BERTHOLD TECHNOLOGIES LB 6775, Руководство по эксплуатации

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LB 6775 3 System Description
63039BA2, Rev. 01, 07/2018
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System Description
3.1 Measuring Principle
The device is used for non-contacting and continuous determination of the density
of a product by applying radiometric measuring technology. For this purpose, the
radiation of radioactive material is quantitatively measured. If the radiation pene-
trates the measuring container (e.g. pipeline), its intensity is reduced. This intensity
reduction is proportional to the density of the penetrated medium.
A complete measuring system includes the following components:
•
Radiation emitter inside shielding
•
Mounting fixture for radiation emitter and detector
•
Detector for radioactivity
This operating manual refers to the operation of the detector unit. The operation
of the remaining system components is subject of the independent operating man-
uals of the particular system components.
NOTICE
This is a class A device (industrial area). This device may cause radio interfer-
ence in residential areas.
System Integration
•
The signal output is proportional to the measured count rate or the natural
logarithm of the count rate.
•
Adjustable signal output: 0 … 10V (Voltage) or 0/4 … 20 mA (Current).
•
Alternative method of process connection: direct via RS 485 Modbus RTU to a
suitable control system or control device.
•
The evaluation of the density resp. pounds proppant per gallon (PPG) or pounds
proppant added (PPA) has to occur in the control system.