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The general guidelines regarding qualifications and allocation of responsibilities

given in chapter Organization and Resources on page 50 apply.

The training of operators shall emphasize:

? The safety functions implemented in the SIS

? The hazards the SIS is protecting against

? Routines and procedures for operation of bypass switches

? Routines and procedures for operation of manual shutdown/activation switches

? Procedures for action upon SIS diagnostic alarms

The training of maintenance personnel shall be adapted to the level of maintenance

they will perform. Routine testing of field devices requires different skills than

faultfinding and module replacement in the SIS.

Proof Testing and Inspection

In most system configurations there will be some elements of the SIF that will not

be covered by the system’s automatic diagnostic functions (e.g. sensors, actuators

and field wiring). To avoid fault accumulation within those elements, periodic proof

testing of the safety instrumented functions shall be conducted. The proof test

interval shall be calculated using PFD calculations. This will probably result in

different test intervals for different parts of the SIS.

The proof test interval required for the AC 800M HI is:

? 8 years for central processing unit (PM865 and SM810/SM811)

? 8 years for I/O system and other peripherals

These test intervals are used in 800xA - Safety, Reliability and Availability Data,

3BSE034876* page 381

.

The safety instrumented system (including field devices) shall be visually inspected

at regular intervals, to detect any observable damages.

Records and procedures for handling findings from both proof testing and

inspections shall be created.