Yuav Ua Li Cas Ntsuam Xyuas Kev Ruaj Ntseg ntawm Sheathed Platinum Resistance Meters

Kev ntsuam xyuas qhov ua tau zoo ntawm cov khoom siv hluav taws xob ntawm cov platinum tiv thaiv ntsuas yog ib kauj ruam tseem ceeb hauv kev ua kom lawv ua haujlwm zoo hauv cov chaw lag luam uas muaj qhov kub thiab txias, cov av noo siab, thiab cov ntaub ntawv corrosive. Kev puas tsuaj ntawm rwb thaiv tsev tuaj yeem ua rau kev ntsuas drift, teeb liab cuam tshuam, thiab txawm tias sensor tsis ua haujlwm. Qhov no yog vim li cas nws yog ib qho tseem ceeb rau kev sim tsis tu ncua siv cov kev pom zoo. Raws li cov qauv kev lag luam, cov hauv qab no yog cov txheej txheem kev soj ntsuam zoo thiab cov ntsiab lus tseem ceeb:




I. Npaj rau Kev Xeem: Ua kom qhov ntsuas tau raug



Kev Tswj Ib puag ncig: Kev sim yuav tsum tau ua nyob rau hauv qhov chaw qhuav thiab tsis muaj plua plav kom cov ntawv nyeem tsis cuam tshuam los ntawm ya raws lossis av ntawm qhov chaw. Qhov kub zoo tshaj plaws rau chav tsev yog nyob nruab nrab ntawm 15 txog 35 degrees Celsius, thiab cov av noo yuav tsum tsawg dua 75%.



Ua ntej siv lub megohmmeter, ua tus kheej - kuaj thiab ntsuas ntsuas kom paub tseeb tias cov zis hluav taws xob nyob ruaj khov (feem ntau DC 500V) thiab qhov ntsuas qhov tseeb yog qhov zoo txaus.



Kev lees paub ntawm Kev Ntsuas Cov Txheej Txheem: Lub encased platinum resistance meter yuav tsum nyob ntawm qhov kub thiab txias. Tsis txhob sim tam sim tom qab qhov kub hloov pauv ntau. Txhawm rau tshem tawm cov peev txheej thermoelectric thiab seem seem cuam tshuam, nws yog qhov zoo tshaj kom cia nws zaum hauv qhov chaw nrog qhov kub thiab txias li 30 feeb.







II. Standard Test Method: Siv lub megohmmeter los ntsuas



Yuav ua li cas Hlau



Txuas ob lub taub hau ntawm armored platinum tiv thaiv tus pas ntsuas kub mus rau "L" davhlau ya nyob twg (kab davhlau ya nyob twg) ntawm megohmmeter los ntawm luv luv -circuiting lawv.



Txuas lub tes tsho hlau uas tiv thaiv cov xov hlau mus rau "E" davhlau ya nyob twg (hauv av davhlau ya nyob twg).



Nco ntsoov tias muaj kev sib cuag zoo heev thiab tsis muaj roj lossis oxidation uas tuaj yeem cuam tshuam cov conductivity.



Muab tso rau ntawm qhov ntsuas hluav taws xob



Tig lub megohmmeter thiab muab 500V DC voltage rau ib feeb. Tau txais qhov ruaj khov rwb thaiv tsev tus nqi. Qhov hluav taws xob no ua rau muaj txiaj ntsig zoo rau txoj kev xau yam tsis muaj kev puas tsuaj rau cov khoom siv insulating.



Cov Qauv rau Txais



Standard Industrial Environment: Rwb thaiv tsev kuj yuav tsum yog tsawg kawg yog 100 MΩ.



Cov ntawv thov uas xav tau siab, xws li lub zog nuclear thiab tshuaj, xav tau kev tiv thaiv kev tiv thaiv tsawg kawg yog 500 MΩ.



Yog tias qhov ntsuas tsawg dua 10 MΩ, nws txhais tau hais tias cov rwb thaiv tsev tau raug puas tsuaj loj thiab cov dej tuaj yeem nkag mus, kev sib kis tau tshwm sim, lossis cov khoom yuav muaj hnub nyoog.



Txuj Ci Txuj Ci: IEC 60751 tus qauv hais tias lub platinum tiv thaiv tus pas ntsuas kub lub rwb thaiv tsev yuav tsum yog tsawg kawg 100MΩ thaum ntsuas ntawm 500VDC kom paub tseeb tias nws nyob ruaj khov nyob rau lub sijhawm.







III. Tej yam tseem ceeb uas cuam tshuam rau kev xeem thiab kev ntsuas kev nyab xeeb



Kev Tiv Thaiv Cov Ntog thiab Dej: Yog tias qhov saum npoo ntawm cov hlua armored muaj roj, ntsev, lossis cov dej noo ntawm nws, cov txheej txheem txheej yuav tsim, uas yuav ua rau qhov kev tiv thaiv qis dua li qhov tiag tiag. Ua ntej kev sim, koj yuav tsum so qhov chaw nrog dej cawv thiab tawm hauv qhov chaw qhuav rau ib ntus.



Kev kho cov hlau lead thiab lub thawv sib txuas: Txhawm rau kom tsis txhob muaj cov kab sib txuas uas cuam tshuam rau qhov kev ntsuas qhov ntsuas, qhov ntsuas thib ob yuav tsum tau muab tshem tawm thaum kuaj. Yog hais tias muaj cov terminal blocks nyob rau hauv lub junction box, lwm yam circuits yuav tsum tau muab cais.



Temperature Compensation: Raws li qhov kub thiab txias, cov rwb thaiv tsev tsis kam poob. Yog tias kev sim ua tiav hauv qhov chaw kub, qhov kub ntawm chav tsev yuav tsum tau sau cia thiab suav nrog hauv daim ntawv tshaj tawm. Yog tias tsim nyog, kho cov ntaub ntawv yuav tsum tau ua.



Txhawm rau kuaj xyuas qhov rov ua tau zoo, nws yog qhov zoo tshaj los ntsuas ob lub sijhawm sib txawv. Yog tias qhov txiaj ntsig sib txawv ntau dua 10%, koj yuav tsum xyuas lub xeev kev sib cuag lossis kev ruaj ntseg ntawm cov khoom siv.







IV. Yuav Ua Li Cas thiab Tswj Cov Ncauj Lus Tom Qab Kev Xeem:



Yog tias qhov kev xeem dhau, nws yuav tsum tau sau npe kom tsim nyog, cov txiaj ntsig yuav tsum tau sau tseg, thiab qhov kev xeem yuav tsum tau muab tso rau hauv cov ntaub ntawv kho cov cuab yeej.



Yog tias nws tsis ua haujlwm, koj tuaj yeem sim cov kev kho hauv qab no:



Siv cov cawv cawv los ntxuav qhov chaw thiab sim dua.



Txhawm rau tshem tawm cov dej noo hauv, ci hauv qhov cub ntawm 150 degrees rau 2 mus rau 4 teev. Ces cia nws txias thiab sim dua.



Yog tias nws tseem tsis ua haujlwm, cov txheej txheem rwb thaiv tsev sab hauv tau tawg, thiab lub sensor yuav tsum tau hloov.



Kev Ua Lag Luam Kev Ua Lag Luam: Nws yog qhov zoo tshaj plaws los ua qhov kev ntsuas hluav taws xob tiv thaiv txhua rau lub hlis kom pom tias cov khoom hloov pauv li cas thiab mus ntawm "passive hloov" mus rau "kev saib xyuas kwv yees."