1747-L551
1747-L551
熱偶式規(guī)管由加熱絲與用來測量加熱絲溫度的熱電偶兩部分構(gòu)成。熱電偶的一端(即熱端)與加熱絲相連,另一端作為冷端引出管外,通過管座接至測量熱偶電勢的毫伏計。
工作時,將與被測真空系統(tǒng)相接的熱偶式規(guī)管的加熱絲通以一定的加熱電流,在低真空狀態(tài)下,熱電偶產(chǎn)生的熱電勢決定于周圍氣體的壓強,這是因為加熱絲溫度的變化取決于氣體分子的熱傳導,當壓強降低時,氣體傳走的熱量減少,加熱絲的溫度隨之升高,于是熱電勢增大,情況相反時,則熱電勢減小。圖3-4為熱偶電勢隨壓強變化的實驗曲線。
& 公司全稱 : 廈門泰尼電氣有限公司
& 銷售代表 : 小黃
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& 公司地址 : 廈門市海滄區(qū)海滄街道濱湖一里7號
& 公司 : www.xmtaini。。com
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