SIEMENS西門子超聲波流量計(jì)7ML1028-4AA20

西門子管段式超聲波流量儀表是以“速度差法"為原理，測量圓管內(nèi)液體流量的儀表。它采用了的多脈沖技術(shù)、信號(hào)數(shù)字化技術(shù)及糾錯(cuò)技術(shù)，使流量儀表能適應(yīng)工業(yè)現(xiàn)場的環(huán)境，計(jì)量方便、經(jīng)濟(jì)、準(zhǔn)確。達(dá)到外，可廣泛應(yīng)用于石油、化工、冶金、電力、給排水等領(lǐng)域。
    西門子超聲波流量計(jì)是通過檢測流體流動(dòng)對超聲束(或超聲脈沖)的作用以測量流量的儀表。
    原理
    根據(jù)對信號(hào)檢測的原理超聲流量計(jì)可分為傳播速度差法(直接時(shí)差法、時(shí)差法、相位差法和頻差法)、波束偏移法、多普勒法、互相關(guān)法、空間濾法及噪聲法等。
    西門子超聲流量計(jì)和超聲波流量計(jì)樣，因儀表流通通道未設(shè)置任何阻礙件，均屬*流量計(jì)，是適于流量測量困難問題的類流量計(jì)，特別在大口徑流量測量方面有較突出的優(yōu)點(diǎn)，它是發(fā)展迅速的類流量計(jì)之。
    西門子超聲波流量計(jì)采用時(shí)差式測量原理：個(gè)探頭發(fā)射信號(hào)穿過管壁、介質(zhì)、另側(cè)管壁后，被另個(gè)探頭接收到，同時(shí)，二個(gè)探頭同樣發(fā)射信號(hào)被*個(gè)探頭接收到，由于受到介質(zhì)流速的影響，二者存在時(shí)間差Δt，根據(jù)推算可以得出流速V和時(shí)間差Δt之間的換算關(guān)系V=(C2/2L)×Δt，進(jìn)而可以得到流量值Q。

SIEMENS西門子超聲波流量計(jì)7ML1028-4AA20
    SIEMENS超聲波流量計(jì)  西門子流量計(jì)型號(hào)：
    7ML12011EF00 7ML1201-1EF007ML12011AF00 7ML1201-1AF007ML12011EE00 7ML1201-1EE007ML12011AE00 7ML1201-1AE007ML12011EK00 7ML1201-1EK007ML12012EE00? 7ML1201-2EE007ML12012AE00 7ML1201-2AE007ML12011EC10 7ML1201-1EC107ML12011ED10 7ML1201-1ED107ML12012EA10 7ML1201-2EA107ML12012AA10 7ML1201-2AA107ML12011EA10 7ML1201-1EA107ML5221-1BA11 7ML5221-1BA127ML5221-1BA21 7ML5221-1BA257ML5221-1DA11 7ML5221-1DA127ML5221-1DA21 7ML5221-1DA257ML5221-2DA11 7ML5221-2BA117ML5221-1AA11
    7ML5221-1CA117ML5221-1AA12 7ML5221-1CA127ML5033-1BA00-1A7ML5033-1AA00-1A7ML5033-1BB00-1A7ML5033-1BA10-1A7ML5033-1BA00-1B7ML5033-1CA00-1A7ML5033-2BA10-1A7ML5033-2BA10-2A
    7ML1025-1BD017ML1025-1BD117ML1025-2BD017ML1025-2BD117ML1025-1CD017ML1025-2CD017ML1028-4AA107ML1028-4AA207ML1028-4AA307ML1028-4BA107ML1028-4BA207ML5033-2BA10-2B7ML1025-1BD017ML1025-1BD117ML1025-2BD017ML1025-2BD117ML1025-1CD017ML1025-2CD017ML1028-4AA107ML1028-4AA207ML1028-4AA307ML1028-4BA107ML1028-4BA207ML1028-4BA307ML1028-4AB107ML1028-4AB307ML1028-4AC107ML1028-4AC30?
    7ML1034-1AA17ML1034-1AA27ML1034-1BA17ML1034-2AA17ML1034-2BA17ML1034-2AA117ML1034-2AA127ML1034-2BA117ML1034-1AA117ML1034-3AA11