BERTHOLD TECHNOLOGIES LB 444 - 3.4 Evaluation Unit LB 444

04/03 347 LB 444
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3.3 Detector
A scintillation counter is used as 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 cor-
rects 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 thermome-
ter 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 1.
The ambient temperatures must not exceed 50°C; otherwise adequate cooling has to be
provided (see also chapter 5.2.3).
3.4 Evaluation Unit LB 444
3.4.1 General Description
The evaluation electronics is
designed as a 19" module. It
includes the microprocessor-
controlled evaluation elec-
tronics and the power supply
for the required operating
voltage. A 32 bit microproc-
essor featuring a menu-
structured software specially
designed for density meas-
urements is used for signal
processing.
enter
clear run
BERTHOLD
LB 444 - 1 V 1.0
Density -Meter
more
enter enter
enter
clear
run
LCD display
Softkeys
Function keys
Figure 8: Front Panel LB 444