GB14249.1-1993

Safety requirements for electronic weighing instruments

电子衡器安全要求

GB 14249.1-1993 は現行の中国強制国家規格です：Safety requirements for electronic weighing instruments。業界：電子。テーマ：製品安全。施行日：1993年11月1日。

適用可否は製品範囲、認証ルート、所管当局の通知、移行規定によって異なります。コンプライアンス判断に使う前に、翻訳をご依頼いただくか公式情報源をご確認ください。

コンプライアンス概要

この概要は現在英語のみで提供しています。

適用範囲

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.

技術要求

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.

試験方法

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.

よくある質問

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.

適用のヒント

種別: 安全
CCS: N13
ICS: 17.100
所管部門: Ministry of Industry and Information Technology
技術委員会: Ministry of Industry and Information Technology