Fluke Biomedical 07-611 - Manual (Page 7)

Operation
X-Ray Tube Focal Spot Measurements
2
2-1
Section 2
Operation
2.1 X-Ray Tube Focal Spot Measurements
2.1.1 Purpose
To assure that the tube and x-ray tube focal spot size is within acceptable limits.
2.1.2 Equipment Needed/Recommended for X-Ray Tube Focal Spot
Measurements
1. Slit assembly, Pinhole, or Star Pattern.
2. A Focal Spot Test Stand (See Figure 2-1), with small and large adapter rings, and fluorescent
screen.
3. Focal Spot Test Stand Alignment Device (Figure 2-2).
4. 8" X 10" (20 x 25 cm) screen-film extremity or mammography cassette and film, or direct-exposure
x-ray film.
5. Clear plastic metric ruler.
6. Spirit level.
7. 6X magnifier with graticule scale in 0.1 mm divisions.
Figure 2-1. Multipurpose Focal Spot Test Stand (Model 07-622)