10101/2/1

10101/2/1

流量儀表的選型對儀表能否成功使用往往起著很重要的作用反饲，由于被測對象的復(fù)雜狀況以及儀表品種繁多、性能指標(biāo)各異邓刻，使得技術(shù)人員對儀表的選型感到困難堵闪。沒有一種十全十美的流量計，各類儀表都有各自的特點(diǎn)锦是，選型的目的就是在眾多的品種中揚(yáng)長避短涤玷，選擇自己zui合適的儀表。

　　一般選型可以從五個方面進(jìn)行考慮漓琢，這五個方面為儀表性能方面称几、流體特性方面、安裝條件方面稿施、環(huán)境條件方面和經(jīng)濟(jì)因素方面疫稿。五個方面的詳細(xì)分析如下：

　　1、儀表性能方面：準(zhǔn)確度鹃两、重復(fù)性遗座、線性度、范圍度俊扳、流量范圍途蒋、信號輸出特性、響應(yīng)時間馋记、壓力損失等号坡；

　　2、流體特性方面：溫度抗果、壓力筋帖、密度、粘度冤馏、化學(xué)腐蝕日麸、磨蝕性、結(jié)垢逮光、混相代箭、相變、電導(dǎo)率蔬澜、聲速人薯、導(dǎo)熱系數(shù)、比熱容阶糖，等指數(shù)吸辑；

　　3、安裝條件方面：管道布置方向秃练，流動方向串飘，檢測件上下游側(cè)直管段長度、管道口徑雁痪、維修空間钳砰、電源、接地猴襟、輔助設(shè)備（過濾器许话、消氣器）、安裝曼庆、等稍途；

　　4、環(huán)境條件方面：環(huán)境溫度睛竣、濕度晰房、電磁干擾、安全性射沟、防爆殊者、管道振動等；

　　5验夯、經(jīng)濟(jì)因素方面：儀表購置費(fèi)猖吴、安裝費(fèi)、運(yùn)行費(fèi)挥转、校驗(yàn)費(fèi)海蔽、維修費(fèi)、儀表使用壽命绑谣、備品備件等党窜。

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