I. Ua ntej-Kev Npaj Ua Ntej: Ua kom muaj kev ua raws li ib puag ncig thiab khoom siv
Thawj kauj ruam hauv calibration yog tsim kom muaj qhov chaw ruaj khov thiab tswj tau qhov chaw sim rau lub sensor.
Kev ua haujlwm yuav tsum tau ua nyob rau hauv ib puag ncig nrog qhov kub ntawm 15 txog 25℃thiab qhov txheeb ze av noo tsis tshaj 85% RH. Muaj zog electromagnetic cuam tshuam (RF cuam tshuam kev siv zog<1V/m) and mechanical vibration (acceleration <0.001g) should be avoided. If necessary, an active vibration isolation platform should be used to reduce external disturbances.
Cov cuab yeej siv tau ntawv pov thawj los ntawm lub teb chaws metrology lub tsev kawm ntawv yuav tsum tau, suav nrog tus qauv ntsuas nrog qhov tseeb ib qho kev txiav txim siab siab tshaj qhov ntsuas qhov ntsuas tau ntsuas, tus qauv teeb liab lub tshuab hluav taws xob muaj peev xwm ua tau raws li lub cev kom muaj nuj nqis cov cim, thiab cov roj hluav taws xob nrog cov ntawv pov thawj traceable (xws li 1.0% CH₄ calibration sib tov).
Nyob rau tib lub sijhawm, kev ruaj ntseg ntawm lub cev muaj kev nyab xeeb yuav tsum raug kuaj xyuas: Paub meej tias qhov tawg - cov cim pov thawj (xws li Ex ib I) ntawm lub sensor nameplate yog qhov tseeb thiab siv tau, lub casing tsis raug puas tsuaj thiab zoo - kaw, connectors tsis xoob los yog oxidized, thiab xyuas kom meej tias nws yog haum rau qhov chaw nyab xeeb barrier. Lub voj tsis sib xws yuav tsum ua tau raws li qhov yuav tsum tau ua xws li Uo Tsawg dua lossis sib npaug Ui thiab Co Ntau dua lossis sib npaug ntawm Ci + Cc.
II. Calibration Implementation: Kev khiav hauj lwm yog categorized los ntawm sensor hom.
Gas Sensor Calibration (Nqa lub methane sensor ua piv txwv)
Muaj feem xyuam rau intrinsically muaj kev nyab xeeb cov cuab yeej tshawb nrhiav roj xws li catalytic combustion thiab thermal conductivity sensors.
Ua ntej, ua xoom-point calibration: Preheat lub sensor hauv huab cua tshiab rau 20 feeb. Tom qab kev nyeem ntawv ruaj khov, siv cov chaw taws teeb tswj kom nkag mus rau hauv cov ntawv qhia zaub mov thiab xaiv "Xoom-point Calibration" muaj nuj nqi, kho tus nqi tso tawm rau 0.00% CH₄.
Tom ntej no, ua qhov tseeb calibration: Qhia tus qauv roj uas paub txog concentration (piv txwv li, 1.0% CH₄). Tom qab nyeem ntawv stabilizes, kho qhov rhiab heev uas siv cov chaw taws teeb tswj lossis lub khoos phis tawj tswj hwm lub khoos phis tawj kom ntseeg tau tias tus nqi tso tawm sib tw nrog cov qauv roj concentration.
Thaum kawg, ua lub tswb ntsuas qhov ntsuas: Teem lub tswb ntsuas (piv txwv li, 1.0% CH₄), thiab rov pib cov qauv roj kom paub tseeb tias lub tswb nrov thiab pom kev ua kom raug. Yog hais tias qhov tseeb calibration ua tsis tiav, lub ntsiab catalytic tej zaum yuav "poisoned" los yog hnub nyoog, yuav tsum tau hloov lub rhiab ntsiab.
Calibration of Physical Quantity Sensors xws li Kub / Pressure / Level: Static yam ntxwv calibration yog ua los ntawm kev siv lub teeb liab tawm tswv yim. Feem ntau, tsib qhov sib npaug sib npaug ntawm cov ntsiab lus raug xaiv, suav nrog 10% txog 90% ntawm qhov ntsuas ntau. Rau siab - cov ntawv thov zaus (piv txwv li, cov ntsuas ntsuas siab nrog qhov ntau ntawm 0-70%), cov ntsiab lus ntsuas ntsuas yuav tsum tau sib nrug ntau dua, nrog cov ntu tsis pub tshaj 5% ntawm tag nrho cov nplai.
Piv txwv li, rau intrinsically muaj kev nyab xeeb kub sensors, ib tug tas li kub da dej yuav siv tau los muab peb tus qauv kub qhov chaw: 0 degree, 50 degree, thiab 100 degree. Cov zis tsis kam lossis cov teeb liab tam sim no tuaj yeem ntsuas tau, thiab qhov sib txawv ntawm qhov tso zis tiag tiag thiab tus nqi theoretical tuaj yeem xam. Kev kho tuaj yeem ua tiav los ntawm kev hloov kho kho vajtse lossis software them nyiaj.
Ceev Sensor Calibration (piv txwv li, GS4(A) hom)
Siv tus qauv tachometer los simulate txoj siv txoj kab nrawm (piv txwv li, 1.5m / s, 2.5m / s, 3.5m / s) txhawm rau txheeb xyuas cov qib sensor tso tawm: Thaum lub sijhawm ua haujlwm ib txwm, cov zis yuav tsum siab (Ntau dua lossis sib npaug rau 11V); Thaum qhov ceev qis dua 50% lossis siab dua 110% ntawm cov nqi teev, nws yuav tsum tam sim ntawd hloov mus rau qis (tsawg dua lossis sib npaug rau 0.5V).
Tsis tas li ntawd, xyuas tus kheej - khawm kuaj thiab qhov ua txhaum qhov taw qhia lub teeb ua haujlwm kom ntseeg tau tias cov txheej txheem tiv thaiv zoo.
III. Ncej -Calibration Processing: Xyuas kom cov ntaub ntawv Traceability
Tom qab calibration, cov tsis tshiab yuav tsum tau sau rau lub cim xeeb sensor ntawm tej thaj chaw deb tswj los yog configuration software; txwv tsis pub, cov chaw yuav ploj tom qab fais fab tuag.
Daim ntawv qhia txog kev ntsuas kom tiav yuav tsum tau tsim, suav nrog hnub calibration, ib puag ncig, qauv thiab tus naj npawb ntawm cov khoom siv siv, kev sib piv ntawm cov ntaub ntawv ua ntej thiab tom qab calibration, thiab seb nws ua raws li cov kev cai ntawm GB/T 13919-2008 lossis JJF1059.1, thiab lwm yam.
Sau ib daim ntawv calibration - tsim nyog daim ntawv lo rau lub sensor vaj tse, qhia hnub tim ntawm qhov calibration no thiab lub sij hawm ntawm lub calibration tom ntej, thiab hloov kho cov khoom ledger ib txhij. Muab cov cuab yeej siv rau hauv kev lag luam ERP lossis EAM system rau kev tswj xyuas ib ntus kom ua tiav tag nrho traceability.
