Filtec FT-70c, Сервисное и техническое руководство

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Chapter 1: FT-70 System Overview
1-5
To allow for slight variances in the fill level an upper x-ray
threshold and a lower x-ray threshold are plotted. The upper and
lower thresholds form the tolerance range of the master profile.
Any scanned container that falls outside of this tolerance range
fails the inspection. If the containers profile exceeds the upper
x-ray threshold, it is an underfill; conversely if it exceeds the x-ray
threshold, it is an overfill.
How Underfill Inspection Works
The FT-70 is positioned so that containers pass through x-ray beam
at a point just below the desired fill level point on the container.
As normally filled containers pass through the beam, the contents
block a portion of the radiation which reduces the x-ray count at
the detector. This count condition is the normal count, also called
the good state.
When an underfilled container passes through the
beam there is less mass in the beam path so the x-ray count at the
detector is higher than the good state and the underfilled container
is detected as faulty.
How Overfill Inspection Works
The FT-70 is positioned so that containers pass through the x-ray
beam at a point just above the desired fill level point on the
container.
As normally filled containers pass through the beam, the contents
block a portion of the radiation which reduces the x-ray count at
the detector. This count condition is the normal count, also called
the good state
. When an overfilled container passes through the
beam there is more mass in the beam path so the x-ray count at the
detector is lower than the good state, and the overfilled container
is detected as faulty.
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