Archive for the ‘Metal Detectors’ Category

Are you looking for a Goring Kerr Tektemat 1 Installation and Operation manual?

Purchase the complete Goring Kerr Tektemat 1 User Manual today.  After purchasing you will receive a PDF file containing the complete Installation and Operation manual for the Goring Kerr Tektemat 1 metal Detector.

Purchase today and receive a 35% discount off the regular price.

Have questions?

Leave us a message, our staff have over 20 years experience in the Industrial Metal Detection industry and are intimately familiar with all models of Goring Kerr metal detectors.

Many food manufactures require metal detection equipment either  to protect upstream machinery or product integrity.  Either way metal detectors used within conveyor applications are often seen as a non-value added machine.  Although the metal detector doesn't actively modify the product or add new value to standard products it does play an important role in the overall product value for your company.

Used Conveyor Metal Detectors

Many companies turn to the used metal detector market for their needs when purchasing an industrial metal detector.  This is often a good way to start when first using a metal detection system.  Some key points to remember when purchasing a used metal detector. 

• Is the metal detector functioning correctly?
• Is the conveyor belt clean and free of contamination?
• Will your product (candy boxes, bread, etc..) pass through the metal detector opening easily?
• Was the used conveyor metal detector built for your type of product?

These are some basic question you should ask yourself when purchasing a used metal detector system.  As you research further to understand the systems performance make sure you ask the seller for performance capabilities so that you are well protected.

There are many factors that influence how a conveyor metal detector performs.  The ability to detect metal fragments within any given food, such as bread candy chocolate or meat, depends on a range of factors.

• Type of metal
• Shape of metal
• Orientation of metal
• The opening or aperture of the metal detector
•  Location of metal within the aperture
• Environmental conditions
• The type of product and its consistency
• Operating frequency of metal detector
• Speed of production line

All of these factors and the combination of them and further the variance of them can greatly impact how a metal detector performs.

Lets talk about one of those factors “Metal Orientation”

Metal detector companies such as Safeline, Loma, Fortress Technologies, Goring Kerr, also known as Greaseby Goring Kerr and Thermo Goring Kerr, Eriez and more all rate their performance based on small spheres of metal.

Why do metal detectors use spheres to test performance?

A sphere is the only shape that has the same shape regardless of how you look at it.  No other shape when turned and rotated presents the same shape.  It is this reason alone why all industrial conveyor metal detector companies use a sphere to test performance of an industrial metal detector.  It is common practise to place this test sample inside the product being inspected and passed through the metal detector just as it would in production.  This is done so that you can best simulate a real world condition of having a metal contaminate in your product.  The frequency or how often you should test a metal detector is dependant on your company policy and risk aversion.

Metal orientation is a nightmare for any metal detector and an untold problem within the metal detection industry.  In the real world metal fragments come in all shapes and size and are placed anywhere within the product.  This wide range of variations makes it almost impossible to guarantee any real life performance for the food industry. 

Metal detectors only see cross-sectionally

When metal is passing through the metal detector the metal detection systems only see’s the cross-section of the piece of metal.  This is one of the main reasons spheres are used, their cross-section doesn’t change when you change the location of the sample.  However, in the real world metal fragments have changing cross-sections and are highly unpredictable. 

Learn more on how to test your metal detector for the inspection of candy, ground beef, cheese, chocolate, cereal and more.

Read more on the correct testing procedures in the Goring Kerr Manual, Graseby Goring Kerr Manual and the Thermo Goring Kerr Manual

The Goring Kerr DSP 2 metal detection system has an integral fault detection system.  This feature automatically tests the system regularly for a wide range of potential system failures. 

Understanding these system faults and correctly troubleshooting them is important in reducing downtime. 

From the Thermo Goring Kerr DSP 2 User Manual

“If the detector senses a system fault the fault LED will turn on, the fault relay will change state and a fault message will be displayed at the top menu. Press the fault button display to access a description of the fault. If there is more than one fault, press next fault to view the next fault description. The following is a description of the type and source of faults which can occur:”

For a complete manual on how to diagnose the Goring Kerr DSP 2 metal detector download your manual today.

Muchas empresas poseen un detector de metales a fin de pasar o auditorías internas o externas, pero están trabajando? 

A menudo las empresas que ven en la detección de metales como un mal necesario dejar de reconocer el verdadero valor a su negocio. Aquí hay algunas pautas prueba muy simple para las pruebas de los detectores de metales utilizados para la inspección de cereales, harina, goma de mascar, queso, carne, pellets de plástico, papel y así sucesivamente. 

1) prueba con la producción de productos 
Asegúrese de que el producto pasa por el detector de metales sin causar un falso rechazo.Consulte el manual del propietario para la configuración correcta. Puede descargar todos los manuales de Ker Goring aquí. 
2) Coloque la muestra de prueba de metal en el medio del producto 
Es fundamental para la toma de muestras en el interior del producto de manera que los lugares de la muestra de metal en el centro (de arriba abajo y de izquierda a derecha) de la abertura de la cabeza de detección. Esto coloca el contaminante en el punto más débil para la detección y le protegerá de la mayoría. 
3) Permitir que el sistema completo para rechazar el producto 
¿De qué sirve un rechazo del dispositivo, como un colgajo (o flip) Puerta, retracción, Kicker, chorro de aire o de otro dispositivo si no lo ponen a prueba. Visto el detector de metales detectar metales es sólo una parte de la respuesta. Tener que rechazar el producto defectuoso es la historia completa. Deje que el sistema de seguimiento a través de, como si no estuviera allí. Consulte el manual de funcionamiento para la configuración correcta 
4) Prueba de 10 veces para el rechazo del 100% 
Prueba de prueba y volver a probar. Pasando 10 paquetes (todos diferentes) a través del sistema le dará un alto nivel de confianza que el sistema está funcionando correctamente. Si alguno de ellos no tomar esto como una advertencia a los posibles problemas ocultos. 

Para obtener más información sobre cómo probar y configurar un detector de metales Goring Kerr descargar el manual de los fabricantes. 

The model 402 system is supplied completely assembled and tested from the factory.  Four mounting holes are located at the top of the frame to support this system. The typical mounting method is to suspend the system with threaded rod. The threaded rod should support the complete load of the system. When securing the threaded rod to the 402 frame isolation bushings should be used on all four mounting holes. This will electrically isolate the frame from any support structure. The 402 system is not designed to support piping from any of the ports. Piping connected to any of the ports should be independently supported. Hanging piping from the reject value may distort the valve body and cause unreliable rejection.

Why is the metal free area (or zone) important when installing a metal detector?

Industrial metal detection systems function under the same principles as AM (Amplitude Modulated) radios do.  Now many of you may have forgotten what it was like to listen to AM radios but for those who do remember the one thing that stands out is noise interference.  These interferences are very similar to the external interferences faced with industrial metal detection equipment.  All industrial level metal detection systems suffer from the same inherent problem, electromagnetic radiation from the opening.

This ‘radiation’ is what companies like Safeline, Thermo Goring Kerr, Loma, Fortress Technology, Bunting and others call the metal free area or zone.  The distance away from the edge of the enclosure (where the product passes through) on both sides is what is termed the metal free zone.  This distance is critical for both installation requirements as well as performance capabilities.  Having metal within this area can cause havoc in your process environment.  You can expect false positive rejects, sporadic rejection to a reduction in performance.  The rule of thumb for many companies is that there should be no metal objects, including conveyor support structures to rollers, within `1.5 to 2.0 times the smaller opening dimension away, on each side.  Now this is a rule of thumb and can change based on the manufacturers specifications. 

When purchasing a used metal detector on a conveyor system you can not assume the installation is correct.  Often companies alter the configuration of the sensing head or various mounting components in a way that interferes with the overall performance of the system.

If you have purchased a used Thermo Goring Kerr or (Goring Kerr) metal detector it is critical you confirm that the installation requirements have been followed.  You can download these manuals here today. 

Are you looking for a Goring Kerr DSP 1 Installation manual?

Purchase the complete Goring Kerr DSP 1 Installation Manual today.  After purchasing you will receive a PDF file containing the complete user manual for the Goring Kerr DSP 1 metal Detector.

Purchase today and receive a 35% discount off the regular price.

Have questions?

Leave us a message, our staff have over 20 years experience in the Industrial Metal Detection industry and are intimately familiar with all models of Goring Kerr metal detectors.

Thermo Goring Kerr AuditCheck is an optional system that, if not installed at the factory, can be easily installed in your DSP3. It is an automatic means of checking the calibration of both sensitivity and phase angle. It is used to check the phase and sensitivity calibration of the DSP3. AuditCheck simulates the presence of a metal contaminant in the product by “firing” a metal ball through the search head coinciding with a product passing. The metal ball does not come into contact with the product. It is fired through part of the search head that is segregated from the main aperture.

Excerpt from Thermo Goring Kerr DSP 3 Auditcheck manual

Theory of Operation

To understand the benefits of AuditCheck it is necessary to determine what is meant by sensitivity of a metal detector head. As an example a common head sensitivity of 1mm ferrous and 1.2mm non-ferrous indicates the head is capable of detecting spherical piece

of ferrous material with a diameter of 1.0mm or a spherical piece of non-ferrous material with a diameter of 1.2mm All products have their own effect on a metal detector. In some cases, this effect is small (such as products referred to as “dry” products). Other products have a much larger effect (such as products referred to as “wet” products). Any metal detector must be capable of correctly compensating for such product effects so uncontaminated product is not rejected. The AuditCheck system is a true quantitative measurement of sensitivity since it actually passes a test piece through the head magnetic field and measures the resultant head signal in the presence of product.

The AuditCheck system has been designed to provide the ideal automatic sensitivity test for metal detectors. AuditCheck takes advantage of the fact there is a fixed relationship between the sensitivity at each point in a metal detector field and by firing the ball through the same magnetic field as the product, AuditCheck produces the same effect as if a metal contaminate were in the product. Figure 1 illustrates the essential elements of AuditCheck. A tube is inserted into the metal detector case along the line “AB” that is

within the active magnetic-field area of the head. A test piece (molded into a plastic shuttle) is able to travel along the line of the conveyor or pipeline from “A” to “B” and return from “B” to “A”. As part of the automatic setup and calibration the test piece, under the control of the central processing unit (CPU), is fired from “A” to “B” simultaneously with the product. The resultant metal detection signal can then be measured in the presence of the product.

The test piece returns under the control of the CPU from “B” to “A”.

 The TEK 21 metal detector operates on the balance coil full loop detection system. Three equally spaced coils surround the aperture or opening through which the product to be inspected passes. The center coil is connected to an oscillator circuit to produce an electromagnetic field. This signal is received by two coils on either side of the oscillator coil.

These are the receiving or input coils

Since the receiving coils are equally spaced from the oscillator, they receive equal mounts of signal. The coils are wound in such a way that their signals oppose each other; therefore, the net signal across the coil is zero.

When a piece of metal enters within the electromagnetic field, it alters the field strength around it. As this metal passes through the aperture, it changes the balance of the receiving coils so that the net signal is no longer zero. This error is then greatly amplified, compared in phase to the original oscillator signal and passed to the timing circuits. Eventually, it operates the reject relay. 

A metal detector is a high performance measuring instrument; the search head being the transducer. The quality of the installation will have a direct effect upon performance and reliability.  For more information and the complete Goring Kerr Tek 21 manual download today here.