10105/2/1

10105/2/1

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匿贴，由于被測(cè)對(duì)象的復(fù)雜狀況以及儀表品種繁多凑篇、性能指標(biāo)各異，使得技術(shù)人員對(duì)儀表的選型感到困難耗述。沒(méi)有一種十全十美的流量計(jì)托蜡，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)避短妒彭，選擇自己zui合適的儀表谢燎。

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

　　1陶店、儀表性能方面：準(zhǔn)確度戴卜、重復(fù)性逾条、線性度、范圍度投剥、流量范圍师脂、信號(hào)輸出特性、響應(yīng)時(shí)間江锨、壓力損失等吃警；

　　2、流體特性方面：溫度、壓力酌心、密度拌消、粘度、化學(xué)腐蝕安券、磨蝕性墩崩、結(jié)垢、混相侯勉、相變鹦筹、電導(dǎo)率、聲速以睦、導(dǎo)熱系數(shù)泌醋、比熱容，等指數(shù)滤钠；

　　3赌拒、安裝條件方面：管道布置方向，流動(dòng)方向祠裸，檢測(cè)件上下游側(cè)直管段長(zhǎng)度昙椭、管道口徑、維修空間蒜丙、電源因饥、接地、輔助設(shè)備（過(guò)濾器溯童、消氣器）请立、安裝、等求馋；

　　4捐憔、環(huán)境條件方面：環(huán)境溫度、濕度迫筑、電磁干擾宪赶、安全性、防爆脯燃、管道振動(dòng)等搂妻；

　　5、經(jīng)濟(jì)因素方面：儀表購(gòu)置費(fèi)辕棚、安裝費(fèi)欲主、運(yùn)行費(fèi)、校驗(yàn)費(fèi)逝嚎、維修費(fèi)扁瓢、儀表使用壽命、備品備件等。

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