We have a pipeline Metal detector to check our products(Sauces). we carried out a challenge testing using a metal clip which we use to seal our bags. the metal detector alarms, but the piece does not get rejected into the reject bin. we had to dismantle the depositor and the pipes and found the pieces inside the depositor. we thought this could be due to reject delay timing set on the MD, but even after increasing the timings it did not help. For me this is a complete failure of our CCP.
We called the external engineers who calibrate our machines to be told we might have to change our metal detector.
can anyone help on how we can get around this issue, is there an industry guideline for pipeline MD?