Cov txheej txheem tseem ceeb rau kev txiav txim siab seb lub platinum resistor yuav tsum tau kho yog siv lub multimeter los ntsuas nws tus nqi tiv thaiv, saib xyuas nws qhov kev hloov pauv, thiab tshuaj xyuas nws lub cev. Los ntawm kev sib piv cov kev tshawb pom no tawm tsam tus qauv siv qhov tseem ceeb, ib tus tuaj yeem paub meej tias muaj qhov tsis raug xws li qhib circuits, luv circuits, los yog tsis kam drift.
Kuv. 4 Cov kauj ruam tseem ceeb los txiav txim siab yog tias Platinum Resistor Yuav Tsum Kho
1. Kev soj ntsuam pom (Kev ntsuam xyuas ua ntej)
Tshawb xyuas lub tsho tiv thaiv kom pom tias muaj kev puas tsuaj, deformation, corrosion, lossis dej nkag.
Tshawb xyuas lub taub hau ntawm lub davhlau ya nyob twg (lub thawv sib txuas) rau cov dej stains, oxidation, xoob xaim, lossis hlawv cov cim.
Yog tias pom pom kev puas tsuaj rau lub cev, feem ntau nws tuaj yeem txiav txim siab tam sim ntawd tias chav tsev yuav tsum tau kho lossis hloov pauv.
2. Kev ntsuas ntsuas (Core Assessment)
Siv multimeter teeb rau qhov tsis kam (feem ntau yog 200Ω lossis 2kΩ ntau) txhawm rau ntsuas qhov tsis kam ntawm cov hlau lead:
3-Wire Platinum Resistor (Feem ntau):
Ntsuas ntawm A-B thiab A-C: Qhov ntsuas qhov ntsuas yuav tsum yog kwv yees li sib npaug thiab sib haum rau tus qauv tus nqi rau qhov ntsuas kub tam sim no (piv txwv li, kwv yees li 109.73Ω ntawm 25℃).
Ntsuas ntawm B-C: Tus nqi tiv thaiv yuav tsum nyob ze rau 0Ω ( sawv cev rau cov nyiaj them poob haujlwm).
Yog tias qhov kev nyeem ntawv tsis kam ntawm A-B lossis A-C qhia "OL" (qhib qhov kev tiv thaiv tsis kawg / qhib Circuit Court), nws txhais tau tias lub platinum xaim tawg, thiab chav tsev yuav tsum tau kho.
Yog tias tus nqi tiv thaiv qis dua tus nqi tus qauv (piv txwv li, ze rau 0Ω), nws qhia tau hais tias ib qho luv luv Circuit Court, thiab chav tsev yuav tsum tau hloov.
2-Wire Platinum Resistor:
Ncaj nraim ntsuas qhov tsis kam ntawm ob txoj hlua hlau los txiav txim siab seb qhov kev nyeem ntawv poob rau hauv cov qauv siv tau.
Daim Ntawv Pov Thawj (PT100):
0℃→ 100.00Ω
20℃→ 107.79Ω
25℃→ 109.73Ω
100℃→ 138.51Ω
Yog tias qhov ntsuas tus nqi poob hauv ± 0.5Ω ntawm tus qauv siv tus nqi, nws feem ntau suav hais tias ua haujlwm ib txwm.
3. Temperature Response Test (Dynamic Verification)
Tuav lub ntsuas qhov ntsuas ntawm koj txhais tes, lossis maj mam ua kom sov nws siv lub teeb (kev saib xyuas kom tsis txhob kub hnyiab lossis overheating lub sensor).
Ua tib zoo saib lub multimeter zaub kom paub meej tias tus nqi kuj nce siab. Yog tias tus nqi tiv thaiv tseem tsis hloov pauv lossis hloov pauv hnyav, nws qhia tau tias platinum hlau tau muaj hnub nyoog, dhau los ua paug, lossis raug kev puas tsuaj los ntawm hluav taws xob; nws yuav tsum tau kho los yog hloov.
4. Insulation Resistance Testing (rau siab -Cov ntawv thov Precision)
Siv lub ntsuas hluav taws xob tiv thaiv hluav taws xob, txuas ib qho ua rau lub ntsuas hluav taws xob tso tawm thiab lwm qhov rau lub raj tiv thaiv.
Lub rwb thaiv tsev tiv thaiv yuav tsum siab dua lossis sib npaug ntawm 20 MΩ (ntawm chav tsev kub); tus nqi qis dhau yuav ua rau muaj teeb meem cuam tshuam thiab cuam tshuam kev ntsuas qhov tseeb.
II. Cov Lus Qhia Tsis Zoo thiab Kho Kho
|
Fault Symptom |
Multimeter nyeem ntawv |
Kho tau |
Kev piav qhia |
|
Qhib Circuit |
OL (Infinity) |
Kho tau |
Lub platinum hlau tawg tuaj yeem kho tau siv 6-8V arc vuam. |
|
Luv Circuit Court |
0 Ω lossis Tus Nqi Tsawg heev |
Qhov xwm txheej |
Sab hauv dej tuaj yeem daws tau los ntawm kev ziab; rwb thaiv tsev puas yog qhov nyuaj rau kho. |
|
Kuj Siab Heev |
Saum tus nqi tsim nyog |
Kev daws teeb meem |
Feem ntau tshwm sim los ntawm kev sib cuag tsis zoo nyob rau hauv cov hlau lead; ntxuav thiab rov txuas cov hlau lead. |
|
Kuj Tsawg heev |
Hauv qab tus nqi tsim nyog |
Hloov Chav |
Ua los ntawm platinum hlau kis kab mob los yog ib qho chaw luv luv Circuit Court; kho muaj kev pheej hmoo siab. |
|
Sluggish teb |
Tsis muaj kev hloov pauv lossis qeeb qeeb thaum cua sov |
Qhov xwm txheej |
Tej zaum yuav qhia txog kev laus rwb thaiv tsev; kev calibration yog pom zoo. |
Tswv Yim Qhia Txog Kev Ua Haujlwm: Tus ntsuas kub platinum kho tau yuav tsum tau rov qab- ntsuas thiab ntsuas qhov ntsuas ua ntej muab rov qab rau hauv kev pabcuam, kom paub tseeb tias qhov tseeb thiab kev ntseeg tau.
