IC693CPU341  气体温度组别划分：  
温度组别 安全的物体表面温度 常见爆炸性气体 
T1  ≤ 450℃ 氢气、丙烯腈等 46 种 
T2  ≤ 300℃ 乙炔、乙烯等 47 种 
T3  ≤ 200℃ 汽油、丁烯醛等 36 种 
T4  ≤ 135℃ 乙醛、四氟乙烯等 6 种 
T5  ≤ 100℃ 二硫化碳 
T6  ≤ 85℃ 硝酸乙酯和亚硝酸乙酯 
仪表的防爆标志 
  Ex(ia)ⅡC T6 的含义 :  
标志内容 符号 含义 
防爆声明 Ex  符合某种防爆标准，如我国的国家标准 
防爆方式 Ia  采用 ia 级本质安全防爆方法，可安装在 0 区 
气体类别 ⅡC  被允许涉及ⅡC 类爆炸性气体 
温度组别 T6  仪表表面温度不超过 85℃ 
Ex(ia)ⅡC 的含义  
标志内容 符号 含义 
防爆声明 Ex  符合欧洲防爆标准 
防爆方式 ia  采用 ia 级本质安全防爆方法，可安装在 0 区 
气体类别 ⅡC  被允许涉及ⅡC 类爆炸性气体 
: 注 : 该标志中无温度组别项 , 说明该仪表不与爆炸性气体直接接触 . 

IC693CPU341

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IC693CPU341

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