Fluke Biomedical 57-411 - Manual (Page 7)

General Information
Accessories
1
1-3
1.3 Accessories
Filter Holder & Mounting Plate Assembly
Model 57-426 consists of a transparent filter holder 6 ½” wide x 5 ½” long x 3/8” thick, fastened to 9” x 9”
mounting plates. Thin steel rails on both ends of the holder attract the filter’s magnetic strips. Weighs 18
oz.
Replacement Mounting Plates (2)
Model 57-411 clear plastic, 9” x 9” x 1/16” thick. attached to filter holder with four (4) screws. Can be cut
to fit the collimator’s accessory tray.
1.4 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 four (4) screws) should be cut to fit the rails of the tray (Figure 1-3). 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 (4) small screws holding them
together (Figure 1-2). 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 1-3).
To cut the plastic mounting plate(s), use
a Plexiglas-scoring knife. 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.
To break the plastic, place it 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 1-3).
Figure 1-2.
Screws attach
mounting plates to
filter holder.
Figure 1-3.
Cut mounting plates to size of
accessory tray.
Filter holder, cut to proper fit.
It slides into rails of collimator’s
accessory tray.
Beam exit window.