GB/T 20730.1-2006

This standard specifies uniform methods for evaluating the performance of industrial-process control instruments that accept analogue input signals and provide two- or multi-state (e.g., on/off or discrete) output signals. It is applied in manufacturing and process industries, such as chemical plants or refineries, to test and compare the accuracy, response time, and reliability of devices like limit alarms or switching controllers. The standard ensures consistent performance assessment across different manufacturers and models for procurement and quality control purposes.