SIGMA projetor - Manual (Page 35)

MAINTENANCE INSTRUCTIONS
4.4
Routine (Quarterly) Maintenance Records
Records of all equipment inspected and maintained during the routine maintenance must be recorded.
Records should indicate:
• The date of inspection and maintenance.
• Name and signature of the qualified individual performing the required inspections.
• Problems found and maintenance or repairs performed.
• Model number and serial number of the exposure device and transport container.
• Associated equipment that was inspected and maintained.
• Part numbers and associated lot numbers or serial numbers of replacement parts installed.
Annual Maintenance Requirements
Radiographic exposure devices used under normal environmental conditions should only require
complete maintenance once a year. Complete maintenance on the associated equipment including the
remote controls and source guide tubes should be performed every three months to detect deficiencies
and to prevent corrosion and wear related problems.
The complete maintenance of the exposure device requires the disassembly of the exposure device to
enable a detailed inspection of all major components. Therefore, the inspection and maintenance requires
transfer of the source assembly from the exposure device into a source changer performed inside of a
restricted area. The annual inspection and maintenance must be performed by individuals specifically
trained, qualified and authorized for this work.
Perform the following steps to transfer the sealed source from the exposure device into a source changer:
1 Perform a survey of the exposure device to ensure measurable dose rates are less than
2 mSv/hr (200 mR/hr) and less than 20 µSv/hr (2 mR/hr) at 1 meter (to comply with ANSI/ISO
requirements) when loaded to maximum capacity. Perform a radiation survey and an inspection of the
source changer to be used according to the source changer's operating instructions manual.
2
Perform a daily inspection of the remote controls, source guide tube and exposure device according
to the daily inspection section of this manual. If the source assembly connector fails the NO GO
gauge test, do not proceed with transfer of the source assembly. Contact a QSA Global, Inc. service
center for advice on disposition of the source assembly.
Use the Model 550 NO GO gauge to check the remote control cable connector before and after a
connection to the source assembly connector. For complete instructions to use the NO GO gauge
and points tested (review the daily inspection instructions).
Do not use remote controls that do not meet the inspection criteria described in the daily inspection.
3 Set up the equipment within a restricted area before transferring the source assembly into the source
changer according to the instructions supplied with the source changer. The transfer must be
performed by properly trained and licensed personnel. Use a survey meter to perform confirmatory
surveys of the exposure device, source guide tube and source changer to confirm that the sealed
source is properly secured. Engage the lock on the source changer to lock the sealed source within
the source changer.
Remove the source identification tag from the exposure device and fasten it to the source changer.
Attach a Model 550 connector gauge (jumper) to the end of the remote control cable connector found
inside of the protective cover of the locking mechanism. The jumper will allow removal of the remote
controls from the locking mechanism of the device after the remote control cable connector is
returned to the exposure device lock.