Sensitivity - Lock Inspection Systems MET 30+ Operating Manual

Doc. Ref.No: Q875-0143/ENG Issue 2 12/01/10
Met 30+ Operating Manual
tablets or packaging materials e.g. metallised film or recycled cardboard as well as
salt content and fat content.

11.9 Sensitivity

The smallest size of metal contaminant that can be reliably detected without false
triggering. If the detector is too sensitive, unwanted rejection of good product will
take place. If the detector is not sensitive enough, metal contamination may be
missed. Sensitivity can be changed in the software by changing the product
parameters.
11.10 Systemchek
A means of verifying that the reject mechanism has operated when required to do so
(reject systemchek) or that the contaminated product has entered the reject bin
(product systemchek). It is controlled by one or two photocells connected to the PSU
and settings in the software.
11.11 Test Sample
When a metal detector is shipped by Lock, a test sample is sent with it. This is a
small piece of metal embedded in plastic or a laminated card. This can be used to
test the basic sensitivity of the metal detector, i.e. the sensitivity of the detector
without compensating for product effect.
11.12 Trigger
When the metal detector detects metal. It is indicated by the bargraph showing solid
circles, and the reject count incrementing.
11.13 VFD – Vacuum Fluorescent Display
The standard metal detector has a three key membrane and a VFD display. The
VFD display is a bright two-line character display.
11.14 ELD – Electroluminescent Display
A 320 x 240 Quarter VGA graphics display with touch screen interface. The EL
display features Lock Inspection Systems ADC graphic's software, which provides
operation and maintenance staff with an on-screen diagnostic tool.
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