Sentinel Sentry 110 & Sentry 330 Safety Class A Components - QSA Global SENTINEL SENTRY 330 Manual

The test should only be performed by personnel that are formally trained, authorized and thoroughly
familiar with annual maintenance procedures. This test is performed by engaging the remote control
connecting plug assembly into the gamma-ray source projector's locking mechanism WITHOUT first
engaging the control cable connector within the source assembly connector.
The ability to then rotate the locking mechanism from the CONNECT position towards the LOCK position
indicates critical dimensions of the locking system are excessively worn to an unsafe condition. Extreme
care should be exercised to prevent rotating the locking mechanism's selector ring beyond the
LOCK position. If the locking mechanism and remote controls fail a misconnect test the equipment must
be removed from radiographic operations. The equipment must not be used until repairs are performed
and misconnect test results are satisfactory.
During the performance of the misconnect test there is a risk of losing control of the radioactive
source assembly if:

the components are excessively worn or damaged

the person performing the test intentionally or inadvertently rotates the selector ring from the
CONNECT position to the OPERATE position

the person performing the test intentionally or inadvertently pushes the lock slide into the EXPOSURE
mode.
Contact a QSA Global, Inc. service center if you have questions regarding the misconnect test.
4.6.5 Annual Maintenance Records
Records of all equipment inspected and maintained during the annual maintenance must be recorded.
Records should indicate:

The date of the inspection and maintenance.

The name of the qualified individual performing the required inspections.

Record problems found and maintenance or repairs performed. Include results of misconnect tests on
all remote controls and gamma-ray source projectors by manufacturer, model number and serial
number.

The model number and serial number of the gamma-ray source projector.

The associated equipment including the model number of remote controls (serial number if serialized)
and source guide tubes that were inspected and maintained.

The part numbers and associated lot numbers or serial numbers of replacement parts installed.
These inspection and maintenance records must be retained according to the record keeping
requirements of the applicable regulatory jurisdiction.
4.7 SENTINEL SENTRY 110 & SENTRY 330 Safety Class A
Components
4.7.1 Safety Class A Designation Items
Items that comprise the SENTINEL SENTRY 330 and SENTINEL SENTRY 110 radiographic gamma-ray
source projector and associated equipment that are critical for safe radiological operation are classified as
Class A items or components. Class A items can be structures, components and systems whose failure
or function could directly result in a condition adversely affecting public health and safety. This would
include extreme conditions such as the loss of primary containment with a subsequent release of
radioactive material and or a loss of shielding creating a substantial safety hazard. Replacement parts
QSA Global, Inc.  40 North Avenue Burlington, MA 01803
Operations Manual  MAN-038 March 2019
 888.272.2242  781.272.2000
 Page 68 of 100
 qsa-global.com