JJG 2059-2014 "Conductivity Measurement Instrument" applies to the quantity transfer and calibrating of electrolysis solution conductivity Measurement Instrument. This verification system table specifies the method and procedure for transferring conductivity values from the Measurement Reference to the working Measurement Instrument through the metrology standard to ensure the accuracy and Reliability of the transfer process. The standard details the composition and Measurement range of the conductivity Measurement Reference, including Conductivity detector pool, AC Impedance measurement equipment, temperature measurement equipment and thermostatic equipment. The measurement uncertainty of the conductivity Measurement reference is 0.05%~ 0.07% (k = 2), which is suitable for the accurate measurement of electrolysis solution conductivity in laboratories and industries, and can be used as the traceability basis for calibrating work.