I. Txheej txheem cej luam ntawm Explosion Protection Certification
Qhov zoo ntawm cov khoom tawg-pov thawj ncaj qha cuam tshuam rau kev lag luam kev nyab xeeb. Feem ntau lub teb chaws thiab cheeb tsam thoob plaws ntiaj teb tau koom nrog cov khoom pov thawj tawg pov thawj rau hauv pawg tswj hwm. Tam sim no cov ntaub ntawv pov thawj tiv thaiv hluav taws xob tawg tau poob rau hauv plaub pawg loj: IECEx daim ntawv pov thawj (International Electrotechnical Commission), European Union ATEX ntawv pov thawj, Lavxias teb sab 012 explosion-proof certification, thiab Suav teb tawg pov thawj system.
Daim ntawv pov thawj tiv thaiv tawg rau lub siab sensor yog cov ntaub ntawv raug tso tawm los ntawm lub tebchaws tau lees paub, lees paub tias lub sensor tau raug sim thiab yuav tsis tsim qhov hluav taws xob tsis muaj hluav taws kub lossis hluav taws kub ib puag ncig, thiab tuaj yeem siv nyab xeeb hauv qhov chaw muaj kev phom sij.
II. Common Explosion Protection Hom rau Pressure Sensors
1. Intrinsically Safe Type Ex i (ia/ib)
Qhov no yog hom kev nyab xeeb feem ntau siv los ntawm sab hauv. Los ntawm voltage-limiting thiab tam sim no-limiting circuit designs, lub zog hluav taws xob sab hauv yog khaws cia nyob rau hauv ib tug tsawg kawg nkaus theem. Txawm hais tias lub tshuab hluav taws xob luv luv lossis ua haujlwm tsis zoo, nws tsis tuaj yeem tsim cov nplaim taws, thiab nws qhov kub thiab txias ntawm qhov chaw tseem nyob qis dua qhov tseem ceeb ntawm qhov hluav taws kub.
Qhov zoo: Txhawb nqa kev ua neej nyob, kev cog lus me me, kev siv nyiaj ntau
Common marking example: Ex ia IIC T6 Ga, Ex ib IIC T4 Gb
2. Flameproof Hom Ex d
Hom no siv lub zog muaj zog, thickened hlau enclosure. Txawm hais tias muaj kev tawg hauv sab hauv, cov ntaub thaiv npog yuav tsis tawg, muaj cov nplaim hluav taws xob sab hauv thiab lub zog nthwv dej thiab tiv thaiv qhov hluav taws kub ntawm cov hluav taws xob sab nraud.
Cov cim cim piv txwv: Ex d IIC T6 Gb
III. Khoom Taw Qhia
PA600 series siab sensor nruj me ntsis ua raws li lub teb chaws tus qauv GB / T 3836.1-2021 Explosive atmospheres - Ntu 1: Cov kev cai dav dav rau cov khoom siv thiab GB / T 3836.4-2021 Explosive atmospheres - Ntu 4: Cov cuab yeej tiv thaiv los ntawm kev nyab xeeb ntawm sab hauv "i". Nws tau raug tshuaj xyuas thiab kuaj los ntawm lub teb chaws lub chaw soj ntsuam kev tiv thaiv tawg thiab tau txais daim ntawv pov thawj tiv thaiv tawg.
Cov khoom no siv lub diffusion silicon siab sensing caij raws li nws cov ntsiab lus ntsuas. Tom qab amplification los ntawm ib tug tshwj xeeb teeb liab txias Circuit Court, lub on-site siab teeb liab yog hloov dua siab tshiab rau hauv ntau yam qauv hluav taws xob teeb liab. Tus nqi siab muaj qhov tseeb linear kev sib raug zoo nrog cov zis hluav taws xob teeb liab, ua tiav qhov ntsuas siab qhov tseeb hauv qhov chaw ua haujlwm.
Chav tsev yog nyob rau hauv tag nrho-stainless-steel encapsulated qauv, muab kev ua haujlwm ruaj khov thiab muaj zog tiv thaiv ib puag ncig. Nws yog dav siv nyob rau hauv cov txheej txheem ntsuas siab thiab tsis siv neeg tswj kev siv hauv kev lag luam xws li roj & roj, tshuaj, metallurgy, hluav taws xob, thiab hydrogeology.
IV. Cov khoom tseem ceeb Parameter
| Qauv | Cov khoom siv hluav taws xob | Siab Ntau | Kev tiv thaiv ntsuas | Explosion Protection Marking |
|---|---|---|---|---|
| PAB 600 | DC 5 V | 0 ~ 40MPa | IP65 | Ex ib IIC T4 Gb |
V. Hluav taws xob Terminal txhais
| Pin No. | Txhais |
|---|---|
| 1 | V + (Power mov zoo) |
| 2 | GND (hauv av) |
| 3 | 0+ (Signal output positive) |
VI. Intrinsically Safe System Wiring thiab Parameter Matching
1. System Architecture
Qhov chaw muaj phom sij: Explosion-proof pressure sensor (Ex ib IIC T4 Gb)
Safe Area: Intrinsic Safety Barrier
Ob qhov sib xyaw ua ke ua ib qho kev ntsuas kev nyab xeeb hauv lub cev.
2. Qhov tseem ceeb Intrinsically Safe Parameters
Siab Sensor Parameters:Ui=6 V DC, Ii=505 mA, Pi=750 mW, Ci=1 μF, Li=0 mH
Intrinsic Safety Barrier Parameters:Um=250 V AC/DC, Uo=6 V DC, Io=505 mA, Po=750 mW
3. Cov kev cai sib txuam rau Intrinsically Safe Parameters
Thaum xaiv lub cable ntawm qhov barrier thiab sensor, yuav tsum tau ua raws li cov cai hauv qab no: Uo Tsawg dua lossis sib npaug Ui, Io Tsawg dua lossis sib npaug rau Ii, Po Less dua lossis sib npaug rau Pi, Cc Tsawg dua lossis sib npaug Co – Ci, Lc Tsawg dua lossis sib npaug rau Lo – Li
Parameter txhais:
Cc , Lc : Qhov siab tshaj plaws kev faib tawm thiab kev faib tawm inductance tso cai rau cov kab hluav taws xob ntawm qhov thaiv thiab lub sensor
Co , Lo : Qhov siab tshaj plaws sab nraud capacitance thiab siab tshaj plaws sab nraud inductance tso cai los ntawm kev thaiv
Uo , Io , Po : Maximum output voltage, siab tshaj plaws tso zis tam sim no, thiab siab tshaj plaws tso zis hwj chim ntawm lub barrier
Ui , Ii , Pi : Qhov siab tshaj plaws tso zis voltage, input tam sim no, thiab input zog ntawm lub sensor
Ci, Li: Internal inherent capacitance thiab inductance inductance ntawm lub sensor
VII. Cov yam ntxwv ntawm cov khoom
Lub tsev ntawm no series ntawm siab sensors yog tsim los ntawm stainless hlau tuag-casting tshuab, ua tau raws li qhov yuav tsum tau muaj zog thiab mechanical zog yuav tsum tau teev nyob rau hauv lub teb chaws cov qauv thiab cov khoom specifications. Internal creepage nrug thiab clearances ua raws li kev tiv thaiv tawg raws li tus txheej txheem, kom ntseeg tau tias muaj kev ruaj ntseg rwb thaiv tsev kev ua tau zoo thiab hluav taws xob kev nyab xeeb.
VIII. Installation thiab siv Specifications
Qhov siab tsis tshaj 2000 m; ambient atmospheric siab: 80-110 kPa
Ambient khiav hauj lwm kub: 0 degree rau +80 degree
Ambient txheeb ze av noo: Tsawg dua los yog sib npaug rau 95% (ntawm 25 degree)
Tsim nyog rau cov pa cua tawg: Chav kawm IIA rau IIC, Pawg T1 txog T4 qhov chaw uas muaj roj combustible
Qhov chaw teeb tsa tsis muaj qhov tseem ceeb ntawm kev siv tshuab oscillation, poob siab, lossis muaj zog vibration
Tsis muaj corrosive gases tsim kev puas tsuaj rau cov ntaub ntawv insulating nyob ib puag ncig
Tsis muaj kev pheej hmoo ntawm cov dej ntws los yog kua dej rau ntawm qhov chaw teeb tsa
Kev ua qias tuaj hauv tsev: Qib 3
IX. Kev khaws cia thiab kev thauj mus los
Cov khoom yuav tsum tau muab cia rau hauv qhov chaw zoo, qhuav, huv warehouse, tsis txhob ntub los yog corrosive ib puag ncig.
Thaum lub sij hawm kev thauj mus los, kev tiv thaiv txaus yuav tsum tau muab los tiv thaiv los nag, kev vibration hnyav, thiab kev cuam tshuam.
Xav tau lub tshuab hluav taws xob tawg-pov thawj rau koj qhov chaw muaj kev phom sij?
Lub PA600 series muaj kev ruaj ntseg kev ruaj ntseg (Ex ib) thiab flameproof (Ex d) kev xaiv, tau ntawv pov thawj rau cov qauv thoob ntiaj teb thiab lub teb chaws. Tiv tauj peb hnub no rau cov kws tshaj lij cov lus qhia thiab kev daws teeb meem rau koj daim ntawv thov.
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