Regional Basic Professional Training Course in Korea

❙ 763 ❙
12. Surveillance Programmes
each safety system, from sensor input to actuated equipment, as is practicable in a single
test. Where the entire system from sensor to actuated equipment cannot be tested as a
whole, verification of system response time is accomplished by measuring the response
times of discrete portions of the system and showing that the result of all response times
is within the limits of the overall system requirements.
Calibration and response time are verified by tests that do not require removal of
detectors from their installed location unless such tests are not capable of detecting
whether response time changes are beyond acceptable limits. In such cases, sensors are
removed for a special bench test if this is practicable. If it is not practicable, then the
manufacturer’s test results may be used, provided that:
Satisfactory assurance is obtained that ageing does not degrade performance
beyond acceptable limits;
The manufacturers’ test results are not invalidated by the design of the system in
which the sensor is installed; and
The test results have been documented and the tests performed in accordance with
the quality assurance requirements of the operating organization’s quality assurance
programme.
12.2.6.4. Functional tests
A functional test ensures that the tested system of component is capable of performing its
design function. To the extent practicable, SS&C are tested under the conditions in which
they are expected to operate to fulfill their intended functions. A functional test of
equipment consists, as appropriate, of one or more of the following:
Manual start of equipment. Test duration should be sufficient to achieve stable
operating conditions. Where starting a specified component is not practical,
operation of the starting device in the ‘test’ position may be acceptable if the