SIGMA projetor - Manual (Page 37)

MAINTENANCE INSTRUCTIONS
4.6
The analysis performed on the wipe test must be capable of detecting the presence of 0.005 µCi (185 Bq)
of radioactive material on the test sample. If the test sample reveals 185 Bq (0.005 µCi ) or more of
removable DU contamination, the exposure device must be removed from service until an evaluation of
the wear on the ‘S’ tube has been made. Should the evaluation reveal that the source tube is worn
through, the exposure device may not be used again.
DU shielded devices do not have to be tested for DU contamination while in storage and not in use.
Before using or transferring a device that has been in storage for more than 12 months, the exposure
device must be leak tested for DU contamination prior to use or transfer. Please contact a QSA Global,
Inc. service center if you require leak test kits, radio-assay services or assistance in the disposal of worn
through exposure devices.
Annual Maintenance for the Model 880 Series Exposure Devices
Tools required for complete maintenance
• 5/32 in Allen wrench for the 10-32 socket head lock and selector-ring screws.
• 3/32 in Allen wrench for the lock’s socket head screw.
• Number 30 Drill bit and pop-rivet gun for removal and installation of 1/8 in s/s rivets.
• Tamperproof tool bit for locking mechanism plate screws.
• Calibrated torque wrench (in/lb) for locking mechanism’s socket head screws.
• Small slot screwdriver for source identification tag 6-32 screws.
• U-tool (part # SK1761) for functional checks of lock mechanism.
• Model A424-9XL mock source assembly and short length control cable for lock mechanism
operational tests after servicing.
Materials required for Model 880 Series complete maintenance:
• Mil-spec grease MIL-G-23827B (or C), MIL-PRF-23827C, (or equivalent radiation resistant grease
authorized by QSA Global, Inc.).
• Temporary Lock-tite™ or Vibra-tite™ thread sealant .
• Recommended solvents for cleaning and degreasing operations: clean mineral spirits (Follow
manufacturer’s safety precautions for use, handling, storage and disposal).
• Clean lint-free rags.
• 12-gauge gun patches or any lint-free cloth for cleaning the ‘S’ tube.
• Large pan for use in cleaning and degreasing the remote drive cable and mechanical parts.
• Stainless steel, brass or synthetic bristle brush to be used during degreasing and cleaning of parts.
• Light viscosity oil, such as 3-in-1™ oil to lubricate plunger lock.
• Model 880 label if required and (4) each 1/8 in stainless steel rivets.
• Lock mount rubber sleeves (4) each.
• Permatex TM anti-seize thread lubricant.
• Replacement springs for the locking mechanism –
1 x compression spring part number SPR006
1 x compression spring part number SPR005
2 x compression spring part number SPR004
• Replacement springs for the outlet port – 2 x compression spring part number SPR033.
• Bayonet-type source guide tube for operational tests of the outlet port.