Fluke Biomedical 57-402 - Manual (Page 11)

Filter Holder Mounting Instructions
Filter Holder Mounting Instructions
3
3-1
Section 3
Filter Holder Mounting Instructions
3.1 Filter Holder Mounting Instructions
If the collimator housing has an accessory tray, the two 9" x 9" X 1/16" acrylic mounting plates (held
together by 4 screws) should be cut to fit the rails of the tray (Figure 3-2). If the tray channel is less than
1/8" wide, only one of the mounting plates is required. The other should be removed and retained as a
spare.
To separate the filter holder from the mounting plate(s), remove the four small screws holding them
together (Figure 3-1). Carefully measure the collimator's accessory tray and mark one or both of the
mounting plates for cutting. A cardboard template is recommended as a cutting guide. Make a trial fitting
with the template before cutting the plastic to ensure that the filter holder will be in the proper position on
the mounting plate. If the final shape of the mounting plate is not square, be sure to check for proper
longitudinal orientation of the filter holder (Figure 3-2).
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 that 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.
Re-attach the filter holder to the mounting plate(s), and insert the assembly into the collimator's accessory
tray (Figure 3-2). If your collimator does not have an accessory tray, the filter holder may be mounted with
self-stick Velcro-type material. This attachment kit (Model 57-426-1100) is available from Fluke
Biomedical.
If the steel rails on the filter holder intrude into the x-ray field of view, unscrew the rails and turn them
around (Figure 3-3). Since the screw holes in these rails are off center, turning the rails will set them 3/4"
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.