useful if you know it still works. So operators run a certified test piece through it at set intervals to confirm the system detects and rejects contamination. Usually it’s a small metal sphere set inside a plastic disc or rod, colored bright blue so it’s easy to spot in food, which is naturally never blue.
Here’s the part that matters. Each test piece is counted out and counted back in. Send five through, you should recover five. If one goes missing, the line is meant to stop while people hunt it down. The whole point of the exercise is to make sure an object like this never rides through undetected. A test piece turning up in a sealed bag means, at some point, the count didn’t add up the way it should have.
Decoding “Ferrous 25mm BST” and the Cert Number
The writing on the
There’s more to discover. Continue to the next page for the rest of this article.
