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

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Gammapilot M FMG60 FOUNDATION Fieldbus Commissioning
Hauser 65
Default value
The default value depends on the selected "Measurement mode" (*05) :
• Level: 6 s
• Switch: 6 s
• Density: 60 s
• Concentration: 60 s
Selecting the output damping value
The output damping value depends on the process conditions. Increasing the output
damping value makes the measured value considerably steadier but also slower. In order to
reduce the influence of stirrers or turbulent surfaces, it is advisable to increase the output
damping value. However, the value selected for output damping should not be too large so
that rapid changes in the measured value can also be detected quickly.
7.4 Calibration for level measurement and point level
detection
7.4.1 General principles
The calibration points for the measurement are entered in the "Calibration" (*1) function
group. Each calibration point consists of a level and the associated pulse rate.
Calibration points for level measurement
A B C
ON
OFF
ON
A0018111
A Background calibration
B Full calibration
C Empty calibration
Background calibration
Background calibration refers to the following situation:
• The radiation is switched off
• The vessel is filled as much as possible (ideally 100%) within the measuring range
The background calibration is necessary in order to register the natural background
radiation at the mounting position of the Gammapilot M. The pulse rate of this
background radiation is automatically subtracted from all other measured pulse rates. This
means that only the part of the pulse rate which originates from the applied radiation
source is displayed and taken into account during signal analysis. As the background
radiation remains virtually constant for the entire measurement duration (as opposed to
the radiation of the source used), background calibration is not included in automatic
decay compensation of the Gammapilot M.