This standard serves as the general guideline for systematically testing and evaluating the performance indicators of conductivity meters (i.e., instruments for measuring the conductivity of electrolyte solutions). The standard specifies the testing procedures and requirements for several key items, including the intrinsic error (i.e., basic error) of the instrument, the temperature compensator error, the conductivity cell constant compensator error, and stability. During the execution of these tests, equipment such as standard resistance boxes, analog devices for measuring temperature (e.g., temperature resistance boxes), and precision constant-temperature water baths are typically used to simulate different conductivity values and environmental conditions, thereby verifying the accuracy of the instrument readings. This method provides a unified technical basis for evaluating the metrological performance of conductivity meters in scenarios such as laboratory and industrial online monitoring.