Discussion on JJF 1139-2026 Principles and Methods for Determining the Verification Interval of Measuring Instruments
2026-11-09
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The issuance and implementation of JJF 1139-2026 Principles and Methods for Determining the Verification Interval of Measuring Instruments marks an important update to China’s system of metrological technical specifications. While reasonably inheriting the content of the previous edition, this revised specification expands the methods for establishing verification intervals, clarifies the fundamental principle centered on measurement reliability, and sets up a systematic framework for method selection.
To put this specification into practice, metrology professionals need to thoroughly comprehend its principles and methodologies. They shall scientifically and rationally determine verification intervals according to the actual conditions of different types of measuring instruments. Only in this way can the fundamental objective — “ensuring accurate and reliable values of measuring instruments and mitigating the risks of out-of-tolerance use” — be truly achieved, thereby providing solid metrological technical support for the high-quality development of China’s economy and society.
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On-site Identification and Prevention of Metering Fraud of Electronic Pricing Scales in Farmer’s Markets
2026-11-09
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At present, the governance of metering fraud involving electronic pricing scales in farmer’s markets is shifting from ex-post investigation and punishment to source prevention and control, technology-enabled oversight and multi-stakeholder co-governance. Since the start of this year, market regulatory authorities have continued to advance the development of metering legal systems and livelihood metering initiatives. The successive implementation of the newly revised verification specifications and regulatory measures has provided clearer grounds for governance. The rollout of smart metering supervision platforms offers technical support for online monitoring and one code per scale.
Looking ahead, regulatory trends will further highlight the rule of law, digitalization and social engagement. On the one hand, regulatory responsibilities of all relevant parties will be enforced through binding laws and regulations; on the other hand, data sharing will improve regulatory precision, while social forces will be widely mobilized to participate in supervision. Frontline regulators should hone their core capabilities of “identification, inspection, prevention and administration", master the essentials for identifying hardware modifications and software tampering, make good use of differentiated management, credit constraints, online monitoring and other tools, and build synergy through public oversight. Only with multi-pronged, persistent efforts can a reliable consumption environment with accurate weighing and full measure be steadily maintained.
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Discussion on the Application Prospect of Electronic Forklift Scales
2026-11-06
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Electronic forklift scales have evolved from an innovative technology into indispensable basic equipment for modern smart logistics and digital factories. Their application prospect lies not only in replacing traditional fixed weighing methods, but also in serving as a data carrier for the Industrial Internet of Things to deeply participate in and empower every link of the supply chain. With the continuous enabling of artificial intelligence, the Internet of Things, cloud computing and other technologies, electronic forklift scales are becoming smarter, more connected and customizable. Their value will extend beyond weighing itself to optimizing overall operations based on weighing data. Enterprises should actively adapt to and embrace this trend, and incorporate intelligent weighing technology into their digital management upgrading initiatives.
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Research on Daily Maintenance and Management of Weighing Instruments in Thermal Power Plants
2026-11-04
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As core measuring instruments throughout the whole production process of thermal power plants, weighing instruments feature metering accuracy and operational stability that directly affect production quality, unit safety and corporate benefits. According to their applications, weighing instruments in thermal power plants fall into two categories: special weighing instruments for boiler maintenance (electronic crane scales and loss-in-weight feeders) and fuel weighing instruments for routine use (belt scales and truck scales). These two categories differ in functions and metering requirements: electronic crane scales and truck scales are subject to mandatory verification, belt scales require calibration, and timing scales are verified or calibrated as needed. Nevertheless, scientific verification/calibration and standardized daily maintenance and management are required for all of them to guarantee metering precision. A comprehensive daily maintenance and management strategy is established from four aspects: routine cleaning and inspection, periodic in-depth maintenance, emergency fault handling and professional personnel management. Proper on-site verification/calibration and standardized daily maintenance and management of weighing instruments can effectively eliminate metering deviations, reduce fault frequency, extend equipment service life and sustain stable operation of weighing instruments. It provides solid support for the accurate routine production and smooth boiler maintenance of thermal power plants, and also offers references for the daily maintenance and management of weighing instruments in similar thermal power plants.
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Analysis on the Construction and Implementation System for New Test Projects of Inspection Bodies
2026-11-04
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Result verification is a key step in the preparation of new projects and serves as critical evidence to demonstrate that a technical laboratory possesses the corresponding testing capability. The preferred verification approach is to participate in externally organized proficiency testing, or conduct inter-laboratory comparisons with laboratories that already hold the relevant testing capability, so as to objectively assess the testing performance and analyze and evaluate the comparison results.
Where the above approaches are not feasible, verification may be carried out through personnel comparison, method comparison, data comparison with authoritative institutions, and other means. Personnel comparison requires no fewer than two trained and qualified personnel to test the same batch of samples in accordance with the same standard, to verify the reproducibility of results; this method is mostly applied to visual inspection items. Method comparison tests the same sample using a validated method and the method for the new project, and the consistency of results is used to determine whether the laboratory is competent to carry out the new test project. For data comparison with authoritative institutions, the deviation of test results can be compared against the root-sum-square of uncertainties to guarantee accurate and reliable results. Detailed records shall be kept throughout the verification process, and a verification report shall be prepared upon completion where necessary.
The development of new test projects at inspection bodies is systematic and comprehensive. The five interlinked elements — personnel, environmental facilities and safety, equipment, documents and records, and result verification — are all indispensable. Adequate preparation for each element ensures smooth application for the new testing capability and successful assessment with high quality.
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