Density Meter LB 444 SECTION 2. SYSTEM DESCRIPTION
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2.3 Measuring Configuration
To cover a desired measurement range continuously, a configuration must be
realized where the dimensions of source and detector cover a measuring field of
equal size. The different options available to accomplish this are described be-
low.
The specific arrangement chosen depends on the measurement range and on
the geometry resulting from the measuring task. Moreover, construction factors
and customer-specific requirements may have an effect on the instrument se-
lection. The specific choices and selections are made during the planning stage
and must be implemented during assembly and commissioning.
A measuring system for density, concentration and mass flow measurements
typically comprises the following components:
a) Radioactive source
b) Shielding container
c) Detector
d) Evaluation unit LB 444
e) Mounting device
f) Connection cable
g) Resistance thermometer Pt 100 (option)
h) Cooling jacket for detector (option)
Detector power and output signals use a common two-wire cable connected
between detector and evaluation unit.
Different configurations and mounting devices may be required, depending on
the measurement tasks, the condition of the product being measured and the
pipe or container.
“
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Shows a basic setup
in a
pipeline
with Pt-100 resistance-thermometer and a 90°-mounting device for
density, concentration and mass-flow measurement.
Figure 2: Measuring system mounted on a straight pipeline
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