InstroTek
87
Procedure
1.
With the source rod in the “SAFE” position, place
the gauge on its side with the bottom plate to
your right or left. (This positioning will prevent
unnecessary radiation exposure to the operator.)
2.
Examine the bottom plate. Clean the screw
heads if necessary to make removal easier and
to prevent the screw heads from stripping.
3.
Use a Phillips screwdriver to remove the bottom
plate. It is normal to see evidence of wear,
however if deep grooves are present where the
sliding block slides, it may indicate that the plate
needs replacement. There should be a scraper
ring in the bottom plate hole where the source
rod extends; if the ring is worn or missing call
InstroTek for a replacement.
4.
If a large amount of dirt has accumulated in the
cavity above the bottom plate, the scraper ring
has become worn and should the replaced.
Replace the scraper ring by removing the
retaining ring with a small screwdriver. It is
recommended that the scraper ring be
changed at least once a year or more often
depending on the use. The scraper ring can be
pushed out. Clean the entire plate of any debris
and install a new scraper ring and retaining ring.
Add a thin layer of grease where the sliding
block slides.
5.
To remove the sliding tungsten shield, use a
screwdriver to pull the shield out by the spring.
