Tham khảo tài liệu 'instrumentation symbols and identification part 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 1 Purpose The purpose of this standard is to establish a uniform means of designating instruments and instrumentation systems used for measurement and control. To this end a designation system that includes symbols and an identification code is presented. 2 Scope General The procedural needs of various users are different. The standard recognizes these needs when they are consistent with the objectives of the standard by providing alternative symbolism methods. A number of examples are provided for adding information or simplifying the symbolism as desired. Process equipment symbols are not part of this standard but are included only to illustrate applications of instrumentation symbols. Application to industries The standard is suitable for use in the chemical petroleum power generation air conditioning metal refining and numerous other process industries. Certain fields such as astronomy navigation and medicine use very specialized instruments that are different from the conventional industrial process instruments. No specific effort was made to have the standard meet the requirements of those fields. However it is expected that the standard will be flexible enough to meet many of the needs of special fields. Application to work activities The standard is suitable for use whenever any reference to an instrument or to a control system function is required for the purposes of symbolization and identification. Such references may be required for the following uses as well as others Design sketches Teaching examples Technical papers literature and discussions Instrumentation system diagrams loop diagrams logic diagrams Functional descriptions Flow diagrams Process Mechanical Engineering Systems Piping Process and Instrumentation Construction drawings Specifications purchase orders manifests and other lists ANSI R 1992
