3 System Description LB 470 Level
56925BA2 Rev. 03, 11/2017
3.2 Measuring Principle
Gamma radiation is used to penetrate a medium in a container. The attenuation
of the radiation is analysed to measure the level in the container.
The evaluation DuoXpert LB 470 (master EVU) is used for the evaluation, transmis-
sion and visualisation of measured values which it receives from the connected
detectors.
The EVU is an independent measurement channel. If several measurement chan-
nels are required, an independent EVU must be used for each channel.
For covering larger measuring ranges with level measurements, it is possible to
connect multiple detectors on a level measuring device LB 470. To do this, an addi-
tional slave module is required (optional) for each additional detector after the
first. A maximum of 16 slave modules can be connected per master EVU. A cascaded
measurement system with a maximum of 17 detectors can be set up in this way.
Further information on the functional principle of the detectors can be found
in the operating manual.
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