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9
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ME12044A
5.2.3
Model without a direct-beam monitor
First, initialize the scintillation counter (SC). Selecting “ADJUST”
→
“I Detector” in the control
software pops up the dialog box shown in Figure 5.8. There, enter the values HV = 900, Base line
= 0.5, and Window = 3.0, and click on [OK]. Ignore the other settings, regardless of what their
values are.
Figure 5.8 Scintillation Counter (I-counter) Setup Screen
In this condition, open the shutter and measure the intensity of the direct beam. Select the [FT] tab
in the Counter dialog box, and set the FT time to 0.5 sec and the FT cycle number to 300, then
click on [OK]. This will start the measurement. Use the X-ray-tube adjustment knob to adjust the
position of the X-ray generator section. Set the knob to a position at which the X-ray intensity
reaches its maximum. Once the X-ray-tube position has been established, fasten the tube securely
by tightening the fixing screw. If the X-ray intensity is too low, increase the X-ray load (by turning
up the X-ray tube voltage or tube current). If no X-rays are detected, widen the divergence slit.
