BERTHOLD TECHNOLOGIES LB 3602, Руководство по эксплуатации

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LB 379
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1.4.3 Radioactive Sources
Radioactive sources for industrial applications are generally "enclosed radioactive materi-
als" which are tightly welded into a sturdy stainless steel capsule, so that the radioactive
sub-stance cannot leak out. Contamination is therefore excluded. Moreover, for physical
reasons, any activation of the product being measured by the emitted gamma radiation is
not possible.
The following sources can be used for these measuring paths:
Radiation source Measuring path Energy of radiation Half-life
Am-241 LB 379 60 keV 433 years
Cm-244 LB 3602/3603 about 18 keV 17.8 years
Please note the Radiation Protection Guidelines in Chapter 6.
1.5 Detector
A scintillation counter is used as a detector.
The detector converts the gamma radiation picked up into electrical pulses. The count rate
transmitted to the evaluation unit is proportional to the radiation intensity received.
The detector is equipped with an automatic drift compensation which automatically corrects
component aging and temperature influences, ensuring a high long-term stability of the
measuring system.
The power supply of the detector is carried out via the fail-safe connection circuit of the
LB 444 evaluation unit.
The detector itself includes a fail-safe connection circuit to which a resistance thermometer
Pt 100 can be connected for measurement of the product temperature.
The detector assembly in a sturdy stainless steel housing protects the instrument against
normal ambient pollution in industrial applications.
The detector must not be subject to heavy mechanical stress or vibrations.
For more information on its function see chapter Fehler! Verweisquelle konnte nicht
gefunden werden..
The ambient temperatures must not exceed 50°C; otherwise adequate cooling has to be
provided.