Operation And Maintenance; Repair And Replacement; Status Of The Document - Emerson Fisher 1052 Safety Manual

Instruction Manual Supplement
D103790X012

Operation and Maintenance

Suggested Proof Test
The objective of proof testing is to detect failures within a 1052 actuator that are not detected by any automatic
diagnostics of the system. Of main concern are undetected failures that prevent the Safety Instrumented Function
from performing its intended function.
The frequency of proof testing, or the proof test interval, is to be determined in reliability calculations for the Safety
Instrumented Functions for which a 1052 actuator is applied. The proof tests must be performed more frequently than
or as frequently as specified in the calculation in order to maintain the required Safety Integrity of the Safety
Instrumented Function.
The proof test shown in table 1 is recommended. The results of the proof test should be recorded and any failures that
are detected and that compromise functional safety should be reported to Emerson. The suggested proof test consists
of a full stroke of the 1052 actuator.
The person(s) performing the proof test of a 1052 actuator should be trained in SIS operations, including bypass
procedures, valve maintenance and company Management of Change procedures. No special tools are required.
Table 1. Recommended Full Stroke Proof Test
Step
1 Bypass the safety function and take appropriate action to avoid a false trip.
2 Interrupt or change the signal/supply to the 1052 actuator to force the actuator and valve to perform a full stroke
to the Fail­Safe state and confirm that the Safe State was achieved and within the correct time.
3 Restore the supply/signal to the 1052 actuator and confirm that the normal operating state was achieved.
4 Inspect the 1052 actuator and the other final control element components for any leaks, visible damage or contamination.
5 Record the test results and any failures in your company's SIF inspection database.
6 Remove the bypass and restore normal operation.

Repair and replacement

Repair procedures in the 1052 actuator instruction manual must be followed.
Manufacturer Notification
Any failures that are detected and that compromise functional safety should be reported to Emerson. Please contact
your Emerson sales office

Status of the Document

Releases
Version History:
or Local Business Partner.
(Version, Status, Date)
Action
1052 Actuator
October 2017
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