Cov lus ceeb toom ua haujlwm tseem ceeb ntawm Gas Detectors
1. Rau kev siv lub cuab yeej zoo dua, thov ua tib zoo nyeem phau ntawv qhia ua ntej siv.
2. Ua ntej kev sim, lub sij hawm preheating ntawm qhov ntsuas no yuav tsum tau tswj kom tsim nyog. Piv txwv li, yog tias muaj kev thov siab rau cov txiaj ntsig thaum nws tsis tau siv ntau tshaj 2 teev, nws raug nquahu kom preheat rau 15 feeb.
Yog tias lub roj teeb qis dua 40%, nws raug nquahu kom them nws rau kev siv thaum muaj xwm txheej ceev.
4. Qhov ntsuas no yog nruab nrog PTFE sampling raj. Yog tias muaj plua plav ntau, nws raug nquahu kom siv lub raj xa dej nrog cov plua plav lim tso rau hauv cov cua nkag (sab laug nozzle). Txwv tsis pub, nws tsis pom zoo kom siv lub raj xa dej nrog lub lim; Lub qhov hluav taws xob cua tuaj yeem txuas nrog lub trachea raws li qhov xwm txheej.
5. Tom qab kuaj pom cov pa phem thiab cov pa phem, nws yuav tsum tau nkag mus rau hauv hom kev tshawb nrhiav dua hauv qhov chaw huv si kom pom cov roj kom txog thaum cov concentration ntawm ntau yam tshuaj lom thiab teeb meem gases rov qab mus rau 0ppm, thiab txuas ntxiv rau ntau tshaj 1 feeb ua ntej kaw thiab muab tso rau hauv lub thawv ntsuas.
6. Qhov zoo tshaj plaws ua hauj lwm kub rau feem ntau sensors yog 20 degrees Celsius, yog li thaum siv nyob rau hauv qis - qhov kub thiab txias ib puag ncig, lub sensor teb yuav qeeb dua li ib txwm, tshwj xeeb tshaj yog rau semiconductor sensors xws li tsw sensors, uas yuav tsum tau ib tug ntev preheating lub sij hawm thiab ib tug tej yam kub thiab txias los xyuas kom meej.
Nyob rau hauv ib puag ncig nrog cov av noo siab (ntau dua 65% RH), cov teeb liab sensor feem ntau yog tsis ncaj ncees lawm.
