54
Safety Manual
00809-0200-5100, Rev GB
Proof Test
February 2017
Proof Test
5.2 System test
This proof test will detect approximately 99% of the DU (dangerous undetected) failures not
detected by the diagnostics in the Rosemount Tank Gauging Safety System. The test includes
testing the relay response when the product surface reaches the relay set point.
The overfill and dry-run protection function should be checked by filling and emptying the tank
in order to test the system response when the product surface reaches the relay set points.
In case it is a dual channel system (1oo2D
(1)
) complying with SIL 3, verify that both level gauges
trigger the alarm.
(1) See “Functional specification of the safety function” on page 8.
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