Fluke Biomedical 57-441 - Manual (Page 8)

Nuclear Associates 57-441
Operators Manual
2-2
Figure 2-2. Filter Holder to Mounting Plate
To cut the plastic mounting plate(s), use a plastic scoring knife. Cut each plate separately. Score the
plastic at the desired locations, making sure each score runs the full length (width) of the plate. Make the
scores deep by going over each scratch several times.
Next, place the scored plate over the edge of a table, with the score mark on top and exactly above the
edge. Hold the plastic sheet flat to the table top with one hand. With the other hand, bend the
overhanging part of the plastic sheet down. If the score mark lines up exactly at the table edge, the
overhanging piece will break cleanly at the mark.
Check that the mounting plate slides easily into the accessory tray. To make any fine adjustments
needed for a proper fit, use a file or fine sandpaper.
Reattach the filter holder to the mounting plate(s), and insert the assembly into the collimator’s accessory
tray (Figure 2-1).
Figure 2-3. Reversing the Guide Rails
If the steel rails on the filter holder intrude into the x-ray field of view, unscrew the rails and turn them
around (Figure 2-3). Since the screw holes in these rails are off center, turning the rails will set them ¾”
further apart.
If desired, the magnetic tape on some or all of the filters can be cut to match the new position of the
holder rails. Using a sharp knife, cut through the magnetic tape (on each side of the filter) in a line parallel
to, and 3/8" from the inner edge. Remove this 3/8" strip, leaving a 5/8" tape strip along the outer edge of
the filter, which matches the new position of the filter holder rails.
The use of the filters and holder is not changed by the above procedure.
Screws Attach
Mounting Plates
to Filter Holder
Turning the Steel
Rails Increases
Spacing Between
Them