We have purchased 2 new Fortress Vertex Metal Detectors to use on our production lines. Our current metal detectors are spec'd for 1.0, 1.0 & 1.5 detection. The new devices are only spec'd for 2.0. We have tested the new devices and they are detecting the 1.0, 1.0 & 1.5 and we intend to test them at these levels.
My question is, if we are testing them at the lower levels do we have to raise our critical limits to 2.0 because of the equipment spec's or can we keep our critical limits at the level that we are testing them at?