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Metal detection best practice guide wanted!


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#1 birmingham2000

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Posted 16 September 2011 - 09:31 PM

Does anyone have a guide for Metal detection best practice?

For example - we are using a 2mm test piece ferrous, why is this size used and how do you prove it is correct?



#2 HPG

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Posted 17 September 2011 - 03:00 AM

Does anyone have a guide for Metal detection best practice?

For example - we are using a 2mm test piece ferrous, why is this size used and how do you prove it is correct?


Dear birmingham2000,

if you looking for the sensitivity of metal detector, you can read the article from AIB or COP from Tesco.
You can search in this site.

Regards,
Hadi

#3 birmingham2000

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Posted 17 September 2011 - 09:25 AM

Can you post the link?

Thanks



#4 Charles.C

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Posted 17 September 2011 - 11:23 AM

Can you post the link?

Thanks



Dear birm-m,

Attached File  tesco.png   19.2KB   200 downloads

thread - UK retailer codes ...
1st post
attached document 198

Rgds / Charles.C

Kind Regards,

 

Charles.C


#5 HPG

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Posted 17 September 2011 - 02:18 PM

Can you post the link?

Thanks


Dear birmingham2000,
try look in this thread, #1
http://www.ifsqn.com...h__1#entry37039

And you can also use the link that Charles C. posted.
Hope it'll help, good luck

Regards,
Hadi

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#6 Joe Gianfalla

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Posted 20 September 2011 - 12:56 PM

Hi, METTLER TOLEDO Safeline offers a free 63-page guide entitled "Reduction of Metal Contamination - Building an Effective Program" - see attached file for preview. It also covers metal detection standards and properly challenging your metal detectors.

Attached Files



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#7 Dr Ajay Shah

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Posted 26 September 2011 - 06:16 AM

Dear Birmingham 2000,

You have to bear in mind that every metal detector is different in terms of its sensitivity. The more money one spends then they can get a better metal detector. You can consult the metal detector manufacturer such as Metteler Toledo Safeline, Lock etc and they can guide you regarding sensitivity whcih will alter with moisture content and salt content.

You might find that the same metal detector is able to puick up sensitivity of 1.5mm ferrous will be different for a different product with varying moisture content.

i hope that I have clarified things for you.


Dr Ajay Shah.,
BSc (Hons), MSc, PhD, PGCE(FE)
Managing Director & Principal Consultant
AAS Food Technology Pty Ltd
www.aasfood.com


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#8 birmingham2000

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Posted 27 September 2011 - 03:17 PM

I found this in depth guide, which may be of use

http://www.adsdetect...ction-Guide.pdf



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#9 Charles.C

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Posted 28 September 2011 - 02:27 AM

Dear Birmingham,

Useful document. Thanks.

Two comments –

Apparently freezing a food changes its status for analysis from “conductive “ to “non-conductive” (Pg3). Why ? Speed of electrons ?

Similarly –

The following diagram (Pg7) shows that configuration “A” provides the biggest signal (easiest to detect), in ferrous-type wires, while configurations “B” and “C” provide the smallest signal (most difficult to detect). Similarly, in non-ferrous and stainless steel wires the opposite is true (i.e. “A” provides the smallest signal and “B” and “C” provide the biggest signal).


Why ?

From memory of other guides, frozen foods are particularly prone to suffering detector instability, didn't see any mention of this.

Rgds / Charles.C

Kind Regards,

 

Charles.C





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