Document No: C-41-02490-9
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8.4 Periodical inspection
Periodical inspection should be performed to ensure the detection capability of the UST. Table 8-4 below
shows an example list of periodical inspection items. It is recommended to perform this inspection in six
months interval. This inspection should be performed together with daily inspection.
Table 8-4 Periodical inspection list
Screw are tightly fastened
No displacement from the original mounting position
No scratch or crack on the optical window
Screws of the optical window are tightly fastened
No oil/grease or dirt on the optical window
No visible damage on the UST
Cable connector is in good condition and tightly fastened
When the test piece is placed in the detection area
Output 1 to 3 switch from ON state to OFF state
When the test piece is removed from the detection area
Output 1 to 3 switch from OFF state to ON state
Area switching is according to input signal
Predetermined system operation is carried out as expected
* Must check items 8 and 9 for all the areas
For the traceability purposes it is recommended to maintain and store the
maintenance and inspection records.