The General Administration of Market Supervision issued 24 national metrological technical specifications.

　　According to the website of the General Administration of Market Supervision, recently, the General Administration of Market Supervision issued Announcement No.32 in 2022, approving the promulgation and implementation of 24 national metrology technical specifications such as Verification Regulation of Liquid Piston Pressure Gauges.　

　　In the field of radio metrology, JJF 1286— 2022 "Calibration Specification for Wireless Channel Simulator" focuses on revising the calibration methods of path delay and path loss, increasing the calibration of maximum Doppler frequency shift, and providing technical basis for the calibration of wireless channel simulators in aerospace and aviation industries. Revised and released JJF 1982— 2022 《 Level Oscillator Calibration Specification 》, the upper frequency limit of test signal is extended to 150MHz, and the output impedance is also extended. In the calibration method, both the new digital indicating level oscillator and the traditional pointer level oscillator are taken into account. Revised and released JJF 1238— In 2022, in order to adapt to the changes of relevant international test standards, the calibration of discharge waveform of machine model and latch model was added, and the calibration method of integrated circuit electrostatic discharge test equipment was improved. Formulate and issue JJF 1983— 2022 "Calibration Specification for High-definition Video Signal Analyzer", the high-definition video signal analyzer is a special test instrument for standard compliance test and conformity inspection of high-definition video equipment and video terminal equipment, which is widely used by high-definition video equipment manufacturers and quality inspection institutions. The formulation and release of this specification provides metrological technical support for the development of high-definition video industry.　

　　In the field of pressure measurement, JJG 59— 2022 Verification Regulation of Liquid Piston Pressure Gauge redefines the measurement range and accuracy grade, puts forward the verification requirements of pressure deformation coefficient, clarifies the actual measurement of gravity acceleration, and improves the verification methods and technical indicators. Revised and released JJG 241— 2022 Verification Regulation of Precision Cup-shaped and U-shaped Liquid Pressure Gauges, which is widely used in precision machining, pressure (leakage rate) measurement in aerospace industry, leakage research and other fields, this revision has improved the technical index requirements of some standards used in accuracy grade verification. Formulate and issue JJF 1986— 2022 "Calibration Specification for Differential Pressure Air-tight Leak Detector" clearly stipulates the calibration items, calibration methods and standard selection of this kind of instrument. The calibration items cover the main measurement performance, and the calibration methods are close to the actual working state of the instrument. Formulate and issue JJF 1987— 2022 "Calibration Specification for Air Data Testers" changes the current situation that there is no calibration specification for this type of instruments in China, improves the measurement ability of flight parameters of aviation aircraft, reduces the probability of aviation accident symptoms, improves the dispatch rate and attendance rate of airlines, and serves to ensure the civil aviation transportation industry.　

　　In the field of temperature measurement, JJF 1991— 2022 Calibration Specification for Short Low-cost Metal Thermocouples, which are widely used in aerospace, petrochemical and other fields, are commonly used temperature sensors. The specification mainly includes measurement characteristics, calibration conditions, calibration items, calibration methods and examples of measurement uncertainty evaluation, which provides technical basis for the calibration of short-type cheap metal thermocouples.　

　　In the field of optical metrology, JJF 1988— 2022 Calibration Specification for Communication Signal Analyzer, which is used to test the performance indexes of optical transmitter and pluggable optical transceiver module in optical communication system. The formulation and publication of this specification create favorable conditions for effectively carrying out the traceability of values. Formulate and issue JJF 1989— 2022 "Calibration Specification for Spectral Illuminator" clarifies the measurement characteristics, calibration conditions and calibration methods of spectral illuminators, supports the quality inspection of electric light source products, and promotes the high-quality development of electric light source, display and other industries. Formulate and issue JJF 1990— 2022 "Calibration Specification for Integrating Sphere Standard Light Source", integrating sphere standard light source is a common instrument for calibrating spectral radiometers, luminance meters and area array detectors. The formulation and publication of this specification effectively guarantees the accuracy and reliability of spectral radiation, luminosity and chromaticity in related fields.　

　　In the field of electromagnetic metrology, JJG 126— 2022 Verification Regulation of Power Frequency AC Electric Quantity Measuring Transmitter, this revision improves the applicability of the regulation, solves the problem of value transmission of new digital output transmitter, and helps to ensure the safe operation in smart cities, intelligent manufacturing, automatic control and other fields. Revised and released JJG 982— 2022 Verification Regulation of DC Resistance Box, this revision broadens the scope of application, adjusts the annual stability assessment scope, simplifies the verification method of switch variation, highlights the scientificity, rationality and applicability of verification items and methods, and improves the verification efficiency while ensuring the accuracy and reliability of verification conclusions. Formulate and issue JJG 1186— 2022 Verification Regulation of Verification Device of DC Watt-hour Meter, DC Watt-hour Meter Verification Device, as an important testing equipment of DC Watt-hour Meter, is directly related to the accuracy and reliability of DC energy measurement. The formulation and publication of this specification provides a basis for the verification of DC Watt-hour Meter Verification Device and provides technical support for DC energy measurement in electric vehicles, solar power generation and other fields. Formulate and issue JJF 1985— 2022 "Calibration Specification for Welding Power Supply of DC Electric Welding Machine", the welding power supply of DC electric welding machine is a device that provides output characteristics, and the accuracy of its measurement characteristics directly affects the quality of welding products. The formulation and publication of this specification plays a positive role in improving the quality of welding products and ensuring the safety of related personnel and property.　

　　In the field of high voltage measurement, JJF 1995— 2022 Calibration Specification for Electronic Transformer Calibrator, the electronic transformer calibrator is a special instrument for calibrating electronic transformers, which is widely used by transformer manufacturers and power grid construction units. The formulation and publication of this specification has solved the long-standing problem of the lack of unified traceability method for digital values of electronic transformers, further supported the inspection and testing of electronic transformer products, and provided measurement guarantee for the construction of new power systems.　

　　In the field of time and frequency measurement, JJG 601— 2022 "Verification Regulation of Time Verification Instrument", time verification instrument is a multifunctional and comprehensive time verification equipment. This revision provides a more scientific and reasonable technical basis, thus ensuring the accuracy and reliability of time-frequency working measuring instruments. Revised and released JJF 1984— 2022 "Calibration Specification for Quartz Crystal Oscillators in Electronic Measuring Instruments", quartz crystal oscillators are generally used as the frequency source for generating signals in electronic measuring instruments. This revision proposes calibration methods for measuring characteristics such as relative frequency deviation and frequency stability, which provides scientific and standardized test basis for quartz crystal oscillators in electronic measuring instruments and ensures accurate and reliable transmission of frequency values.　

　　In the field of meteorological metrology, JJF 1992— 2022 "Calibration Specification for Long-wave Radiation Meter" calibrates the measurement characteristics such as the sensitivity of analog output long-wave radiation meter and the correction coefficient of digital output long-wave radiation meter, thus effectively ensuring the accurate measurement of long-wave radiation and net total radiation. The formulation and publication of this specification provides a scientific and unified basis for the traceability and performance evaluation of long-wave radiation meters.　

　　In the field of energy measurement, JJF 1993— 2022 Technical Specification for Energy Measurement of Natural Gas, energy measurement is the main way of international natural gas trade handover, which is fully integrated with national standards. According to three different ways of calorific value determination (online determination, offline determination and assignment), the uncertainty calculation method of natural gas energy is given. This specification can be used as the basis for the evaluation and acceptance of natural gas energy metering system by metering technology institutions and the supervision and inspection by government departments, and can also be used as a reference for energy metering management of users such as oil and gas companies.　

　　In the field of energy efficiency measurement, JJF 1994— 2022 Calibration Specification for Energy Efficiency (Performance) Measuring Devices of Refrigerators, JJF 1261.27— 2022 Rules for Measuring and Testing Projector Energy Efficiency, revised and released JJF 1261.6— 2022 Rules for Measuring and Testing Energy Efficiency of Computer Monitors. The energy efficiency (performance) measuring device for refrigerators is the main measuring equipment for refrigerator performance parameters. The formulation and publication of this specification will accelerate the realization of accurate and consistent measurement data between testing institutions and production enterprises, and play a positive role in standardizing the labeling of energy efficiency labels for refrigerator products and even the development of refrigerator industry. Projectors and computer monitors are widely used as office and learning equipment, which is of great significance for energy saving. This revision includes the measurement requirements, testing conditions, testing items and methods, testing results evaluation criteria, testing reports and other contents of energy efficiency of related products. While guiding consumers to buy energy-efficient products, it encourages manufacturers to increase research and development efforts and enhance consumers’ experience.　

　　The above 24 national metrology technical specifications were formally implemented on March 26th, 2023.