5.2 Getting Started
40
5.2.2 Re-adjusting the Detector
Proceed as follows to ensure that the detector is in the optimum
position, i.e. exactly vertical above the source:
❏ Loosen holding of detectors slightly, so you can move it.
❏ Push <run> button of evaluation unit. The measured counts are
displayed.
❏ Carefully move the detector forward and back to find the posi-
tion where it is measuring the most counts.
❏ If you have found the correct position, fix the detector with
screws so it cannot move anymore, not even if vibrations occur.
❏ Push <run> once more to stop the measurement.
Rod source
Figure 25: Detector window facing the source
Schematic layout
Detector holder
Detector
Detector window
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