氣體密閉采樣器的操作規(guī)程
1)取樣前,確保各閥門處于關(guān)閉狀態(tài),裝上采樣鋼瓶;
2)依次打開介質(zhì)的進(jìn)口閥、采樣鋼瓶?jī)啥碎y門及出口閥,令樣品流經(jīng)采樣鋼瓶在系統(tǒng)循環(huán)兩分鐘,以確保樣品純凈;
3)采樣:關(guān)閉采樣鋼瓶上端閥門,待壓力表讀數(shù)穩(wěn)定后關(guān)閉采樣鋼瓶下端閥門,關(guān)閉介質(zhì)進(jìn)口閥門,完成采樣;
4)泄壓:依次打開介質(zhì)出口閥門、泄壓閥門,將系統(tǒng)內(nèi)壓力泄掉后關(guān)閉泄壓閥和出口閥;
5)拔下采樣鋼瓶?jī)啥丝焖俳宇^,卸下采樣鋼瓶。
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