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2 Product description
MINITRAC 31 • Foundation Fieldbus
62076-EN-190704
radiation is dependent on the density of the measured media. The
measuring principle has proven to be very reliable in conjunction
with extreme process conditions because it measures contactlessly
from outside through the tube wall. The measuring system ensures
maximum safety, reliability and plant availability independent of the
medium and its properties.
2.3 Corresponding source container
A radioactive isotope in a suitable source holder is the prerequisite for
a radiometric measurement setup.
The handling of radioactive substances is regulated by law. The radia-
tion protection rules of the country in which the system is operated
apply first and foremost.
In Germany, for example, the current radiation protection ordinance
(StrlSchV) based on the Atomic Energy Law (AtG) applies.
The following points are important for measurement with radiometric
methods:
A handling permit is required for operation of a system using gamma
rays. This permit is issued by the respective government office or the
responsible authority (in Germany, for example, offices for environ-
mental protection, trade supervisory boards, etc.)
You can find further instructions in the operating instructions manual
of the source container.
When handling radioactive sources, unnecessary radiation exposure
must be avoided. An unavoidable radiation exposure must be kept as
low as possible. Take note of the following three important measures:
1
2
3
Fig. 3: Measures for protection against radioactive radiation
1 Shielding
2 Time
3 Distance
Shielding
: Provide good shielding between the source and your-
self as well as all other persons. Special source containers (e.g.
VEGASOURCE) as well as all materials with high density (e.g. lead,
iron, concrete, etc.) provide effective shielding.
Time
: Stay as short a time as possible in radiation exposed areas.
Handling permit
General instructions for
radiation protection