Uni-Probe LB 490
BERTHOLD TECHNOLOGIES GmbH & Co. KG
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Volume 2 1 System Description
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Figure 1-5 Rod source arrangement
1.4.2 Rod Detector Arrangement
Figure 1-6 shows an arrangement with rod-shaped detector and
point source. The length of the rod detector determines the length
of the measuring range; for larger measuring ranges it is possible
to work with several detectors.
For unfavorable measuring geometries one can also work with two
point sources. As the characteristic curve shows, the measuring
geometry results in non-linearities which are compensated for by a
correction line that is adjusted to the measuring site and stored in
the evaluation electronics.
The required tag-specific calculations will be provided by
BERTHOLD TECHNOLOGIES.
Figure 1-6 Rod detector arrangement
1.4.3 Rod Source / Rod Detector Arrangement
For measuring geometries with an unfavorable ratio between mea-
suring range and the source - detector distance or for very thick
vessel walls, one can choose an arrangement with rod source and
rod detector to reduce the source activity (see Figure 1-7). In this
Rod
source
Level
Detector signal
Detector
Level
Detector signal
Detector
Point
sources
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