Endress+Hauser gammapilot FTG 671, Operating Instructions Manual

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2.2 Installation hints for source container and detector
Warning!
•
All activities such as mounting, dismounting and exchange of the source or detector
must be done by specially trained staff or radiation protection officials only, under
strict observance of the governing rules and regulations.
•
When equipment is being installed in explosion hazardous areas, observe the in-
structions on the certificates accompanying the equipment as well as your local ru-
les and regulations.
Source Radiometric systems are normally equipped with double-encapsulated
137
Cs or excep-
tionally
60
Co sources complying to DIN 24426/ISO 2919 classification 66646. This is
acknowledged to be the highest safety classification governing industrial source con-
tainments.
Source Container The gamma rays emitted by the radioactive source radiate equally in all directions. In
level measurement, however, only that radiation which travels through the vessel is
required. All radiation in other directions is unwanted and must be shielded off. For this
reason, the capsule containing the source is located in the source container, ensuring
that unattenuated radiation can be emitted in the required direction only.
free height to take off
the cap
BA082E06
Radiation emission angle 5
o
, 20
o
oder 40
o
Fig. 2.1:
Source container
QG 020/QG 100
Standard design
BA082E68
Fig. 2.2:
Source container
QG 2000
Standard design
Gammapilot FTG 671 Chapter 2: Installation
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