型號描述
質(zhì)量流量測量儀用于在工藝技術(shù)領(lǐng)域直接測量氣體通過量。在體積流量測量儀中,還需要測量溫度和壓力或密度,因?yàn)闅怏w的密度或體積會因壓力的不同而發(fā)生變化。與之相反,質(zhì)量流量的測量并不受壓力和溫度影響。8700 型數(shù)字式質(zhì)量流量測量儀具有一個傳統(tǒng)的毛細(xì)管狀傳感器(參見第 2 頁的描述),該傳感器處于旁路管道中。當(dāng)前流量可被作為模擬的標(biāo)準(zhǔn)信號通過現(xiàn)場總線輸出,或者通過 RS 通訊輸出。可針對兩種不同的氣體對型號 8700 進(jìn)行校準(zhǔn),用戶可在兩者之間進(jìn)行轉(zhuǎn)換。根據(jù)用戶要求的不同,在選擇與介質(zhì)相接觸的接頭的材料時應(yīng)確保,可利用所有的普通工藝氣體運(yùn)行設(shè)備。典型用途是,在檢驗(yàn)機(jī)構(gòu)、環(huán)境技術(shù)、消耗計(jì)數(shù)器、分析儀器中測量氣體流量。
1)采用毛細(xì)管技術(shù)的旁通裝置,適合額定流量范圍 5 mlN/min 至 10 lN/min
2)適合侵蝕性氣體
3)現(xiàn)場總線選項(xiàng)
Type Description
The mass flow meter (MFM) Type 8700 is especially suited for measuring the mass flow of aggressive gases, which need a sensor which is not in direct contact with the gas. The thermal capillary sensor reaches fast response times. Type 8700 can optionally be calibrated for two different gases; the user can switch between these two gases. As electrical interfaces both, analog standard signals and fieldbuses are available.
1)Nominal flow ranges from 0.005 lN/min to 15 lN/min
2)High accuracy
3)Applicable for aggressive gases
4)Optional: Fieldbus interface