Version

2 Table of Contents 1. General Instructions on using the manual 3 2. Area of Utilisation and Qualifications Intended use Improper use Owner/operator s duty of care 5 3. General Safety Information Explanation concerning utilised safety symbols Fundamental safety measures 6 4. Instructions references for the metal separator Assembly instructions Operating instructions Metal separator s interference protection 9 5. Technical Data Technical Description Ring detector and evaluation electronics Cyclone and separating unit Sensitivity of the ring detector Product Effects bothersome product properties Transportation Safety Information for transit and assembly Assembly Instructions Assembly Electric connections Commissioning Maintenance General maintenance Cleaning Anti-wear plate (optional) Regular inspections Faults and Causes of Errors Spare Parts Annex 28 2

3 1. General 1.1. Instructions on using the manual This manual is valid for the Mesep Extractor Manufacturer: Pulsotronic-Anlagentechnik GmbH Neue Schichtstr Niederdorf Tel.: (+49) / Fax: (+49) / Issue date of documentation: August 2007, Version 0701 This manual contains all the information that is of relevance for the operation. Before commencing with work for the first time using the metal detector, this User Manual should be read and understood by all the persons who are authorized to work on and with the metal separator. Special stress should be placed on the Safety Information. The User Manual is a component of the metal separator and must always be available for the reference of the authorized circle of people. Chapters of this manual should never be removed from the manual at any time. Replace a missing manual or missing pages, especially the Safety Information chapter immediately if lost. Note: Pulsotronic does not grant an implied guarantee for the customary quality and suitability for a specific utilisation purpose. This documentation contains copyright protected information. It may not be copied, reproduced, translated or collected on data carriers, in whole or in part, without obtaining prior permission of Pulsotronic. This documentation is not subject to the updating services of Pulsotronic. Modifications in this documentation as well as all rights are reserved. 3

4 2. Area of Utilisation and Qualifications 2.1. Intended use The Mesep Extractor is integrated in the vacuum feed line just in front of the material intake. Please ensure that the metal separator is not permitted to warm up more than 50 C. The Mesep Extractor eliminates the detected metal particles at various or varying flow speeds, without having to be adjusted for this purpose. Note: The Mesep Extractor removes metal contaminants out of pourable, dry material column, which are drawn through the conveyor system and into the by means of vacuum, via a flap. The Messep Extractor was developed to protect plastic injection moulding machines, extruders or peripherals against metal contamination of all kinds. A small quantity of the good material is also discharged during the separating process, although the reliable removal of metal is in the foreground and a slight loss of material is technically unavoidable. It is necessary to observe a few marginal and usage conditions in order that the device will function reliably. This manual will deal with these points. Thus, reading this manual is absolutely mandatory to ensure a trouble-free operation. The maximum response sensitivity to metals is subject to technical and physical limits (see chapter on Technical Data). The Mesep Extractor is not suitable for removing metal from materials that fall freely or inside conveyor lines that are pressurized. The Mesep Extractor can be used to minimize damages due to metal contamination. Regular inspections of the devices is absolutely mandatory as components are involved, which could malfunction due to external influences or wear, in spite of the latest technology Improper use The Mesep Extractor metal separator is not intended for any other type of use than those indicated in 2. Area of Utilisation and Qualifications; anything else is considered an improper use! Please note that the following is forbidden: Removal or modification of the safety devices Using the metal separator for an unapproved use Converting the metal separator without Pulsotronic s permission in order to use it for another purpose. Bear in mind that you may be considered the manufacturer of the metal separator after such a conversion, along with all the consequences that are involved! 4

5 2.3. Owner/operator s duty of care The Mesep Extractor Metal Separator has been designed and constructed according to harmonized standards. Thus, it complies with the latest technology and ensures the highest possible degree of safety. This safety can only be achieved in operational practice if all the measures for this have been undertaken. Planning these measures and controlling their implementation belongs to the owner/operator s duty of care. The owner/operator must especially safeguard the following in particular: that the metal separator is only used for the intended purpose, (see 2.1, Intended Use ); that the metal separator is only operated when it is in a perfectly functioning condition and that the safety equipment in particular is examined at regular intervals to ensure it is functioning properly that the Operating Manual is available at all times and is in good legible condition that only adequately qualified and authorized staff may operate, service and repair the metal separator that the personnel must be trained on all matters of occupational safety and environmental protection before starting to work with it for the first time and must be familiar with the Operating Manual and especially the Safety references contained therein that none of the safety and warning information that has been attached to the machine is removed and that it remains legible 5

6 3. General Safety Information 3.1. Explanation concerning utilised safety symbols The following safety symbols are used in the Operating Manual concerned here. These symbols are mainly intended to draw the reader s attention to the text appearing beside the safety reference. Danger! This symbol indicates that there are dangers for life and limb. Danger! This symbol indicates that there are dangers for life and limb due to electrical voltage Fundamental safety measures 6 Do not reach into the openings on the metal separator. Mechanical forces are created after switching on the pneumatically operated points, which could cause injuries. Always disconnect the device from the compressed air and voltage supply before performing any maintenance work. Please ensure that no one can re-connect the compressed air or voltage supply before the work is completed. Never put the metal separator into operation without the safety equipment required on the factory side. These include the safety grates over the moving parts in particular. Immediately discontinue the operation if the safety equipment is not functioning properly or is damaged. If technical malfunctions occur during operation due to wear or fatigue, rectify these immediately. Set out a sufficient number of regular maintenance intervals. Always observe the safety information which is located on the unit itself. It can help to avoid dangers. Do not remove this information under any circumstances. Do not put the metal separator into operation if you: have not been briefed completely by the owner/operator, or have not read this Operating Manual in full, or

7 have not completely understood this Operating Manual. Operating errors can result in serious personal or property damages. Danger! Avoid touching the electronic circuit board. Disconnect the unit from the supply voltage and the compressed air supply before connecting the electronics to other peripherals. You will avoid unintended electrical short circuits as a result of this. It is necessary to ensure that static charges dissipate before any possible work commences. 7

8 4. Instructions references for the metal separator Trouble-free and safe operation of the Mesep Extractor Metal Separator is only possible, if the following points are observed Assembly instructions Fastening must be performed in such a way that none of the screws or other fastening materials can become loose unintentionally. The device may not be dismantled for assembly. The assembly must be carried out as a complete unit. No welding current may be allowed to flow through the housing on the metal separator under any circumstances! This would permanently destroy the metal separator! IMPORTANT INFORMATION The devices are not 100% airtight due to production-related reasons. Therefore, a very slight loss of air can be expected (approx. 17mbar at 16m/sec. air velocity). Thus, the suction-type conveyor system should have sufficient capacity reserves to compensate for this loss, so that the conveying of material is not affected and sufficient material can be conveyed to the machines. The losing of compressed air cannot be heard acoustically (no hissing noises). The escaping air involved is minimal. All the devices are checked to ensure they are sufficiently leakproof before leaving the factory. An impairment in the system has occurred in some cases if several devices were assembled simultaneously. Thus, it is necessary to clarify this prior to the installation of more than five devices at one time, to prevent any difficulties. Connection Instructions Ensure the mains voltage is the proper one. Installation and connections may only be performed by trained staff. Observe the installation requirements for erecting and operating electrical plant (VDE 0100). Never carry out any work when the metal separator is switched on! Carry out all protective measures for persons and machinery in accordance with the circumstances and regulations. Take the capacities of the output contacts into consideration. The metal separator must be well grounded (avoid star-shaped earth circuits, shortest link to main earth) Operating instructions The metal separator should remain switched on at all times. That way, the electronic circuits have the longest service life. 8

9 4.3. Metal separator s interference protection The metal separator s power input is protected against parasitic induction by the factory. Even higher operational safety and additional protection against functional faults is achieved through the following measures: Use of line filters, if the mains voltage is affected by switching on other large consumers (compensation systems, welding devices, HF furnaces, electromagnetic valves, etc.) Protective circuitry for inductive loads (solenoids, gates, electromagnets) as a result of RC elements. High voltage peaks can result from shutting off inductive loads. These high voltage impulses are short-circuited by the RC elements. 9

10 5. Technical Data Item designation Mesep Extractor 38, 45, 50 (with 50 mm ring) Mesep Extractor 55, 60, 65, 70 (with 70 mm ring) Operating voltage Power consumption 230 V / 50 Hz or 115 V / 60 Hz < 40 Watt Admissible operating temperature 0 C - 50 C Admissible product temperature Max. 60 C (with compressed air cooling max. 100 C) Weight Adjustable sensitivity (Max.) About 32 kg Mesep Extractor Fe in centre of ring FE- St37 Mesep Extractor FE-St Fe in centre of ring Material throughput Type-dependent l/h, depending on complete conveyor system and conveyed material Sensitivity setting Operating pressure Parts touching media Relay contacts Using potentiometer 4-6 bar filtered, free of water and oil Paper-based laminate and stainless steel Metal detection (floating changeover contact 250V/5A) Paintwork - housing RAL 5005 Measurements 450 mm * 450 mm * 300 mm 10

11 6. Technical Description This chapter provides information on the configuration and way in which your metal separator operates. The Mesep Extractor Metal Separator consists of three main functional units: o Ring detector / Chapter 6.1. o Evaluation electronics / Chapter 6.1. o Cyclone and separating unit / Chapter Ring detector and evaluation electronics The toroid s metal detector operates using an analog evaluation principal, which is briefly explained below. A high frequency electromagnetic alternating field is produced in a ring sensor by means of an oscillator. If a metal piece or electrically conductible materials fall through the ring sensor, eddy currents are produced inside it. These remove the energy from the electromagnetic field. This energy loss causes dampening of the oscillator, which in turn reduces the signal amplitude. The size of the dampening is a measure for the size of the metal piece and has a direct relationship with the magnetic and electric properties of the metal particle: Large metal particles draw more energy from the field than small metal particles. Magnetic metals (e.g. steel) draw more energy from the field than non-magnetic metals (e.g. aluminium). This measuring principle is suitable for all types of metal and makes it possible to detect metal participles within product or in non-metallic packaging. The examined products are not affected or changed in any way by this kind of measuring. The threshold value, the size from which metal is detected, is set using a potentiometer. Once this value is exceeded, the device trips an electrical impulse. A flap is addressed with this impulse in metal separators by means of the evaluation electronics and the metal particle is then discharged into the flow of rejects Cyclone and separating unit The conveyor system sucks the material through the metal separator. There, it passes the metal sensor first, and then flows through a cyclone and subsequently leaves the device via a separating filter. If metal is detected, this separating filter opens, in order to discard the metal foreign matter. A slight quantity of the good material is also discharged in the process. Compressed air is blown into the cyclone through the ring at the same time; this removes 11

12 any such metal pieces that might have continued to remain behind the ring. This blowout effect also cleans the entire cyclone, the separating filter and the ring detector at the same time. The separating filter independently folds back into the original position and the conveying continues. The conveyed material enters the upper part of the cyclone tangentially. The flow speed forces the material into a spiral motion, which is directed in a downward direction. As a result of the combined effect with the blown in compressed air, the material spiral breaks down inside the cyclone and the drops out (approx one handful of material). And precisely this causes the independence of various flow speeds within the system. Automatic adapting to the material speed. The electronic metal detection within the sensor occurs with practically no time delay. On the other hand, there is a delay in the separating mechanism, which requires a certain time (even if it brief) to flip from position 1 to position 2. The result is that metal particles that are travelling quickly penetrate quite far into the cyclone after they are detected, before the separating filter has responded fully. A slow flow causes the exact opposite to occur. As everything is separated out of the cyclone, it makes no difference whether the material is right at the top of the cyclone or already inside the separating filter or somewhere in between; it will be separated regardless Sensitivity of the ring detector In the event that the ring detector reacts to the product effects (see Chapter Product Effects 6.4), it is necessary to reduce the sensitivity. The sensitivity is set on the ring detector using a potentiometer. The door on the housing is opened for this purpose. The ring detector is located at the top left. A potentiometer, which is secured by a retaining screw to prevent unintentional repositioning, is located there. Loosen the little slotted retaining screw. You can now change the sensitivity as follows: Turning to the left up to the potentiometer limit stop causes the sensitivity to be reduced. Turning to the right up to the potentiometer limit stop causes the sensitivity to be increased. Once you reach the limit stop, please do not try to use force to turn the potentiometer any further. The potentiometer will break off and will be permanently damaged, and the complete device will malfunction. 12

13 The potentiometer has a visible scale between 1 and 10. The set value should be recorded and controlled at regular intervals. That is the only way to determine whether or not someone has altered the setting. At delivery, the potentiometer is set to Level 8. NOTE: For detection accuracy, it is irrelevant, whether metal parts are covered by material or not. Non-magnetic metals affect the magnet field of the ring spool less intensely than magnetic ones. Thus, you should expect to use a reduced responsiveness for these metals. Sensitivity Iron Stainless steel Mesep Extractor 38, 45, 50 (with 50 mm ring) 0.6 mm 2.0 mm Mesep Extractor 55, 60, 65, 70 (with 70 mm ring) 1.0 mm 2.5 mm 6.4. Product Effects bothersome product properties This chapter explains: what is understood by the term product effect ; why the metal separator reacts to a product effect. This knowledge will help you to use the best possible setting for the metal separator in order to avoid any spurious releases. What is understood by the term product effect? The metal separator reacts to magnetism and electric conductivity. Because of this, electrically conductive substances, as is the case with metal, will affect the measuring field. This results in a test signal for the electronics, similar to what occurs when metal is reported. This is referred to as a negative influence on the magnetic field due to product effects. The result of the product effect is a metal report by the metal separator, although in reality, the product is metal-free. Please keep in mind, for example, how salt changes the conductivity of water. The electric resistance of distilled water is infinitely high, provided the water is pure distilled water. Distilled water does not contain any salts or minerals. Dissolved salt changes the electric resistance to such an extent that the solution is electrically conductive. Similarly, some plastics have conductive properties due to the admixing of materials. Raw materials are more or less electrically conductive. Components such as: Salt Sugar Minerals Moisture Carbons (plastic granulate died black) cause the materials to be more or less conductive. The magnetic field is continuous affected as a result. Although there are no metal particles in the examined material, the metal separator may still report metal. The results are unnecessary rejects. The product effect takes on a characteristic value for every material. The achievable sensitivity in practice is dependent on how well a potentially existing product effect can be compensated by the metal separator. The Mesep Extractor of this model has no product effect fade-out (compensation) possibilities. Frequently, however, reducing the sensitivity is all that is required to avoid 13

14 this bothersome effect. The achievable sensitivity however in metal detection systems with integrated product effect compensation is considerably higher. (Please ask our head office for product group M-Pulse or Digital+ Extractor). Suppressing product effects in the Mesep Extractor : A product effect can only be suppressed to a certain extent in the Mesep Extractor by reducing the responsiveness (see Chapter 6.3.). Note: The intensity of the product effect is proportional to the material throughput. As a result of this, reducing the material throughput with critical materials can also bring about a reduction in the bothersome effects. 14

15 7. Transportation 7.1. Safety Information for transit and assembly Danger! To avoid machine damages or life-threatening injuries during transit and the installation of the metal separator, please observe the following points absolutely: Transit and assembly work may only be carried out by qualified persons under observation of the safety instructions. Take the following weights into consideration when selecting suitable load-bearing equipment: Metal separator, depending on size and model, to 32 kg approx. Protruding, sharp edges can result in injuries due to cuts. Suspended loads can fall down resulting in mortal danger; never walk or stand underneath suspended loads! Parts that are loosely lying on top of each other can slip and fall down. Also read the chapter entitled "General Safety Information". 15

16 8. Assembly Instructions 8.1. Assembly The sturdy housing on the Mesep Extractor metal separator has four fastening brackets, which make wall assembly simple and fast. It is also conceivable that the unit could be used on a mobile rack. The setup location should be chosen in such a way that there is sufficient space for performing service work and so that it is possible to open the upper inspection flap and the housing door. The metal separator must be assembly horizontally to ensure it functions in a trouble-free manner. The other two axes must be arranged vertically. The unit will not operate in a horizontal position. In principle, the Mesep Extractor and the conveyor system must be switched off when the following system is connected. 1. Opening of the existing suction-type conveyor line 2. The material feed (incoming line) is connected to the left inlet socket on the Mesep Extractor by means of a plastic hose or metal tube. It is necessary to ensure this connection is leakproof, to avoid any loss of pressure. 16

17 Inlet socket 3. The material feed (incoming line) is connected to the left inlet socket on the Mesep Extractor by means of a plastic hose or metal tube. It is necessary to ensure this connection is leakproof, to avoid any loss of pressure. Discharge socket 17

18 4. The reject material chute on the Mesep Extractor situated on the bottom of the housing is connected to a collection container or a similar system by means of a hose or tube. 5. Mount the metal separator in such a way that it will suffer as little as possible shaking when in operation. Slight vibrations do not affect the separator. A metal alarm can be triggered though through a hard knock. 18

19 8.2. Electric connections 1 + Red 2 R Black 3 A White 4 - Blue 5 Solenoid valve 6 Flap Ring-Pulsor 7 Optional: solenoid valve Poti. A 8 Voltage and compressed air monitoring Poti. B S1 F L1 N Explanation of individual connections: 11/12: Optional compressed air monitoring (not standardly configured) An optional sensor can be connected here, which monitors the level of the compressed air. 16/17: Test key / Metal simulation Tests can also be triggered via an external floating contact, which is connected in parallel. 18/19: Output: 24 V DC/100 ma Permanent signal, for a signal lamp suitable as an equipment-on indicator 24/25/26: Only optionally equipped with changeover contact 250V/5A Break contact on 25 and 26 Make contact on 24 and 25 19

20 This is used for monitoring the voltage or the compressed air Changeover(N.O./N.C.) contacts 250 V/5 A 27/28: Closer contact 250V +/- 5A Shut when metal is ejected L1/N: Mains feed (230 VAC / 50 Hz or 115 VAC / 60 Hz) A: For setting the flap holding time in Eject metal position of 4 sec. Left limit stop sec. Right limit stop Exits 27/28 are also connected for the time the flap is open in Eject metal position. B: Setting the blow-off time of the cyclone with compressed air (preset at the factory) F1: Mains fuse: 230 VAC 0.25A time-lag fuse 115 VAC 0.5 time-lag fuse S1 Mains changeover switch for selling operating voltage 20

21 9. Commissioning Commissioning is very simple. However, check the following points once again: Inspect all the hose / pipe connections to make sure they are tight. Make sure that the threshold values for the supply voltage and compressed air have been observed. Observe the safety information and assembly instructions Close the door and the inspection hatch and ensure that no one can open the device when it is in operation. After a brief moment, you will be able to hear the flap switch into the good position Then re-start the material conveyor If the device reacts too frequently, refer back to the information in the Product Effects chapter and adapt the sensitivity to the material you are conveying. Re-setting of the sensitivity may be required after a material changeover, if the material properties have changed greatly or the device reacts too frequently. In most cases, too frequent switching is the result of conductive admixtures in the plastics. Adapting the sensitivity (responsiveness) may be required then. Place your confidence in the units and investigate the causes if the units sift frequently. With many applications, we have found that you may not get any metal report for days on end. Then, suddenly the device reacts several times in succession for an extended period of time. If this is the case, do not reduce the sensitivity immediately, but look for metals in the rejects and if you are successful, look for the causes. If there is metal in the plastic granulate due to broken off granulating milling knife pieces, then these will be distributed through a specific smaller volume of granulate. Maybe you just caught an octabine with material containing many of these little pieces and the metal detector reacts much more frequently because of the poor quality of this batch of material. Only reduce the sensitivity if you are really sure that the frequent switching occurrences are due to product effects. Granulate, which is highly contaminated with metal will result in the fact that the metal separators discharge a great deal of material (depending on the sensitivity level that is 21

22 set) and that the machines receive too little material. In that case, the strongly contaminated material should be cleaned through a separate metal collector first and then returned to production. Strongly contaminated material will cause the entire production sequence to malfunction from a certain degree onwards. There is a high degree of probability that continuous production will no longer be possible then. 22

23 10. Maintenance General maintenance The metal separator is a sensitive test device. The assembly and operation are described in this Operating Manual. Normally, the metal separator will work safely and reliably without requiring any further adjustments to be carried out after commissioning. It is however largely dependent on the conditions of use, and whether and when parts of the metal separator have to be replaced or if any setting adjustments are necessary. The paper-based laminate tube and the separating filter should be examined for wear at regular intervals in any case. During the processing of fibreglass reinforced materials or strong abrasive materials, this maintenance interval should be shortened. The exact maintenance intervals can be assessed better during the course of operation. Carry out daily or weekly checks at the beginning. The walls of the brown paper-based laminate tube can become especially thin due to strong abrasion. The paper-based laminate tube should be replaced before abrasion results in the formation of a hole. The highly sensitive ring spool (toroid) body protects against damages. If this instruction is not observed, the ring detector may be permanently damaged and will need to be completely replaced Cleaning The Mesep Extractor metal detector practically cleans itself as it blows compressed air into the cyclone every time metal is ejected. If a thorough cleaning should be necessary anyway, then proceed as follows: * Stop conveying material * Switch off metal detector and disconnect compressed air. Have all the safety instructions been observed? * Open housing roof on metal detector and open front flap. Clean cyclone with air. The metal detector is a sensitive test device. The assembly and operation are described in this Operating Manual. Normally, the metal separator will work safely and reliably without requiring any further adjustments after commissioning. It is however largely dependent on the conditions of use, and whether and when parts of the metal separator have to be replaced or if any setting adjustments are necessary. 23

24 The paper-based laminate tube should be examined for wear at regular intervals in any case. During the processing of fibreglass reinforced materials or strong abrasive materials, this maintenance interval should be shortened. The exact maintenance intervals can be assessed better during the course of operation. Weekly inspections should be carried out initially. The walls of the paper-based laminate tube and the cyclone become especially thin due to strong abrasion. Replace the paper-based laminate tube early enough before abrasion results in the formation of a hole. The highly sensitive ring spool (toroid) body protects against damages. Permanent damage to the ring detector is possible if this instruction is not observed; this will mean that it has to be replaced completely. Re-setting the sensitivity (responsiveness) may be necessary when changing from one bulk material to another. This might be necessary, for example, when switching from an undyed material to one that is dyed black, enriched with carbon black, if you experience an increase in the amount of material discharged because of metal contamination. (also see Chapter 6.3.) Anti-wear plate (optional) With fibreglass reinforced materials, we recommend using anti-wear plates. Fibreglass leads to a faster wear of the cyclone to a greater or lesser extent. When wear is well advanced, larger metal pieces can also break off and get into the production or the unit can loose its function. The plates are intended as sacrificial plates and clearly reduce the wear of the high quality cyclone, thereby helping to keep the maintenance costs as low as possible. This solution was designed so that the plates can be replaced quickly and easily as required with a few easy steps. The constant abrasion of the sacrificial plates in itself is not detectable with the most sensitive metal detection systems, as it distributes itself in the form of abrasion dust through tons of material. Thus, this is a type of wear that is always found throughout the entire conveyor system and is technology related. Replacing the plates must always occur before any larger pieces can break off. If no fibreglass reinforced or non-abrasive material is conveyed, the use of such plates is not absolutely mandatory. A retrofitting of such anti-wearing plates is possible at any time, even for the older devices. Please ask at our Head Office about such accessories Regular inspections Regular inspections on the devices are absolutely mandatory in spite of the high quality of the components involved, which could malfunction due to external influences or wear. An inspection of the separator must be carried out weekly and after maintenance stops or carrying out any repair work. In the event that malfunctions do occur, these must be rectified immediately, otherwise the machines or products, which are protected by the metal separator, will have to be taken out of operation. All the devices have a Test key on the left side of the housing. This test key can also be triggered by an external button connected in parallel. A metal signal is triggered after 24

25 pressing the button and the unit discharges material. The function of the unit can be tested in this way within a few seconds. We recommend testing the Mesep Extractor metal detector regularly with a predefined piece of test metal and recording the test results in a log book. At this time, we would also like to refer to our range of accessories, with a multitude of suitable standards test spheres. The test metal piece should consist of a sphere with the tiniest diameter that can be displayed. For test purposes, the spheres traverse through the metal separator together with the product and one observes, whether a metal signal follows. The test plan sets out when the metal separator is to be inspected, and by whom. For example: The shift electrician is to test the metal separator with the test metal piece one hour after the beginning of every shift. The test result is then recorded along with the date, time and signature in the log book. Example: Test sphere 1.5 mm FE detected, 24. August 2007, 08.30, signed J H Jones. In the event of a defect in the toroid or the electronics, repairs are only possible at the factory. The toroid is completed encapsulated with synthetic resin and is manufactured and tested in a complex process. The spool is then connected to the electronics. A series of function tests follow over several days. The units are only approved and shipped out once all the test results are successful. Repairs are therefore not possible on site. We would be pleased to provide you with a replacement unit following prior arrangements for the interim period. We have special tools at our factory with which we carry out adjustments and assembly work on the individual part in the Mesep Extractor metal detector. Only then can we guarantee the units will function perfectly upon leaving our factory. All the warranty entitlements become null and void if the user has personally tampered with the unit. If you notice any damages or faults on the units, let us carry out the inspection and repairs at the factory. Repairs frequently appear to be very simple at first glance, but fundamental things can be overlooked. Years of experience and technical patents are embodied in the units, which make them so high quality and reliable. This will save you consequential damages due to improperly carried out repairs or maintenance work. 25

26 11. Faults and Causes of Errors Frequent causes for malfunctions are incorrect settings or a lack of care with connections. Please isolate the cause of the fault using the following table. Frequently the malfunction is caused by a minor detail. If all attempts remain unsuccessful, jot down the unit number (can be found on the type plate, which is blued onto the frame) and get in touch with us. Observation Cause Remedy Irregular, very frequent metal reports. Device trips again and again after detecting metal Ejections whenever there are strong vibration/jarring Metal reports at same time as inductive or capacitive consumer switches. No metal report, although metal falling through ring detector. Check installation site: Loose screws? Sensitivity level too high on metal separator. Product effects? Severe metal contamination Excessive pressure on pneumatics causing strong vibration/jarring Strong impacts or vibrations/jarring Missing interference suppression on external components. Sensitivity setting too low Test object too small Check screws to ensure they are properly fastened Reduce sensitivity Possible black granulate, conductive product properties for material Check rejects again for metal contamination Test compressed air level bar Install pressure reducer Minimise cause of impacts See 4.2, Connection Information and 4.4, Metal separator s interference protection. Increase sensitivity Test another test object Malfunction in ring Malfunction - flap Dirty ring Large piece of metal got caught in ring Sticking or stiff flap Clean ring Malfunction compressed air No equipment-on indicator Compressed air failure or pressure too low No mains voltage Fine-wire fuse (0.5 A or 0.25 A time-lag) tripped Check compressed air 4-6 bar Check mains voltage Replace fuse What happens if the fault cannot be rectified? See Annex 13 re contacting Pulsotronic. 26

27 12. Spare Parts Solenoid valve for cleaning cyclone Flap Cellular rubber seal 1 m Funnel (cyclone) Connection neck f 38 mm Connection neck f 45 mm Connection neck f 50 mm Sheath tube for ring detector to Sheath tube for ring detector to Electronic circuit board 230/115 V

28 13. Annex In the event of technical questions, please speak to the Customer Service department or Technical Sales at Head Office. Contact: Tel.: (+49) / Switchboard Fax: (+49) / Switchboard Internet: Mail: info@pulsotronic-anlagentechnik.de 28

29 Ø10 (4x) Ø Ø Ø110 29