Commissioning
Gammapilot M FMG60 FOUNDATION Fieldbus
66
Hauser
Full calibration
Full calibration refers to the following situation:
• The radiation is switched on
• The vessel is filled as much as possible (ideally 100%, at least 60%) within the
measuring range.
If the vessel cannot be filled to at least 60% during the calibration, the full calibration can
alternatively be performed with the radiation switched off. This is a way of simulating a
vessel that is 100% full. In this case, full calibration is identical to background calibration.
As the pulse rate of the background calibration is automatically subtracted, the pulse rate
displayed is around 0 cps.
This type of simulated calibration is not possible with self-radiating media. In this
case, the vessel must be filled to 100% to perform the background and full calibration.
Empty calibration
Empty calibration refers to the following situation:
• The radiation is switched on
• The vessel is emptied as much as possible (ideally 0%, at least 40%) within the
measuring range.
Calibration points for point level detection
A
B
C
ON
OFF
ON
A0018112
A
Background calibration
B
Covered calibration
C
Free calibration
Background calibration
Background calibration refers to the following situation:
• The radiation is switched off.
• The radiation path is completely covered
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. 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.
Covered calibration
Covered calibration refers to the following situation:
• The radiation is switched on
• The radiation path is completely covered, where possible
If the radiation path cannot be completely covered during the calibration, the covered
calibration can alternatively be performed with the radiation switched off. This is a way of
simulating a completely covered radiation path. In this case, covered calibration is identical
