Chapter 1: FT-50 System Overview
1-5
To allow for slight variances in the fill level an upper gamma
threshold and a lower gamma 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 gamma threshold, it is an underfill; conversely if it exceeds
the gamma threshold, it is an overfill.
How Underfill Inspection Works
The FT-50 is positioned so that containers pass through gamma
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 gamma 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 gamma count at the
detector is higher than the good state and the underfilled container
is detected as faulty.
How Overfill Inspection Works
The FT-50 is positioned so that containers pass through the gamma
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 gamma 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 gamma count at
the detector is lower than the good state, and the overfilled
container is detected as faulty.
Industrial Dynamics Company, Ltd.
Document 40255-0600
Содержание FT-50c
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