FT-70/75 Fill Level Inspectors Operator’s Guide
1-4
Fill Level Inspection Basics
The FT-70/75 Fill Level Inspection systems utilizes a Container
Radiation Profile Comparison Principle to create a radiation finger-
print of the container.
To create a radiation profile a x-ray beam is directed through the
container. Some of the radiation is blocked by the container
material and container’s contents while the remaining x-rays
emerge from the opposite side of the container where they are
measured by an x-ray detector.
The amount of radiation measured is the containers Radiation
Profile, or fingerprint, which is then compared against a
Master
Container Profile
.
Figure 1-2.
Scanning the container.
To allow for slight variances in the fill level an Underfill Threshold
and Overfill Threshold are determined (both for the FT-75 and one
or the other for the FT-70). These thresholds form the tolerance
range for deviation from the Master Profile. This tolerance range
between the thresholds is called the Target Zone. Any container
with an x-ray count that falls below the Underfill Threshold is
rejected as an underfill and any container with a X-ray count that
rises above the Overfill Threshold is rejected as an overfill.
?
6
INDUSTRIAL DYNAMICS
Torrance, California USA
MODEL FT-50
FILL LEVEL INSPECTOR
4
3
5
1
2
1
3
2
No.
Description
1
X-ray Source
2
X-ray Beam
3
X-ray Detector
Industrial Dynamics Company, Ltd. Document 40274-0600
