2 Proof Test Interval
2 Proof Test Interval
The purpose of a proof test is to return the unit to “as new” in terms of its safety parameters. The proof test interval is 1 year.
According to IEC 61508, users are allowed to extend the proof test inter-val to meet their system needs. Honeywell Analytics allows
such an extension, as long as the user follows the proper calculation method for calculating a proof test interval as defined in IEC
61508 for the desired SIL level.
Note
The proof test interval should not preclude more frequent maintenance of Touchpoint Plus in ac-cordance with the Operating
Instruction (3011M5001) if the site conditions require it�
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