GB14249.1-1993

Safety requirements for electronic weighing instruments

电子衡器安全要求

GB 14249.1-1993 — действующий обязательный национальный стандарт Китая: Safety requirements for electronic weighing instruments. Отрасль: Электроника. Тема: Безопасность продукции. Дата вступления в силу: 1 нояб. 1993 г..

Применимость зависит от продукции, схемы сертификации, уведомлений компетентных органов и переходных правил. Закажите перевод или проверьте источник, прежде чем использовать эту запись в решениях по соответствию.

Обзор требований

Этот обзор пока доступен только на английском языке.

Область применения

This standard is applicable to electronic weighing instruments that rely on structural grounding for electric shock protection, including Class I instruments. It also specifically covers instruments intended for use in harsh environmental conditions, such as explosion-proof environments. It serves as a mandatory safety benchmark for manufacturers targeting the Chinese market.

Технические требования

The standard outlines comprehensive safety requirements across several critical categories. Firstly, it defines rated operating conditions and fault conditions, specifying safe operating temperature and humidity ranges for components like load cells and displays. Manufacturers must ensure safe operation within these predefined environmental limits. Secondly, the standard mandates strict anti-electric shock measures. It requires that accessible parts must not be live, and specifies a maximum resistance of 0.5Ω between accessible conductive parts and the safety grounding terminal. All exposed conductive components must be reliably connected to a dedicated safety ground. Thirdly, it sets forth insulation and thermal safety requirements. Components must not reach temperatures that could cause injury or degrade electrical insulation under both normal and fault conditions. The standard also specifies dielectric strength and leakage current limits to ensure operational safety. Finally, it includes requirements for mechanical structure and explosion-proofing. Instruments used in explosive atmospheres must comply with the relevant GB 3836 series standards. Mechanical design must minimize injury risks from sharp edges, and components like sensors must withstand specified vibration and shock tests.

Методы испытаний

The standard details several testing procedures to verify compliance. Key tests include the temperature rise test under rated and fault conditions, and the grounding resistance test, which measures voltage drop under a 10A current to verify the 0.5Ω limit. It also mandates dielectric strength tests (e.g., applying 1500V AC for 1 minute) and damp heat treatment tests to evaluate insulation resistance and leakage currents. Furthermore, mechanical integrity is verified through vibration and shock tests referenced from standards like GB 6587.4 and GB 6587.5.

Частые вопросы

What products are regulated under GB 14249.1-1993?

The standard applies to electronic weighing instruments that use grounding for anti-electric shock protection, including Class I instruments and those used in harsh environments (explosion-proof).

Does GB 14249.1-1993 reference other standards?

It references several national standards for its technical and testing requirements, notably GB 8898 for general safety, GB 3836 for explosion-proof equipment, and GB 7551 for load cells.

What are the specific requirements for explosion-proof electronic weighing instruments?

Explosion-proof models must be manufactured according to GB 3836 and relevant national safety regulations, and must pass testing by a national explosion-proof safety supervision station approved by the Ministry of Labor.

The summary above provides a high-level overview of GB 14249.1-1993. To ensure complete compliance for your electronic weighing instruments entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 14249.1-1993 today to access all detailed parameters, tables, and testing procedures.

Подсказки по применимости

Тип: Безопасность
CCS: N13
ICS: 17.100
Компетентное ведомство: Ministry of Industry and Information Technology
Технический комитет: Ministry of Industry and Information Technology

Связи

Заменён на:GB 14249-2026 (Вступает в силу)