描述
電阻式遠(yuǎn)傳壓力表是在彈簧管壓力表中裝了一個(gè)可變的滑線電阻(電阻變送器),當(dāng)被測(cè)壓力傳入后,它的指針可以就地指示被測(cè)壓力,同時(shí)帶動(dòng)可變電阻的可動(dòng)觸點(diǎn),把被測(cè)壓力值的變化轉(zhuǎn)變?yōu)殡娮柚档淖兓儆删嚯x較遠(yuǎn)、集中安裝的顯示儀表顯示出來(lái)。YCD-150,YR-150遠(yuǎn)傳壓力表就屬于這類壓力表。
使用電阻式遠(yuǎn)傳壓力表時(shí),要注意以下幾方面問題。
1.可動(dòng)觸點(diǎn)和滑線電阻表面容易污染或腐蝕。如果灰塵進(jìn)入表內(nèi),會(huì)造成觸點(diǎn)氧化或接觸不良,而使接觸電阻增大,影響顯示儀表的正確指示,所以使用時(shí)要防止灰塵進(jìn)入表內(nèi)。同時(shí)還要做好維護(hù)工作,用酒精擦洗電阻絲與觸點(diǎn)。
2.電阻式壓力表是與顯示儀表配套刻度的,因此不能互換使用。如果某一部分損壞需要進(jìn)行更換或改變側(cè)壓范圍時(shí),都要重新校驗(yàn)和劃刻度。
3.電阻變送器與顯示儀表之間用導(dǎo)線連接,連接時(shí)采用三線制。因連接導(dǎo)線的電阻值是顯示僅表橋臂電阻的一部分,對(duì)指示具有直接的影響,所以儀表出廠時(shí)在刻度面板上都標(biāo)有一定的外接電阻。在使用儀表之前,應(yīng)測(cè)量出連接導(dǎo)線的電阻,并按規(guī)定繞制電阻,調(diào)整好外接電阻值。
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主營(yíng):世界知名品牌的PLC、DCS系統(tǒng)備件模塊
①Allen-Bradley(美國(guó)AB)系列產(chǎn)品》
②Schneider(施耐德電氣)系列產(chǎn)品》
③General electric(通用電氣)系列產(chǎn)品》
④Westinghouse(美國(guó)西屋)系列產(chǎn)品》
⑤SIEMENS(西門子系列產(chǎn)品)》
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據(jù)通信及處理等。Invensys Triconex:冗余容錯(cuò)控制系統(tǒng)、基于三重模件冗余(TMR)
結(jié)構(gòu)的zui現(xiàn)代化的容錯(cuò)控制器。
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