Discussion on Content Optimization of JJG 1204-2025 Verification Regulation for Electronic Price Computing Scales (Trial
2026-10-22
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Electronic price computing scales are widely used in trade settlement scenarios such as farmers’ markets, shopping malls, supermarkets and mobile vendors. They are closely related to people’s daily life and rank among the most widely used electronic weighing instruments in China. In recent years, cheating on electronic price computing scales and short-weight problems have occurred repeatedly. Such issues seriously infringe upon the legitimate rights and interests of consumers and undermine the order of fair market competition.
On January 8, 2025, the State Administration for Market Regulation issued JJG 1204-2025 Verification Regulation for Electronic Price Computing Scales (Trial). It is a dedicated technical specification specially formulated for electronic price computing scales. Based on the formulation background of this regulation, this paper systematically elaborates on its optimized contents from two aspects: general technical requirements and verification methods.
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Discussion on Content Optimization of JJG 1204-2025 Verification Regulation for Electronic Price Computing Scales (Trial
2026-10-22
.gtr-container-x7k2m {
font-family: Verdana, Helvetica, "Times New Roman", Arial, sans-serif;
font-size: 14px;
line-height: 1.6;
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padding: 20px;
box-sizing: border-box;
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Electronic price computing scales are widely used in trade settlement scenarios such as farmers’ markets, shopping malls, supermarkets and mobile vendors. They are closely related to people’s daily life and rank among the most widely used electronic weighing instruments in China. In recent years, cheating on electronic price computing scales and short-weight problems have occurred repeatedly. Such issues seriously infringe upon the legitimate rights and interests of consumers and undermine the order of fair market competition.
On January 8, 2025, the State Administration for Market Regulation issued JJG 1204-2025 Verification Regulation for Electronic Price Computing Scales (Trial). It is a dedicated technical specification specially formulated for electronic price computing scales. Based on the formulation background of this regulation, this paper systematically elaborates on its optimized contents from two aspects: general technical requirements and verification methods.
View More
Specification for Test of Cheating Feature Identification of Electronic Price Computing Scales Officially Released
2026-10-19
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Recently, the State Administration for Market Regulation has issued the first national metrological test technical specification in the field of cheating feature identification, Specification for Test of Cheating Feature Identification of Electronic Price Computing Scales (hereinafter referred to as the Specification), which shall come into force on January 1, 2027.
As widely used weighing instruments, electronic price computing scales are prevalent in farmers’ markets, supermarkets, mobile stalls and other scenarios. Up to now, there are 4.33 million electronic price computing scales nationwide. The metrological accuracy of electronic price computing scales serves as the foundation and core for fair and precise weighing and pricing, directly bearing on the public’s "vegetable baskets" and "purses".
The Specification incorporates systematic testing for cheating feature identification into the national metrological technical specification system, offering solid technical support for cheating behavior screening and metrological supervision and law enforcement. It features three major highlights:
It innovatively adopts a negative list judgment model. From the two dimensions of weighing and price calculation, the Specification carries out identification tests and comprehensive assessment on cheating features (deceptive usage characteristics) of electronic price computing scales, clearly defining rigid benchmarks for supervision and law enforcement included in the negative issue list.
It covers common forms of cheating. The Specification classifies cheating of electronic price computing scales into two categories: software tampering and hardware modification. Combined with practical experience in metrological verification, while focusing on inspecting the weighing issue of "giving short weight", it also prioritizes the test of abnormal price calculation. It basically covers various common cheating methods in the market, further tightening the supervision network for people’s livelihood metrology.
It specifies and clarifies the complete practical test procedures. The Specification clarifies the whole process of cheating feature detection and testing. Cheating behaviors are identified by trying various possible key combination adjustments and simulating external remote control devices. Together with weight loading and price verification, it checks whether the weighing and price indication values are accurate. It identifies cheating features of electronic price computing scales across the whole chain, all links and all elements, consolidating the technical foundation for people’s livelihood metrological supervision.
Moving forward, the State Administration for Market Regulation will continue to deepen comprehensive governance in the field of people’s livelihood metrology. It will safeguard the public’s "vegetable baskets" and "purses" through targeted and efficient metrological supervision, so that residents can shop and weigh goods with full confidence.
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Verification of Electromagnetic Shielding Scheme for Physical Force-Measuring Weighing Instruments in Strong Electromagn
2026-10-14
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Case Background
A steel smelting plant requires the upgrading of its furnace hopper weighing device to improve weighing accuracy under high-temperature, strong magnetic and high-electromagnetic conditions. The hopper is located adjacent to high-voltage power distribution cabinets, with several 10 kW variable-frequency water pumps, electric welding machines and other equipment in the vicinity. The maximum magnetic field strength is approximately 60 A/m; radio frequency signals mainly range from 10 MHz to 50 MHz, and the instantaneous peak voltage of the power supply can reach up to 1500 V. The currently deployed equipment is a mechanical lever electronic scale, which exhibits a zero offset of 1.8% and full-scale deviation of 2.3% at this site, failing to meet the industrial requirement (≤1%). Considering the characteristics of this environment, an integrated electromagnetic protection scheme combining multi-layer shielding and signal line filtering is proposed. Virtual laboratory tests and on-site experiments will be adopted to verify the effectiveness of the system, providing references for the reliability operation of weighing instruments under strong electromagnetic environments.
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Causes of Errors in High-Precision Weighing Instruments and Uncertainty Control Methods
2026-10-13
Measurement errors of high-precision weighing instruments are comprehensively affected by multiple factors including sensor nonlinearity, non-uniform mechanical structure and external environmental disturbances, and there are significant interactions among these error sources. Test data show that when the three factors act simultaneously, the peak total system error reaches 0.21% F.S., which is approximately 24% higher than the 0.17% F.S. predicted by linear superposition of single factors. This conclusion is derived from statistical analysis of controlled experimental data under multiple working conditions and repeated measurements, featuring good representativeness and repeatability. The combined uncertainty model established based on the GUM framework realizes unified quantification of each error component. After adopting systematic hierarchical control technology, the expanded uncertainty of measurement results is reduced from 0.116% F.S. to 0.034% F.S., which fully verifies the value of this technology in engineering applications. Future research can focus on the uncertainty propagation mechanism during dynamic weighing.
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