Lock Inspection Systems MET 30+ Operating Manual page 17

Doc. Ref.No: Q875-0143/ENG Issue 2 12/01/10
Met 30+ Operating Manual
4.4.1 No Synchronising Photocell (Applicable for Pharmaceutical, waferthin,
vertical fall and pipeline systems)
Only two parameters are used in this situation: delay time and reject time.
Figure 2 : No Synchronising Photocell
When the detector detects metal it generates a trigger pulse. This starts a delay
timer. When the delay timer expires the reject relay is activated. The time for which
the reject relay remains active for can be changed by adjusting the reject time. If
there are many triggers, the reject relay will be activated after the correct delay, for
each trigger. For an immediate reject, set the delay time to 0.00.
4.4.2 Synchronising Photocell (Applicable for conveyorised systems only)
This system uses a photocell to make sure that the contaminated product is in the
correct position with respect to the reject mechanism. Four parameters are used in
this situation: delay and reject time as before, plus a photocell delay time and an
enabling alarm time.
Figure 3 : Synchronising Photocell
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