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BRC Metal Detection - Correct Placing of Test Pieces


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Poll: Which way is best for 175 mm diameter cakes (57 member(s) have cast votes)

What is the general consensus on the placing of test pieces when checking a metal detector

  1. Inside the product being tested (39 votes [68.42%] - View)

    Percentage of vote: 68.42%

  2. Fixed on top of the product carton being tested (10 votes [17.54%] - View)

    Percentage of vote: 17.54%

  3. Either way is good (8 votes [14.04%] - View)

    Percentage of vote: 14.04%

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#1 cakeman

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Posted 02 May 2013 - 01:27 PM

What is the general consensus on the placing of test pieces when checking a metal detector


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#2 Charles.C

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Posted 02 May 2013 - 04:08 PM

What is the general consensus on the placing of test pieces when checking a metal detector


Dear cakeman,

Maybe yr poll will indicate otherwise but i suspect that none of yr poll options, singly, match the most appropriate opinions, eg from an auditorial POV. Perhaps have a look at, say, Tesco's suggestion first.

Rgds / Charles.C
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#3 Marshenko

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Posted 07 May 2013 - 07:14 PM

As close to the center of the aperture as possible ... ?


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#4 trubertq

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Posted 14 May 2013 - 01:25 PM

I think it depends on the type of metal detector you have so therefore, according to the manufacturers instructions


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#5 w.weber

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Posted 24 May 2013 - 12:28 PM

Dear Cakeman,

usually the detetectability is lowest directly in the middle of the metal detector spool. Therefore I would suggest, to place it as close to the middle as possible (during also using a product, as this is also heavily having influence on the result. if your cake is really flat, it should be placed more on the top (closer to center of metal detector). If your product is higher, it may perhaps been put into the product.

Yours

Werner


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#6 Tina Huynh

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Posted 29 May 2013 - 09:23 AM

Dear Cakeman,

I think it depend on your product. Such as seafood bag, You  can put metal pieces on the top,uder product and between product.

Tina


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#7 campbell

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Posted 29 May 2013 - 09:57 AM

The recommendations are that the test piece should ideally be placed as close to the centre of the aperture as possible,  This may is most likely to be in the product as the peroduct should be large enough to exceed the halfway line of the detector.  if not if may be that the aperture is too big for the product.  this means that the system has not been "optimised" and could result in a non-conformance or as has previously happened going to court and being fined.


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#8 David Pham

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Posted 10 July 2013 - 02:11 PM

It should be center of the apperature but most auditors like to see the test piece embedded in the bag as a piece of foreign material would be. Also taken in to consideration is the product size that you are putting through the apperature. Robert Rogers had a really good training on this for FSL 2013. If he doesn't care I will attach a few screen caps from his presentation, unless he wants to make it available himself.


Edited by David Pham, 10 July 2013 - 03:26 PM.

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#9 Erasmo

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Posted 11 July 2013 - 02:40 AM

It always depend on the validation record and the rejection mechanism.


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#10 cazyncymru

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Posted 11 July 2013 - 03:08 PM

Safefood 360 do a very comprehensive Whitepaper on metal detection, which I can recommend

 

http://safefood360.com/whitepapers/

 

Cazx


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If a job's worth doing, it's worth doing yourself!

#11 Sumudu

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Posted 11 July 2013 - 05:03 PM

It depends on the location of the sensor. If the sensor locates top of the product, I would suggest to place the test wands on the bottom of the aperture, since that gives the maximum signal strength.

Thanks,

 

Sumu 


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#12 Ivan G.

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Posted 15 October 2013 - 11:47 AM

In our spice and sugar facility, we use both methods ( top and Bottom) with the product we are going to be running.  


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