scope:

This work instruction applies to all staff engaged in the maintenance of processor controlled concentrators. These concentrators may be made up from a number of remote shelves. These are considered as separate concentrators for the purposes of these requirements.

Purpose

This work instruction directs the maintainer to the requirements for the maintenance of processor controlled concentrators in use within Network Rail. It helps to maintain the required availability and manage the asset life efficiently; this mitigates the risk of loss of or miscommunication at level crossings.