国产偷v国产偷v亚洲张丽_五月亚洲丁香_a免费在线观看_欧美日本成人_丝袜中出制服人妻美腿_婷婷好紧好多水国产好硬_九九热精品在线播放_97超级在线人妻资讯_日韩精品视频观看_中文字幕无码笫一页

Standard requirements for obtaining intrinsic safety explosion-proof certification for methane monitoring devices

1、 Certification standards:

1. GB/T 3836.1-2021 Explosive Atmospheres Part 1: General Requirements for Equipment

2. GB/T 3836.4-2021 Explosive Atmospheres Part 4_ Equipment protected by intrinsic safety type "i"

2、 List of certification materials:

1. Technical drawings: schematic, structural, PCB, intrinsic safety parameters, etc

2. Battery specification sheet

3. SRRC certificate or wireless transmission power report of wireless transmission module

4. Product manual, enterprise standards, etc

3、 Explosion proof sign: Ex ib Ⅱ B T4 Gb