Endress+Hauser Gammapilot FMG50 - Page 7

Gammapilot FMG50
Endress+Hauser 7
Density measurement to determine the mass flow
A source container with a radiation source and a Gammapilot FMG50 (to receive the gamma
radiation) are mounted on opposite sides of a pipe. The radiation emitted by the radiation source is
absorbed by the medium in the pipe. The denser the medium in the radiation path between the
radiation source and the detector, the more radiation is absorbed. Consequently, the Gammapilot
FMG50 receives less radiation as the density of the medium increases. This effect is used to
determine the current density of the medium in the pipe. The density unit can be selected from a
menu. The density signal of the Gammapilot FMG50 can be combined with the signal of a volume
flowmeter, e.g. Promag 55S, and the mass flow can be calculated from these two signals.
Additional features are required when ordering a Promag 55S for mass flow measurement:
• Order option: "Solids stream" software function (F-CHIP)
• Order option: Current input
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2
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1 Volume flowmeter
2 Gammapilot
3 Density measurement
Concentration measurement
A source container with a radiation source and a Gammapilot FMG50 (to receive the gamma
radiation) are mounted on opposite sides of a vessel. The radiation emitted by the radiation source is
absorbed by the medium in the vessel. The denser the medium in the radiation path between the
radiation source and the detector, the more radiation is absorbed. Consequently, the Gammapilot
FMG50 receives less radiation as the density of the medium increases. This effect is used to
determine the current density of the medium in the vessel. Using the linearization function, the
corresponding concentration can be assigned to the medium density and the Gammapilot FMG50
displays concentration values. The concentration unit can be selected from a menu.
Concentration measurement with radiating media
The Gammapilot FMG50 is mounted on the side of a measuring pipe. Radiating medium is conducted
past the Gammapilot. The Gammapilot FMG50 can determine the concentration of the radiating
content in the medium based on the intensity of the gamma radiation given off by the radiating
medium.
Interface measurement
A source container with a radiation source and a Gammapilot FMG50 (to receive the gamma
radiation) are mounted on opposite sides of a vessel. If an FQG63 source container is used, the
radiation source can also be inserted into a vessel using an immersion tube. This excludes the
possibility of contact between the radiation source and the medium. The radiation emitted by the
radiation source is absorbed by the media in the vessel. The denser the medium in the radiation path
between the radiation source and the detector, the more radiation is absorbed. Consequently, the
Gammapilot FMG50 receives less radiation as the density of the medium increases. This effect is
used to determine the current density of the medium in the vessel. The Gammapilot FMG50
calculates the position of the interface layer from the intensity of the radiation received. Its value is
between 0% (lowest possible position) and 100% (highest possible position).