Xaiv qhov tsim nyog tiag tiagPortable ultrasonic flow meteryuav tsum xav txog ntau yam tseem ceeb. Nov yog tus kws tshaj lij txoj kev yuav khoom los pab koj kom tsis txhob muaj teeb meem tshwm sim:
Qhia meej meej koj cov kev xav tau tseem ceeb: Qhov khoom ntsuas yog dab tsi?
Hom kua: Dej ( dej huv, dej khib nyiab), roj, tshuaj daws teeb meem, slurries? Cov kua sib txawv muaj qhov sib txawv acoustic.
Lub xeev ua kua: Nws puas muaj cov npuas lossis cov khoom siv? Qhov kev huv huv yog dab tsi? Npuas thiab hais tuaj yeem cuam tshuam rau ultrasonic nthwv dej propagation thiab raug.
Qhov ntsuas qhov scenario yog dab tsi?
Kev kuaj ib ntus, tshuaj xyuas, kev tshuaj xyuas lub zog ua haujlwm, kev kuaj pom, kev soj ntsuam cov txheej txheem?
Cov khoom siv yeeb nkab: Hlau, cam khwb cia hlau, tooj liab, PVC, fiberglass, qhob yeeb nkab? Cov khoom sib txawv muaj peev xwm sib txawv suab nthwv dej.
Cov kab mob ntawm cov yeeb nkab: Puas yog phab ntsa sab hauv loj loj los yog corroded? Puas yog cov phab ntsa sab nrauv du, thiab nws puas muaj rwb thaiv tsev / corrosion tiv thaiv txheej? (Muaj cuam tshuam rau sensor coupling thiab teeb liab zoo).
Ib puag ncig tej yam kev mob: Kub kub, tsis tshua muaj kub, av noo, plua plav, qhov chaw txaus ntshai?
Koj xav tau cov ntaub ntawv tseem ceeb dab tsi?
Tsuas yog instantaneous flow rate thiab cumulative flow rate?
Koj puas xav tau kev khiav ceev, khiav kev taw qhia, thiab kub? (Ntau cov cuab yeej nqa tau yooj yim suav nrog ntsuas ntsuas kub.
Koj puas xav tau cov ntaub ntawv kaw lus, kev tshaj tawm, thiab kev xa xov wireless?
Koj qhov kev xav tau raug siab npaum li cas?
Kev lag luam dav dav (± 1-2%)? Cov kev xav tau siab tshaj (± 0.5% lossis siab dua)?
Cov kev xav tau raug cuam tshuam ncaj qha rau tus nqi thiab kev xaiv thev naus laus zis.
Measurement Principple (Core Differences):
Kev thauj mus los- txoj kev sib txawv lub sijhawm: feem ntau siv. Xam cov kev tshaj tawm los ntawm kev ntsuas lub sijhawm sib txawv ntawm ultrasonic nthwv dej propagating downstream thiab upstream. Haum rau cov kua dej huv huv.
Doppler effect method: Siv cov zaus hloov pauv ntawm ultrasonic tsis cuam tshuam los ntawm cov khoom raug tshem tawm lossis npuas hauv cov kua los suav cov kev tshaj tawm.
Haum rau cov kua dej qias neeg thiab slurries uas muaj qhov tsim nyog ntawm cov khoom tawg. Lus Cim: Ob lub hauv paus ntsiab lus siv rau cov xwm txheej sib txawv; xaiv qhov tsis ncaj ncees lawm tuaj yeem ua rau kev ntsuas tsis ua haujlwm lossis qhov tseeb tsis zoo. Siab- kawg portable meters feem ntau muab ob hom (dual-mode).
Sensor Installation Method:
Clamp- ntawm hom: Qhov kev xaiv tseem ceeb, tsis yog- ntsuas kev sib cuag, yooj yim thiab ceev installation, tsis ua rau cov yeeb nkab puas, thiab tsis muaj qhov poob siab. Qhov no yog qhov txiaj ntsig tseem ceeb ntawm portable meters.
V-txoj kev: Feem ntau siv, muaj feem xyuam rau ntau yam ntawm cov yeeb nkab diameters, thiab muaj qhov yuav tsum tau ua rau qis qis. Z- txoj kev: Tsim nyog rau txoj kev teeb liab ntev, cov teeb liab muaj zog, thiab cov ntawv thov nrog cov yeeb nkab me me, qhov tsis zoo acoustic (xws li cov kav dej los yog cov kav dej uas muaj qhov ntsuas sab hauv), lossis cov dej ntws tsawg. Txawm li cas los xij, nws yuav tsum muaj qhov tseeb ntau dua ntawm kev teeb tsa.
N-txoj kev: Haum rau cov yeeb nkab loj heev.
Insertion hom: Yuav tsum tau drilling qhov hauv cov yeeb nkab rau nruab qhov kev sojntsuam. Feem ntau muaj qhov tseeb dua thiab ruaj khov, thiab muaj zog tiv thaiv kev cuam tshuam. Haum rau ntev - lub sij hawm soj ntsuam cov ntsiab lus los yog cov xwm txheej uas clamp- ntawm hom tsis haum (xws li, kev ntsuas hnyav, cov kav dej ua vaj tse, cov kav dej sib txuas). Txuag kev thauj mus los thiab tsis yog -invasiveness.
Spool piece hom: Yuav tsum tau txiav cov yeeb nkab rau kev teeb tsa. Muab qhov tseeb tshaj plaws thiab kev ruaj ntseg zoo tshaj plaws, tab sis tag nrho tsis muaj kev txav mus los. Feem ntau siv rau kev teeb tsa ruaj khov.
Rau cov ntawv thov nqa tau yooj yim, lub clamp- ntawm hom yog qhov kev xaiv zoo tshaj! Ua tib zoo saib nws cov yeeb nkab txoj kab uas hla, cov khoom siv yeeb nkab, thiab hom hauv ob sab phlu.
Qhov tseeb:
Qhov no yog ib qho tseem ceeb qhia. Feem ntau teev raws li "± X% ntawm kev nyeem ntawv" lossis "± Y% ntawm tag nrho cov nplai". Tus qub yog ntau lub ntsiab lus.
Nco ntsoov nkag siab txog cov xwm txheej sim rau qhov tseeb (feem ntau nyob rau hauv qhov chaw kuaj pom zoo). Qhov tseeb ntawm qhov chaw muaj kev cuam tshuam zoo heev los ntawm kev teeb tsa, cov kav dej, thiab cov dej hauv lub xeev.
Rau cov khoom siv nqa tau yooj yim, ± 1% kev nyeem ntawv raug yog qib sib xws thiab siv tau. Qhov tseeb siab tuaj yeem ncav cuag ± 0.5% lossis siab dua (nrog rau tus nqi sib txuas).