3 Proof tests
Topics covered in this chapter:
•
Proof test requirement
•
Repair and replacement
•
Notification of failures
•
Proof test interval
•
Tools required
•
Proof test options
•
Partial proof test
•
Comprehensive proof test
•
SIS example
3.1 Proof test requirement
During operation, a low-demand mode SIF must be proof tested. The objective of proof
testing is to detect failures within the equipment in the SIF that are not detected by any
automatic diagnostics of the system. Undetected failures that prevent the SIF from
performing its function are the main concern.
Periodic proof tests shall take place at the frequency (or interval) defined by the SIL
verification calculation. The proof-tests must be performed more frequently than or as
frequently as specified in the SIL verification calculation in order to maintain the required
safety integrity of the overall SIF.
Results from periodic proof tests shall be recorded and periodically reviewed.
3.2
Repair and replacement
Repair procedures in the product reference manual must be followed.
3.3
Notification of failures
In case of malfunction of the system or SIF, the Rosemount 8800D Series SIL 2/3 Capable
Vortex Flowmeter shall be put out of operation and the process shall be kept in a safe state
by other measures.
Emerson must be informed when the Rosemount 8800D Series SIL 2/3 Capable Vortex
Flowmeter is required to be replaced due to failure. The occurred failure shall be
documented and reported to Emerson using the contact details on the back page of this
functional safety manual. This is an important part of Emerson SIS management process.
Proof tests
Safety Manual 15
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