Troxler RoadReader Plus 3450, Manual Of Operation And Instruction

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Model 3450 Appendix A–13
LEAK TESTING
The 3450 gauge contains two radioactive sources that must be
periodically leak tested. The purpose of leak testing is to verify the
integrity of the source encapsulation. Because the source capsules
are not directly accessible to users, the leak test is performed
indirectly by testing gauge components near the capsules for
contamination. Unless specified otherwise by your radioactive
material license, the 3450 gauge must be leak tested at intervals not
exceeding 12 months to verify the integrity of the radioactive
sources contained in the gauge. In the United States, leak tests may
only be performed by an organization licensed to provide leak test
kits to licensees and to analyze leak test samples.
To perform a leak test, use the Troxler Model 3880 Leak Test Kit
(PN 102868) and accompanying instructions to perform the
following procedure:
✓
Write the gauge model and serial number on the wipe disk.
✓
Ensure that the source rod is latched in the SAFE (shielded)
position.
✓
Loosen the four captive screws that secure the control unit, and
remove the control unit from the gauge (Figure A–4).
✓
Look into the interior of the gauge and locate the baseboard
assembly attached to the gauge base. The baseboard assembly
consists of printed circuit (PC) boards in an aluminum housing.
✓
Holding the wipe disk with the tongs, wipe the gauge base and
aluminum housing in front of and behind the baseboard in the
middle of the gauge (approximately halfway between the source
rod and the right hand side of the gauge).
✓
Return the control unit to the gauge and tighten the four captive
screws.
✓
Turn the gauge on its side and locate the opening on the bottom
of the gauge through which the source rod would protrude.
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