LB 124 Scint 2. System Description
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for rechargeable batteries, the running time left is max. 2-4
hours!
In this case, the batteries have to be replaced.
2.3 Scintillation Counter
The scintillator is deposited on a transparent carrier. The foil is
stretched over a frame and protected by a metal grid. The de-
tector is fixed to the bottom side of the device with two fixing
screws that can easily be unscrewed with the help of a coin.
The frame with foil and scintillator can easily be exchanged.
The reflector and the photomultiplier are located inside the
housing, directly behind the scintillator. Also inside the housing
there is the power supply, the electronics with evaluation and
correlation circuits as well as the evaluation electronics with the
software.
The high voltage is factory-set. The high voltage can only be
checked or modified with the help of a service adapter and by
experienced maintenance personnel.
The scintillator which has been deposited on the foil, can easily
be exchanged without having to use any special tool, e.g. if the
foil is damaged (see chapter 7.2).
When you replace the foil, please make sure that
the replacement takes place in a dry and dust free place
no humidity or dirt whatsoever can get into the gap!
you change the frame in semi-darkness, as the photomulti-
plier and scintillator are sensitive to light. Then do not work
with the device for 12 hours to allow the phosphorescence
radiation to subside.
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