On large installations, what is the complete list of installed instruments referred to as?

The complete list of installed instruments in large installations is referred to as the Instrument Index. This term denotes a comprehensive compilation that includes all the instruments utilized within a facility, along with key details such as their locations, specifications, and functional relationships. The Instrument Index serves as an essential reference tool for engineers, technicians, and maintenance personnel, facilitating easy identification and tracking of instruments over the lifespan of the installation.

In large systems, having an organized Instrument Index is critical for managing complex control systems effectively, as it helps streamline operations, maintenance, and troubleshooting processes. This organized list can greatly enhance communication among team members, ensuring that everyone has access to the same important information.

Other options, while they may seem relevant, do not accurately capture the specific function associated with the Instrument Index. For example, an Instrument Plan could refer to a schematic or layout rather than a comprehensive list. A Master List might suggest a summary compiling various documents or data, and an Index Sheet could imply a simpler enumeration rather than the detailed and formal structure of an Index which is necessary for effective instrument management in large installations.