51196990-500

51196990-500

流量?jī)x表的選型對(duì)儀表能否成功使用往往起著很重要的作用弟跑，由于被測(cè)對(duì)象的復(fù)雜狀況以及儀表品種繁多、性能指標(biāo)各異孟辑，使得技術(shù)人員對(duì)儀表的選型感到困難。沒(méi)有一種十全十美的流量計(jì)扑浸，各類儀表都有各自的特點(diǎn)，選型的目的就是在眾多的品種中揚(yáng)長(zhǎng)避短喝噪，選擇自己zui合適的儀表。

　　一般選型可以從五個(gè)方面進(jìn)行考慮艳拿，這五個(gè)方面為儀表性能方面、流體特性方面舌必、安裝條件方面陷字、環(huán)境條件方面和經(jīng)濟(jì)因素方面。五個(gè)方面的詳細(xì)分析如下：

　　1述尊、儀表性能方面：準(zhǔn)確度、重復(fù)性扰褒、線性度、范圍度贮芹、流量范圍、信號(hào)輸出特性椭符、響應(yīng)時(shí)間、壓力損失等销钝；

　　2有咨、流體特性方面：溫度、壓力摔吏、密度纵装、粘度征讲、化學(xué)腐蝕、磨蝕性橡娄、結(jié)垢诗箍、混相、相變滤祖、電導(dǎo)率片家、聲速、導(dǎo)熱系數(shù)肿兴、比熱容，等指數(shù)湖诅；

　　3、安裝條件方面：管道布置方向塑汽，流動(dòng)方向舰缠，檢測(cè)件上下游側(cè)直管段長(zhǎng)度态练、管道口徑、維修空間普晌、電源、接地、輔助設(shè)備（過(guò)濾器滔吠、消氣器）、安裝疮绷、等；

　　4椅贱、環(huán)境條件方面：環(huán)境溫度只冻、濕度庇麦、電磁干擾喜德、安全性、防爆沪择、管道振動(dòng)等羞烘；

　　5伴乐、經(jīng)濟(jì)因素方面：儀表購(gòu)置費(fèi)蝉陕、安裝費(fèi)、運(yùn)行費(fèi)托足、校驗(yàn)費(fèi)、維修費(fèi)瓦统、儀表使用壽命、備品備件等金矛。

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