"Integrity" is another one of those beautifully subjective terms. I noticed another text using the term "functional integrity" (FI).
Google gives "the state of being whole and undivided".
I interpreted the wording of the BRC clause as intending cleanliness should be separated from integrity but I do agree with you that the former could potentially relate to FI.
Interesting to know what the BRC I.Guidelines have to say (if anything).
Your wish is my command! Not sure it totally clears it all up but sounds like we are on the right track.
The type, location and strength of magnets shall be fully documented. Documented procedures shall be in place for the inspection, cleaning, strength testing and integrity checks. Records of all checks shall be maintained.
Some sectors of the food industry (e.g. grinding of cereals, coffee etc.) employ magnets to reduce or remove metal fragments. Where these are used, it is important to document the type (e.g. electromagnet or permanent magnet), location and strength of the magnet.
Magnets are not an alternative to metal detectors but an additional control mechanism, and factories using magnets must still comply with the requirements of clause 4.10.3.
The magnet’s strength should be designed to ensure that it is sufficient to capture metal foreign bodies. A number of factors should be considered when determining the correct strength – for example, the type of product (e.g. the size of the food particles), the width of the conveyor belt, chute or other equipment in which the magnets are located, and the flow rate of the food or raw material.
Documented procedures must be in place to ensure:
•routine inspection – for example, visual inspection for damage and the presence of captured metal fragments
•cleaning – the ability of a magnet to capture a foreign body can be hampered if dirt or other material is allowed to collect on the magnet’s surface
•strength testing – for example, by using a magnetic meter (measuring the magnet’s strength in tesla) or through the use of a third-party calibration service.
Records of all checks, recalibrations or servicing must be maintained.
Good practice to monitor a magnet’s performance includes locating a second ‘policing’ magnet as close to the first as possible. Any metal found on this second magnet indicates that the ‘process’ magnet is not performing satisfactorily and is failing to remove all metal particles.