Clamp-on ultrasonic flow metermuab ib txoj kev uas tsis yog-invasive los ntsuas cov kua dej ntws hauv cov kav dej. Txawm li cas los xij, txhawm rau txhawm rau ntsuas qhov tseeb thiab txhim khu kev qha, nws yog qhov tseem ceeb uas yuav tsum tau ua tib zoo saib xyuas ntau yam tseem ceeb:
Cov khoom siv yeeb nkab thiab qhov xwm txheej:
Cov khoom siv yeeb nkab: Qhov ntsuas qhov ua tau zoo yog cuam tshuam los ntawm cov khoom siv yeeb nkab. Xyuas kom lub 'meter' sib haum nrog cov khoom siv yeeb nkab, xws li steel, cam khwb cia hlau, lossis PVC.
Yeeb Nkab Phab Ntsa Thickness: Lub meter's transducers yuav tsum muaj peev xwm nkag mus rau hauv cov yeeb nkab phab ntsa kom raug ntsuas lub sij hawm hla ntawm lub teeb liab ultrasonic. Thicker yeeb nkab phab ntsa tej zaum yuav xav tau ntau haib transducers.
Pipe Surface Condition: Ib tug du, huv si yeeb nkab nto yog qhov zoo tagnrho rau kev pom cov teeb liab kis tau tus mob. Rough los yog corroded nto tuaj yeem degrade lub teeb liab zoo, ua rau kev ntsuas tsis raug.
Flow Profile:
Fully Developed Flow: Lub flow meter assumes ib tug tag nrho tsim txaus profile, lub ntsiab lus cov kua tau stabilized tom qab nkag mus rau hauv cov yeeb nkab. Tsis txhob txhim kho lub 'meter' ze ze rau khoov, li qub, lossis lwm yam kev cuam tshuam ntws.
Cov khoom ua kua dej:
Acoustic impedance: Lub acoustic impedance ntawm cov kua cuam tshuam rau kev sib kis ntawm lub teeb liab ultrasonic. Rau cov kua dej uas muaj lub siab acoustic impedance, xws li dej, lub ntsuas yuav ua tau zoo dua li cov kua dej uas tsis tshua muaj suab nrov.
Fluid Temperature: Kub tuaj yeem cuam tshuam qhov nrawm ntawm lub suab hauv cov kua dej, cuam tshuam qhov tseeb ntawm qhov ntsuas. Qee lub 'meter' muaj qhov kub thiab txias them nyiaj rau qhov no.
Fluid Conductivity: Rau cov kua dej conductive, electromagnetic cuam tshuam (EMI) tuaj yeem cuam tshuam qhov ntsuas qhov ua tau zoo. Tiv thaiv cov transducers los yog siv cov cables tshwj xeeb tuaj yeem pab txo qhov teeb meem no.
Meter Calibration:
Factory Calibration: Xyuas kom lub 'meter' yog Hoobkas-calibrated rau qhov tseeb ntsuas.
Field Calibration: Qee qhov xwm txheej, kev ntsuas qhov ntsuas yuav tsim nyog los suav rau cov kev teeb tsa tshwj xeeb thiab cov khoom siv dej.
Regular Calibration: Periodic calibration yog pom zoo kom tswj tau qhov tseeb raws sijhawm.
Installation thiab Alignment:
Kev Txhim Kho Kom Zoo: Ua raws li cov chaw tsim khoom cov lus qhia rau kev teeb tsa kom raug, suav nrog kev taw qhia ntawm cov transducers.
Alignment: Xyuas kom cov transducers raug raws li cov yeeb nkab axis kom txo qhov kev ntsuas qhov yuam kev.
Cable Routing: Siv cov cables kom deb ntawm qhov muaj peev xwm cuam tshuam, xws li hluav taws xob cables lossis motors.
Environmental Factors:
Kub thiab av noo: Qhov kub thiab txias heev tuaj yeem cuam tshuam qhov ntsuas qhov ua tau zoo. Xav txog kev siv cov ntsuas kub-compensated los yog txhim kho lawv nyob rau hauv qhov chaw tswj qhov kub thiab txias.
Electromagnetic Interference (EMI): EMI los ntawm cov khoom siv hluav taws xob nyob ze tuaj yeem cuam tshuam nrog lub ntsuas hluav taws xob. Tiv thaiv cov transducers thiab cables tuaj yeem pab txo qis EMI.
Los ntawm ua tib zoo xav txog cov xwm txheej no thiab ua raws li cov chaw tsim khoom cov lus qhia, koj tuaj yeem ua kom qhov tseeb thiab kev ntseeg siab ntawm koj lub clamp-on ultrasonic flow meter.