✓
With the source rod in the SAFE (shielded) position, place the
gauge on its side.
✓
Clean the heads of the four corner screws that hold the bottom
plate to the gauge base (Figure A–3). Using a Phillips
screwdriver, remove the four screws in the corner of the plate
and remove the plate.
✓
To reduce radiological exposure, stand to one side of the gauge.
Paying close attention to the position of the sliding block,
remove the block.
✓
Using a stiff brush or rag soaked in alcohol, clean the sliding
block and the cavity.
✓
Re-install the sliding block with the angled side up. Apply a
light coating of Magnalube-G paste to the top angled surface of
the sliding block.
✓
Re-install the bottom plate. Do not over-tighten screws!
Ensure that the source rod moves up and down freely.
Figure A–3. Cleaning the Tungsten Sliding Block
GAUGE BASE
CAVITY
SLIDING BLOCK
BOTTOM PLATE
FLAT HD
SCREWS (4)
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