Yuav Ua Li Cas Calibrate Flow Meter: Txoj Kev & Txheej Txheem

Raws li tus neeg xa khoom ntws ntws, cov lus nug uas peb hnov ​​feem ntau tom qab xa khoom tsis yog hais txog kev xaim lossis kev teeb tsa - lawv yog hais txog kev ntseeg siab. Qhov ntsuas ntsuas puas raug? Peb ua pov thawj li cas? Thiab thaum tus naj npawb ntawm cov zaub pib drift, puas yog lub 'meter' ua txhaum lossis yog ib yam dab tsi hauv cov txheej txheem los liam? Calibration yog li cas koj teb tag nrho peb.

Phau ntawv qhia no piav qhia txog yuav ua li cas ntsuas lub ntsuas ntsuas qhov uas nws ua tiav hauv cov nroj tsuag tiag tiag thiab ntawm cov kav dej tiag tiag: xaiv ib txoj hauv kev uas haum rau qhov xwm txheej, khiav cov txheej txheem rov ua dua, suav qhov yuam kev, teeb tsa lub siab ntev koj tuaj yeem tiv thaiv, thiab khaws cov ntaub ntawv khaws cia hauv kev tshuaj xyuas. Qhov twg nws yuav pab tau, peb tau ntxiv cov ntawv sau tseg - cov ntsiab lus me me uas cais qhov kev ntsuas huv ntawm ib qho kev nkag siab yuam kev.

Dab tsi Flow Meter Calibration Tiag Tiag

Flow meter calibration yog tus txheej txheem ntawm kev sib piv ib lub ntsuas qhov kev nyeem ntawv tawm tsam tus qauv siv kev ntseeg siab kom paub seb nws ntsuas tau li cas thoob plaws nws qhov kev ua haujlwm. Qhov kev sib piv ntawd tsuas yog txhais tau tias qee yam yog tias qhov kev siv muaj kev ntseeg siab dua li qhov ntsuas hauv qab ntsuas - ib qho taw qhia peb rov qab mus rau hauv qab no.

Peb lo lus tau siv sib hloov ntawm cov nroj tsuag hauv pem teb, tab sis lawv piav qhia txog kev sib txawv:

• Kev pov thawjyog daim tshev: puas yog lub 'meter' tseem poob rau hauv nws qhov kev tso cai? Tsis muaj dab tsi hloov.
• Calibrationyog cov ntaub ntawv sib piv tawm tsam tus qauv siv, sau tseg seb lub 'meter' dhau los lossis ua tsis tiav.
• Kev khoyog hloov qhov ntsuas qhov ntsuas, K-factor, tso zis scaling, los yog transmitter teeb kom cov nyeem kab nrog rau siv.

Hauv kev xyaum, ntau pab pawg txheeb xyuas thawj zaug thiab tsuas yog ntsuas thiab kho yog tias lub ntsuas ntsuas tsis ua haujlwm - ib ntu peb suav nrog ntau yam ntxiv hauv peb daim ntawv qhia txog qhov sib txawv ntawmcalibration, verification, thiab validation. Kev kho tag nrho peb li ib kauj ruam yog ib qho ntawm cov ntaub ntawv tsis meej pem.

Thaum twg Koj Yuav Tsum Calibrate Flow Meter?

Tsis muaj ib lub sijhawm haum rau txhua lub 'meter'. Lub sijhawm zoo nyob ntawm hom ntsuas, qhov kev pheej hmoo ntawm cov txheej txheem, qhov tseeb uas koj xav tau tiag tiag, dej txias, cov kev cai tswj hwm, thiab keeb kwm drift ntawm cov cim tshwj xeeb.

Calibrate - lossis tsawg kawg txheeb xyuas - thaum:

• Kev nyeem ntawv tsis phim qhov txheej txheem yuav tsum ua
• Cov khoom zoo lossis cov txiaj ntsig batching tig tsis sib xws
• Kev siv cov khoom siv hloov pauv yam tsis muaj txheej txheem piav qhia
• Ib lub 'meter' twb nyuam qhuav tau teeb tsa, tsiv, lossis kho
• Cov kua dej, qhov kub thiab txias, siab, lossis kev ua haujlwm tau hloov pauv
• Lub ntsuas tau pom kev vibration, corrosion, deposits, lossis mechanical hnav
• Cov ntaub ntawv yav dhau los qhia tias drift creeping dhau sijhawm
• Lub 'meter' zaum hauv qhov tseem ceeb ntawm kev nyab xeeb, zoo, lossis lub luag haujlwm them nqi

Rau qhov tsis yog - kev pabcuam tseem ceeb, kev txheeb xyuas lub sijhawm ntawm kev ntsuas tag nrho yog feem ntau txaus. Rau cov meters khi rau kev nyab xeeb, cov khoom lag luam zoo, lossis kev them nqi, cov ntaub ntawv teev cia yog qhov kev xaiv zoo dua. Ib qho kev ceeb toom: "teeb ​​calibration ncua sij hawm" tsis zoo ib yam li "xaiv tus lej." Lub sijhawm tiv thaiv tau tsim los ntawm cov txheej txheem kev pheej hmoo, cov txiaj ntsig yav dhau los, thiab cov chaw tsim khoom pom zoo - tsis yog los ntawm tus cwj pwm.

Yuav Ua Li Cas Xaiv Flow Meter Calibration Method

Qhov zoo tshaj plaws calibration txoj kev los mus rau peb cov lus nug: yuav ua li cas yog qhov kev tshwm sim, seb lub 'meter' yuav raug tshem tawm ntawm kab, thiab seb cov txheej txheem yuav tsum tau nres. Plaub txoj hauv kev hauv qab no teb cov lus nug txawv.

Wet Calibration

Kev ntsuas ntub dej ntsuas lub ntsuas ntsuas nrog cov kua dej tiag tiag lossis roj ntws, muab piv rau qhov kev siv paub xws li gravimetric (hnyav- tank) system, volumetric prover, lossis calibrated flow standard. Vim tias nws siv lub ntsuas ntsuas raws li qhov tseeb ntws, nws feem ntau yog txoj kev muaj txiaj ntsig tshaj plaws thaum qhov tseeb tseem ceeb. Kev lag luam tawm - tawm yog tus nqi thiab kev cuam tshuam: nws feem ntau txhais tau tias tshem tawm lub ntsuas hluav taws xob lossis xa mus rau qhov chaw ntsuas ntsuas.

Master Meter Calibration

Master meter calibration muab qhov siab - qhov tseeb siv ntsuas ntsuas hauv koob nrog lub ntsuas ntsuas hauv qab ntsuas, yog li tib qhov ntws dhau los ntawm ob qho tib si thiab kev nyeem ntawv sib piv. Nws yog cov tswv yim ntawm qhov chaw thiab txwv downtime, tab sis qhov tshwm sim tsuas yog zoo li tus tswv 'meter' tus kheej raug, mob, installation, thiab traceability. Peb taug kev los ntawm qhov no hauv peb phau ntawv qhiacalibrating ib tug flow meter tiv thaiv ib tug master meter.

Qhuav Calibration thiab Electronic Verification

Qhuav calibration xyuas cov khoom siv hluav taws xob, cov teeb liab tso tawm, kev ntsuas qhov ntsuas hluav taws xob, thiab cov lus teb simulated yam tsis muaj dej ntws. Nws yog qhov ceev thiab muaj txiaj ntsig zoo rau kev daws teeb meem ntawm lub tshuab xa tawm, tab sis nws tsis tuaj yeem ua pov thawj tias qhov ntsuas pom, cov yeeb nkab mob, lossis qhov ntws profile yog qhov tseeb.Field Note:ib lub 'meter' tuaj yeem xeem dhau qhov kev xeem qhuav thiab tseem ua tsis tau zoo hauv kev pabcuam, yog li kho qhov ntsuas kom qhuav raws li kev kuaj xyuas hluav taws xob, tsis yog sawv ntsug- rau kev ntsuas ntsuas dej thaum qhov tseeb yog qhov tseem ceeb.

Field Calibration vs Laboratory Calibration

Field calibration xyuas lub ntsuas qhov chaw nws nyob, raws li cov txheej txheem tiag tiag - txoj cai hu rau cov kav dej loj, cov khoom siv hluav taws xob, thiab cov kab uas tsis tuaj yeem rhuav tshem. Laboratory calibration muab kev tswj nruj dua, txo qis qhov tsis paub tseeb, thiab cov ntaub ntawv raug cai, uas yog qhov tseem ceeb ntawm kev ua tau zoo, kev nyab xeeb, thiab kev saib xyuas- hloov daim ntawv thov feem ntau xav tau. Lawv teb cov lus nug sib txawv: lub chaw kuaj mob qhia koj tias lub ntsuas ntsuas ua tau zoo li cas, thaj chaw qhia koj tias nws ua haujlwm li cas. Tsis yog yuav "zoo dua."

Koj yuav tsum siv txoj kev Calibration twg?

Cov lus no qhia txog yuav ua li cas plaub txoj kev sib piv ntawm cov xwm txheej uas feem ntau tsav qhov kev txiav txim siab.

Yam koj xav tau ua ntej koj Calibrate

Rushing lub teeb yog ib qho ntawm feem ntau ua rau lub calibration uas zoo li ib tug meter txhaum tab sis tsis yog. Ua ntej koj pib, sau cov ntsuas, txheej txheem, siv, thiab cov ntaub ntawv.

• Flow meter phau ntawv thiab cov ntaub ntawv
• Cov ntaub ntawv calibration yav dhau los
• Meter tag naj npawb, serial tooj, loj, thiab ntau yam
• Cov ntaub ntawv ua kua dej
• Kev khiav hauj lwm ntws li qub
• Yuav tsum kam rau siab los yog lees txais
• Ib tus qauv siv lossis tus ntsuas ntsuas nrog daim ntawv pov thawj calibration siv tau
• Daim ntawv teev cov ntaub ntawv lossis digital logger
• Kho cov fittings, hoses, gaskets, thiab adapters
• Yuav tsum tau PPE thiab txheej txheem kaw / tagout
• Cov khoom siv hluav taws xob ruaj khov thiab cov teeb liab ntsuas cov cuab yeej
• Kev ntsuas kub thiab ntsuas siab, yog tias xav tau kev them nyiaj

Tom qab ntawd kos lub installation. Ib lub 'meter' mounted ze ze rau lub luj tshib, li qub, twj, lossis reducers pom qhov sib txawv ntawm qhov sib txawv thiab yuav nyeem tsis zoo txawm tias nws zoo npaum li cas. Paub meej tiasupstream thiab downstream ncaj - yeeb nkab yuav tsumua ntej koj nyeem ib lub ntsiab lus.

Flow Meter Calibration Procedure: Kauj ruam los ntawm kauj ruam

Cov ntsiab lus sib txawv los ntawm meter hom thiab txoj kev, tab sis lub moj khaum no tuav rau feem ntau kev lag luam ua haujlwm. Yog hais tias koj xav tau ib tug condensed version rau daim ntawv teev cia, pebCov kev coj ua zoo tshaj plaws rau calibrating flowmeternpog tib av hauv daim ntawv teev npe.

Kauj Ruam 1: Txheeb xyuas qhov ntsuas thiab txheej txheem txheej txheem

Paub meej hom 'meter', ntsuas ntau yam, tso zis teeb liab, txheej txheem dej, kab loj, thiab kev ua haujlwm ib txwm muaj. Tom qab ntawd saib lub 'meter' dua rau qhov pom tseeb qhov tsis raug uas rhuav tshem qhov kev ntsuas ua ntej nws pib: cov xaim puas, xoob hauv av, corrosion, txheej los yog buildup, huab cua npuas hauv kev pabcuam ua kua, thaiv cov kab impulse, hnav cov khoom txav, lossis tsis raug xa mus rau ntau qhov chaw.

Tsis txhob kho dab tsi. Koj xav tauraws li - pomcov ntaub ntawv - yuav ua li cas lub 'meter' ua ua ntej ib qho kev kho - kom nkag siab txog drift thiab txheej txheem kev pheej hmoo tom qab.

Kauj Ruam 2: Nruab Tus Txheej Txheem Qhia Kom raug

Nruab tus tswv 'meter', pov thawj, lossis tus qauv siv raws li nws cov lus qhia. Yog tias koj siv lub ntsuas hluav taws xob, muab tso rau hauv series nrog lub ntsuas ntsuas hauv qab ntsuas kom ob qho tib si pom zoo tib yam ntws. Ua tib zoo saib xyuas cov kev taw qhia ntws, cov yeeb nkab sib dhos, tag nrho cov yeeb nkab, ncaj - khiav cov kev cai, cov dej xau, cov hnab ntim huab cua, hauv av, thiab kub thiab siab stability.

Ib qho kev siv tsis zoo yuav ua rau lub meter zoo kawg nkaus saib tawg. Hauv kev ua haujlwm, ntau qhov "ua tsis tiav" calibrations rov qab mus rau qhov kev teeb tsa lossis cov txheej txheem txheej txheem dua li qhov ntsuas qhov ntsuas tsis zoo.

Kauj Ruam 3: Stabilize Flow

Khiav lub kaw lus kom txog thaum cov dej ntws tsis tu ncua, thiab zam kev nyeem ntawv tam sim tom qab qhib lub valve lossis pib lub twj tso kua mis. Stable flow txo random yuam kev. Yog tias qhov kev nyeem ntawv hloov pauv, sau cov qauv txaus kom tau txais qhov nruab nrab txhim khu kev qha lossis - zoo dua - nrhiav seb vim li cas nws tsis ruaj khov ua ntej txuas ntxiv.

Kauj Ruam 4: Ntsuas Ntau Cov Ntsiab Lus Flow

Tsis txhob calibrate ntawm ib tus nqi txaus tshwj tsis yog tias daim ntawv thov tiag tiag khiav hla ib qho nqaim heev. Ntawm txhua qhov taw tes: teeb tsa tus nqi ntws, cia qhov kev nyeem ntawv ruaj khov, sau cov ntawv nyeem siv, sau cov ntsuas ntsuas, thiab rov ua kom paub tseeb tias rov ua dua. Sau cov ntawv nyeem thawj zaug liraws li - pomcov ntaub ntawv.

Kauj ruam 5: xam qhov yuam kev

Nyob rau hauv txhua rooj plaub, sib piv cov 'meter' nyeem ntawv nrog rau kev siv. Ib qho yooj yim yuam kev formula yog:

yuam kev (%)=[(Meter Reading − Reference Reading) / Reference Reading] × 100

Piv txwv li, nrog rau kev siv ntawm 100.0 L / min thiab meter nyeem ntawm 102.0 L / min, qhov yuam kev yog [(102.0 − 100.0) / 100.0] × 100=2.0%. Qhov ntsuas tau nyeem 2.0% siab ntawm qhov taw tes ntawd.

Kauj Ruam 6: Kho qhov Meter Factor lossis K-Factor

Yog tias lub ntsuas hluav taws xob nyob sab nraud thiab kev hloov kho tau tso cai, hloov kho qhov ntsuas qhov ntsuas, K-factor, transmitter scaling, lossis output configuration raws li cov chaw tsim khoom cov lus qhia. Siv cov ntaub ntawv calibration, tsis yog kwv yees, thiab nco ntsoov tias cov kev tswj hwm lossis cov txheej txheem tseem ceeb yuav xav tau cov neeg ua haujlwm tsim nyog los hloov pauv.

Yog hais tias qhov yuam kev tsis zoo ib yam thoob plaws qhov ntau, tsis txhob yuam kev kho ib zaug. Ib qho yuam kev uas hloov nrog ntws feem ntau taw qhia rau kev teeb tsa, tshuab, hluav taws xob, lossis txheej txheem teeb meem uas hloov kho ib leeg yuav tsis kho.

Kauj ruam 7: Re-Test thiab Sau Raws li-Cov ntaub ntawv sab laug

Tom qab hloov kho, rov ua cov ntsiab lus xeem thiab sau cov ntawv nyeem zaum kawg liraws li - sab laugcov ntaub ntawv. Cov ntaub ntawv raws li -sab laug ua pov thawj seb qhov kev kho puas ua haujlwm. Yog tias lub ntsuas ntsuas tseem ua tsis tiav, sau nws thiab tshawb xyuas ua ntej xa rov qab mus rau kev pabcuam.

Yuav Ua Li Cas Xaiv Calibration Test Points?

"Test at low, medium, and high flow" yog qhov pib zoo, tab sis nws tsis meej txaus rau nws tus kheej. Ob txoj hauv kev ua haujlwm tau zoo:

• Tsau feem pua ​​ntawm ntau yam- feem ntau 25%, 50%, 75%, thiab 100% ntawm qhov ntsuas qhov ntsuas, uas nthuav tawm cov ntsiab lus sib npaug thiab nthuav tawm tsis yog -linearity.
• Kev khiav hauj lwm -band weighting- yog hais tias lub 'meter' ib txwm khiav ntawm, hais, 30% thiab 70% ntawm ntau yam, mloog zoo cov ntsiab lus nyob rau hauv lub band es tsis mus chasing tag nrho - teev tus lej cov txheej txheem yeej tsis ncav cuag.

• 

Rov ua dua yam tsawg kawg ntawm cov ntsiab lus tseem ceeb kom paub meej tias rov ua dua; ib lub 'meter' uas muab cov lus teb sib txawv ntawm qhov thib ob pass muaj teeb meem qhov nruab nrab yuav nkaum. Muaj pes tsawg lub ntsiab lus koj xav tau, thiab qhov twg, kuj nyob ntawm qhovyam uas cuam tshuam rau kev ntsuas qhov tseebrau qhov tshwj xeeb technology.

Yuav ua li cas xam Flow Meter Calibration yuam kev

Qhov kev xam feem ntau yog feem pua ​​yuam kev:

yuam kev (%)=[(Indicated Flow − Reference Flow) / Reference Flow] × 100

Koj tseem tuaj yeem nthuav qhia qhov tshwm sim raws li qhov kho kom raug:

Correction Factor=Reference Flow / Indicated Flow

Piv txwv li, nrog rau qhov qhia tau tias ntws ntawm 98.0 L / min tawm tsam qhov kev siv ntawm 100.0 L / min, qhov kho qhov zoo yog 100.0 / 98.0=1.0204. Lub 'meter' nyeem qis, thiab nws xav tau kev kho yog tias qhov yuam kev dhau qhov kev tso cai zam. Siv qhov kev kho raws li qhov tshwj xeeb 'meter' xav tau nws: qee qhov siv K-factor, qee qhov ntsuas ntsuas, thiab qee qhov xav tau kev hloov pauv hloov pauv lossis digital parameter hloov.

Dab tsi yog Qhov Txais Flow Meter Calibration yuam kev?

Tsis muaj universal pass/fail number. Qhov kev lees paub yuam kev - kam rau ua - yog teem los ntawm qhov twg ntawm cov no yog nruj tshaj plaws rau koj daim ntawv thov:

• Cov txheej txheem yuav tsum tau (yuav ua li cas yuam kev daim ntawv thov tuaj yeem nqus tau)
• Koj qhov system zoo lossis cov neeg siv khoom pom zoo
• Lub meter tau tshaj tawm qhov tseeb specification
• Kev tswj hwm lossis kev cai lij choj - ntsuas ntsuas

Rau kev lag luam thiab kev saib xyuas- kev ntsuas kev hloov pauv, cov kev txwv kawg no tsis tuaj yeem sib tham. Hauv Tebchaws Meskas, piv txwv li, kev zam rau kev ntsuas cov cuab yeej siv hauv kev lag luam - suav nrog cov kua- ntsuas cov khoom siv thiab cov ntsuas ntsuas huab hwm coj - tau txhais hauvNIST Phau Ntawv 44, thiab sib piv txoj cai lij choj - cov cai ntsuas ntsuas siv nyob rau lwm lub tebchaws. Xaiv qhov kam rau ua tsuas yog vim cov ntaub ntawv qhia tau hais tias qhov tseeb yog qhov yuam kev; daim ntawv thov txiav txim siab seb qhov twg yog qhov ua tau, tsis yog daim ntawv qhia.

Ib lub hauv paus ntsiab lus txhawb nqa tag nrho cov no: cov ntaub ntawv siv yuav tsum muaj lub ntsiab lus tseeb dua li qhov ntsuas ntsuas. Lub hom phiaj siv dav yog qhov ntsuas qhov tsis paub meej ntawm qhov sib piv ntawm 4: 1, txhais tau tias qhov kev siv tsis paub tseeb yog kwv yees li ib feem peb ntawm qhov kev kam rau siab uas koj tab tom kuaj xyuas.

Reference Standards, Traceability, thiab Uncertainty

Ib qho txiaj ntsig calibration tsuas yog ntseeg tau raws li tus qauv qab nws. Peb yam ua rau kev siv tus qauv tiv thaiv:

• Traceability- ib qho kev sib piv tsis sib xws uas txuas koj cov ntaub ntawv rov qab mus rau lub teb chaws lossis thoob ntiaj teb tus qauv. Lub hauv paus ntsiab lus tau teev tseg nyob rau hauvNIST txoj cai ntawm metrological traceability.
• Ib tug calibration raws li txoj cai- cov ntaub ntawv siv nws tus kheej nyob rau hauv - daim ntawv pov thawj hnub, tsis yog ib tug tas sij hawm.
• Hais tsis meej- txhua kauj ruam hauv cov saw hlau muaj qhov tsis paub tseeb, thiab qhov tsis paub tseeb yuav tsum muaj tsawg txaus los ua kom qhov sib piv muaj txiaj ntsig.

Qhov no yog vim li cas, rau kev ua haujlwm raug cai, lub chaw soj nstuam tau lees paub rauISO / IEC 17025 Kev Tswj Xyuas Kev Lag Luamyog cov qauv ntsuas: kev lees paub yog cov pov thawj ywj pheej uas lub chaw kuaj xyuas cov txheej txheem, cov cuab yeej siv, thiab kev taug qab tau zoo. Traceability ntawm nws tus kheej, txawm li cas los xij, tsis tau lees tias kev nyab xeeb rau lub hom phiaj - qhov tsis paub tseeb tseem yuav tsum ua kom haum rau qhov ntsuas koj ua.

Calibration Tips los ntawm Flow Meter Type

Cov thev naus laus zis sib txawv tsis sib txawv, yog li txoj kev npaj calibration zoo pib nrog hom ntsuas - thiab nrogvim li castxhua yam tseem ceeb, tsis yog qhov yuav tsum tau kuaj xyuas xwb.

Electromagnetic (Magnetic) Flow Meters

Lub mag meter ntsuas qhov hluav taws xob uas cov kua hluav taws xob tsim tawm thaum nws txav mus los ntawm qhov chaw sib nqus, yog li nws xav tau cov kua dej thiab cov yeeb nkab tag nrho los tsim cov teeb liab siv tau. Txheej ntawm cov electrodes insulates lawv thiab hloov kev nyeem ntawv; tsis zoo grounding cia stray voltage swamp lub me me ntsuas teeb liab; ib qho khoob lossis ib nrab ntawm cov yeeb nkab ua rau qhov ntsuas tag nrho. Ua ntej calibration, paub meej tias grounding, electrode thiab liner mob, thiab ib tug tag nrho cov yeeb nkab - peb daim ntawv rauyog vim li cas grounding tseem ceeb rau lub electromagnetic flow meterpiav qhia txog lub tshuab.

Coriolis Flow Meters

Coriolis meters ntsuas qhov tseeb huab cua ntwslos ntawm qhov sib tw me me uas ntws cov kua dej induces hauv lub vibrating raj, uas ua rau lawv muaj tseeb heev tab sis kuj rhiab rau txhua yam uas cuam tshuam qhov kev co. Kev co sab nraud, yeeb nkab kev ntxhov siab xa mus rau lub sensor, thiab ob-theem (gas-hauv-kua) ntws tag nrho cov teeb liab tsis raug, thiab qhov tsis raug xoom cuam tshuam txhua qhov kev nyeem ntawv. Tshawb xyuas cov teeb meem no ua ntej ntsuas ntsuas, thiab xoom lub ntsuas ntsuas raws li cov chaw tsim khoom tau teev tseg tsis muaj - ntws.

Turbine Flow Meters

Lub turbine meter suav qhov kev sib hloov ntawm lub rotor, yog li txhua yam uas hloov pauv li cas tus rotor spines hloov kev nyeem ntawv. Hnav bearings, khib nyiab, thiab lub rotor puas ntxiv kev sib txhuam los yog qhov tsis sib xws, thiab vim tias cov kabmob sib txawv nrog cov kua dej,hloov viscosity hloov tag nrho cov lus teb nkhaus- uas yog vim li cas lub turbine meter tuaj yeem hla ntawm ib qho chaw ntws tsis tau hla qhov ntau. Tshawb xyuas lub rotor thiab bearings, thiab paub meej tias cov kua dej sib npaug ntawm qhov ntsuas ntsuas ua ntej kuaj.

Ultrasonic Flow Meters

Ultrasonic meters lub sij hawm teeb liab dhau los ntawm cov kua, yog li lub teeb liab lub zog thiab cov yeeb nkab tsis raug tsav qhov tshwm sim. Nrog clamp- ntawm cov qauv kev sib txuas ntawm transducer yog qhov tseem ceeb: qhov sib txawv ntawm huab cua lossis cov gel tsis raug ua rau lub teeb liab tsis muaj zog, thiab txawm tias muaj kev hloov me me hauvtus neeg sawv cev sib txuas tuaj yeem txav qhov ntsuas qhov tseeb. Txheeb xyuas qhov sib txawv ntawm qhov sib txuas, sib txuas, cov khoom siv yeeb nkab, phab ntsa tuab, thiab tias cov yeeb nkab puv ua ntej calibrating.

Differential Pressure Flow Meters

DP flow meter infers ntws los ntawm lub siab poob thoob plaws lub hauv paus ntsiab lus, yog li qhov yuam kev feem ntau yog los ntawm lub siab sab es tsis yog lub caij nws tus kheej. Thaiv los yog xau kab impulse, ib qho xaim xaim xoom xoom, kev teeb tsa tsis ncaj ncees lawm, thiab lub phaj hnav lub ntsej muag tag nrho cuam tshuam cov kev ntsuas dej. Tshawb xyuas cov kab impulse, txheeb xyuas qhovDifferential siab transmitterxoom thiab ntau yam, thiab xyuas cov ntsiab lus tseem ceeb ua ntej kuaj.

Vortex Flow Meters

Lub vortex meter suav qhov ntau zaus ntawm cov vortices tom qab lub cev bluff, uas tsuas yog ua haujlwm thaum cov dej ntws tau ruaj khov thiab qhov kev tshaj tawm siab txaus los tso lub teeb liab huv. Tsawg dhau, kev vibration, lossis tsis txaus khiav ncaj qha ua rau tsis muaj zog lossis tsis muaj suab nrov - saibYuav ua li cas lub vortex meter generates nws cov teeb liabrau lub hauv paus mechanism. Paub meej tias kev vibration, ncaj khiav, sensor mob, thiab hais tias qhov kev khiav hauj lwm txaus nyob rau hauv lub 'meter' qhov pom zoo ntau yam.

Dab tsi los suav nrog hauv Flow Meter Calibration Certificate?

Lub calibration tsis tiav kom txog thaum nws tau sau tseg. Cov ntaub ntawv zoo txhawb nqa kev npaj kho, kev tshuaj xyuas, kev tswj xyuas zoo, thiab kev daws teeb meem - thiab rau kev ua haujlwm tau lees paub, cov ntaub ntawv tiav yog qhov yuav tsum tau ua ntawm ISO/IEC 17025. Daim ntawv pov thawj muaj txiaj ntsig yuav tsum sau tsawg kawg:

• Meter tag naj npawb thiab serial tooj
• Meter hom, qhov loj me, ntau yam, thiab cov zis
• Txheej txheem lossis qhov chaw pabcuam
• Calibration hnub thiab lub npe kws kho mob
• Kev siv tus qauv siv, nws tus lej cim, thiab nws lub sijhawm calibration
• Test kua los yog nruab nrab
• Qhov kub thiab txias, yog tias tsim nyog
• Ntsuas cov ntsiab lus, siv nyeem ntawv, thiab ntsuas ntsuas
• xam yuam kev ntawm txhua qhov chaw
• Raws li - pom thiab raws li - cov txiaj ntsig sab laug
• Txais kev kam rau siab thiab ib daim ntawv qhia meej dhau los lossis tsis ua tiav
• Hloov cov ntsiab lus, yog tias muaj
• Tom ntej no pom zoo calibration hnub

Ib qho piv txwv yooj yim ua rau cov qauv pom tseeb dua li cov npe ntawm thaj chaw. Rau ib lub 'meter' tuav rau ± 1.0% kam rau ua:

Raws li - pom kem qhia tau hais tias lub 'meter' tsis kam ua ntej hloov; raws li - sab laug ua pov thawj tias nws tau rov qab los. Khaws cov ntawv pov thawj qub - ib lub 'meter' uas drifts tib yam kev taw qhia txhua lub voj voog yog qhia koj ib yam dab tsi txog cov txheej txheem, kev teeb tsa, lossis hnav, thiab cov qauv feem ntau muaj txiaj ntsig ntau dua li ib qho txiaj ntsig.

Thaum Yuav Xa Lub Flow Meter mus rau Calibration Lab

Hauv -Kev txheeb xyuas qhov chaw ua haujlwm feem ntau cov xwm txheej niaj hnub, tab sis qee qhov xwm txheej hu rau chav kuaj. Xa lub meter tawm thaum:

• Kev kam rau siab yog nruj dua li koj cov ntaub ntawv siv tau tuaj yeem txhawb nqa
• Kev nyeem ntawv yog xav tau rau kev saib xyuas kev hloov pauv, sau nqi, lossis kev sib cog lus tsis sib haum xeeb
• Ib lub 'meter' tsis ua haujlwm nyob rau hauv daim teb thiab koj tsis tuaj yeem pin down seb qhov txhaum puas yog lub sensor, kev teeb tsa, lossis cov txheej txheem
• Koj xav tau daim ntawv pov thawj lees paub rau kev kuaj xyuas lossis tus tswj xyuas
• Lub 'meter' tau puas lawm, khiav hla nws qhov ntau, lossis kho

Lab calibration nqi ntau dua thiab siv lub meter tawm ntawm kev pabcuam, yog li ntsuas nws tiv thaiv tus nqi ntawm qhov ntsuas thiab tus nqi ntawm qhov tsis raug.

Common Flow Meter Calibration yuam kev

Muaj ntau qhov teeb meem calibration los ntawm kev teeb tsa yuam kev es tsis yog lub 'meter' nws tus kheej. Cov nquag:

• Kuaj tsuas yog ib qho chaw ntws.Ib lub 'meter' tuaj yeem yog qhov tseeb ntawm nruab nrab - ntau yam thiab zoo tawm ntawm qhov qis lossis siab ntws.
• Ignoring installation teebmeem.Lub luj tshib, li qub, twj tso kua mis, thiab reducers cuam tshuam qhov ntws profile thiab kev tsis ncaj ncees qhov tshwm sim.
• Kev siv cov ntaub ntawv tsis tsim nyog.Kev siv yuav tsum yog qhov tseeb dua li qhov ntsuas ntsuas hauv qab ntsuas thiab tsim nyog rau qhov ntws ntau.
• Hla raws li - pom cov ntaub ntawv.Yog tsis muaj nws, koj poob ib qho kev nyeem ntawm drift thiab txheej txheem kev pheej hmoo.
• Kho ua ntej kev daws teeb meem.Yog tias huab cua npuas, tsim, tsis zoo hauv av, lossis cov kab thaiv yog qhov ua rau, kev hloov kho hides qhov teeb meem es tsis txhob kho nws.
• Tsis quav ntsej cov txheej txheem txheej txheem.Kub, siab, viscosity, ntom, conductivity, los yog kua muaj pes tsawg leeg tuaj yeem hloov qhov tshwm sim, nyob ntawm qhov ntsuas.
• Cov ntaub ntawv tsis zoo.Kev ntsuas ntsuas tsis muaj cov ntaub ntawv tsim nyog yog ib qho nyuaj rau kev tiv thaiv hauv kev tshuaj xyuas thiab siv me me rau kev saib xyuas yav tom ntej.

Kev daws teeb meem: Yuav ua li cas yog tias Flow Meter Fail Calibration?

Yog hais tias lub ' meter ' ua tsis tau, tsis txhob xav tias lub 'meter' puas lawm. Ua haujlwm dhau qhov yuav ua rau ua ntej.

Yog tias qhov ua rau tsis meej, tshem lub ntsuas ntsuas rau kev ntsuas ntsuas lossis tiv tauj lub chaw tsim khoom lossis cov kev pabcuam calibration tsim nyog ua ntej muab nws rov qab rau hauv kev pabcuam.

Flow Meter Calibration FAQ

Ntev npaum li cas yuav tsum tau ntsuas ntsuas ntsuas?

Nws nyob ntawm daim ntawv thov. Cov ntsuas ntsuas tseem ceeb yuav xav tau lub sijhawm luv dua, thaum lub ntsuas tsis ruaj khov - ntsuas ntsuas yuav mus ntev dua. Tsim lub sijhawm los ntawm cov chaw tsim khoom kev taw qhia, cov txheej txheem kev pheej hmoo, cov cai, thiab lub ntsuas qhov ntsuas ntawm tus kheej drift keeb kwm es tsis yog tus cwj pwm ruaj khov.

Dab tsi yog qhov txawv ntawm calibration thiab pov thawj?

Kev tshuaj xyuas xyuas seb lub ntsuas puas tseem nyob hauv qhov ua siab ntev thiab tsis hloov dab tsi. Calibration piv cov 'meter' tiv thaiv tus qauv siv thiab sau cov txiaj ntsig. Kev hloov kho yog ib kauj ruam cais, tsuas yog ua tau yog tias lub 'meter' tsis kam lees thiab lub cuab yeej tso cai kho.

Puas tuaj yeem ntsuas ntsuas ntsuas hauv qhov chaw?

Feem ntau, yog. Cov txheej txheem teb xws li kev sib piv tus ntsuas ntsuas lossis hauv - qhov kev txheeb xyuas qhov chaw tso cai rau koj kuaj lub ntsuas ntsuas yam tsis tau tshem tawm, uas yog qhov tseem ceeb rau cov kav dej loj thiab cov kab uas tsis tuaj yeem kaw. Qhov kev txwv yog tias nyob rau hauv - cov txiaj ntsig tau nyob ntawm cov txheej txheem ruaj khov thiab cov ntaub ntawv muaj kev ntseeg siab; rau qhov nruj tshaj plaws tolerances, lub chaw soj nstuam tseem muab qis dua qhov tsis paub tseeb.

Dab tsi yog cov cuab yeej siv los ntsuas qhov ntsuas dej ntws?

Cov khoom tseem ceeb yog cov qauv siv ntau dua li qhov ntsuas hauv qhov ntsuas - feem ntau yog tus ntsuas ntsuas, ntsuas ntsuas ntsuas, lossis gravimetric (hnyav- tank) system, tag nrho nrog siv tau, traceable calibration. Koj tseem xav tau lub teeb liab thiab lub voj ntsuas cov cuab yeej rau lub tshuab xa hluav taws xob, ntxiv rau qhov ntsuas kub thiab ntsuas qhov ntsuas qhov nyiaj them poob haujlwm.

Dab tsi yog qhov ua tau yuam kev rau flow meter calibration?

Txawm li cas los xij koj cov txheej txheem, kev ua haujlwm zoo, kev pom zoo rau cov neeg siv khoom, lossis kev tswj hwm yuav tsum tau - ua qhov nruj tshaj plaws ntawm cov. Lub 'meter' cov ntaub ntawv raug yog ib qho kev tawm tswv yim, tsis yog lus teb. Rau kev ua lag luam thiab kev saib xyuas- hloov daim ntawv thov, cov kev cai raug cai raug cai siv thiab hla kev nyiam sab hauv.

Flow meter calibration nqi npaum li cas?

Nws txawv nrog hom 'meter', txoj kev (qhov kev tshawb xyuas nrawm nrawm dua li qhov ntsuas ntub dej tag nrho), tus naj npawb ntawm cov ntsiab lus xeem, thiab seb koj puas xav tau daim ntawv pov thawj kuaj pom zoo. Raws li txoj cai ntxhib, ntawm - qhov kev txheeb xyuas qhov chaw yog qhov kev xaiv pheej yig tshaj plaws thiab raug lees paub hauv chav kuaj ntsuas qhov kim tshaj plaws. Lub meter technology tseem ceeb heev; rau cov ntsiab lus ntawm yuav ua li cas tus nqi ntaus ntawv sib piv, saib peb lub ntsiab lus ntawmdab tsi tus nqi ultrasonic flow meter.

Puas yog qhuav calibration txaus?

Nws muaj txiaj ntsig zoo rau kev kuaj xyuas cov khoom siv hluav taws xob thiab cov teeb liab tso tawm, tab sis nws tsis kuaj lub sensor hauv qab dej tiag. Rau kev ntsuas qhov tseem ceeb, kev ntsuas ntub dej lossis kev sib piv rau cov qauv siv ntws yog qhov tseem ceeb dua.

Vim li cas - pom cov ntaub ntawv tseem ceeb?

Raws li - pom cov ntaub ntawv qhia tau hais tias lub ntsuas ntsuas tau ua li cas ua ntej kev hloov kho. Nws yog qhov tso cai rau koj ntsuas drift, txiav txim siab cov txheej txheem kev pheej hmoo, thiab txiav txim siab seb lub sijhawm ntsuas ntsuas yuav tsum hloov pauv.

Xaus

Calibrating ib tug flow meter yog tsawg dua li tig ib tug xov tooj ntawm ib tug transmitter thiab ntau ntxiv txog ib tug kev qhuab ntuas ib theem zuj zus: xaiv ib txoj kev uas haum rau qhov raug thiab nkag tau rau koj muaj, npaj cov 'meter' thiab siv kom raug, xeem sensible ntsiab lus, xam yuam kev tiv thaiv ib tug kam rau siab koj tiv thaiv, ntaub ntawv raws li - pom thiab raws li - sab laug cov ntaub ntawv, thiab tsis muaj dab tsi ntxiv.

Rau kev pabcuam niaj hnub, cov txheej txheem meej thiab cov ntaub ntawv zoo feem ntau yog txaus. Rau kev tswj xyuas qhov tseem ceeb, kev ua tau zoo, kev nyab xeeb, lossis kev saib xyuas - hloov kev ntsuas, siv cov ntaub ntawv tshawb nrhiav thiab kev txhawb nqa uas tau lees paub. Thiab thaum ib lub 'meter' cia drifting los yog ua tsis tiav, saib cov 'meter' hom, kev teeb tsa, thiab cov txheej txheem ua ntej ncav cuag kev hloov kho - qhov laj thawj tiag tiag feem ntau yog cov khoom siv hluav taws xob. Yog tias koj sib piv ib lub 'meter' rau ib daim ntawv thov nyuaj hauv thawj qhov chaw, peb pab neeg tuaj yeem pab tau; tshawb xyuas pebNtau yam ntawm ultrasonic, electromagnetic, vortex, thiab turbine flow meterspib.