Endress+Hauser Gammapilot M FMG60 FOUNDATION Fieldbus, Руководство по эксплуатации

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Installation Gammapilot M FMG60 FOUNDATION Fieldbus
20 Hauser
A
1
B C
A0018076
A Vertical beam (90°)
B Diagonal beam (30°)
C Measurement section
1 Sample point
• To increase the accuracy of density measurements, the use of a collimator is
recommended. The collimator screens the detector against environmental radiation.
• When planning, the total weight of the measuring system must be taken into
consideration.
• The Gammapilot M should be given additional support to secure it against falling or
to prevent damage to the connecting cable.
• A clamping device (FHG61) and a measurement section (FHG62) are available as
accessories →  88
Interface measurement
The measuring principle is based on the fact that the radioactive isotope (emitter) emits
radiation which is attenuated when it penetrates a material and the medium to be
measured. In radiometric interface measurement, the source is inserted into a closed
immersion pipe via a rope extension, thus preventing any contact between the source and
the medium.
Depending on the measuring range and the application, one or several detectors are
mounted on the outside of the vessel. The average density of the medium between the
radiation source and the detector is calculated from the radiation received. A direct
correlation to the interface can then be derived from this density value.
For more information, see:
CP01205F/00/EN
Density profile measurement (DPS)
To obtain detailed information on the distribution of layers of different densities in a
vessel, a density profile is measured using a multi-detector solution. Several compact
transmitters are installed next to one another on the outside of the vessel wall for this
purpose. The measuring range is divided into zones and each compact transmitter
measures the density value in its respective zone. A density profile is derived from these
values.
This results in a high-resolution measurement of the distribution of medium layers (e.g. in
separators)
For more information, see:
CP01205F/00/EN