Yuav ua li cas kom raug paub qhov txawv ntawm thermocouples thiab thermal resistors?

Coob tus neeg tsis meej pem thaum saib RTDs thiab thermocoes. Muaj zoo li tsis muaj qhov sib txawv ntawm lawv. Lawv cov tsos yuav luag zoo li qub, thiab txij li ob qho tib si siv los ntsuas kub, nws yuav nyuaj rau lawv kom lawv sib nrug! Qhov tseeb, txawv ntawm RTDs thiab thermocots yog yooj yim heev. Txhawm rau pab koj kom meej dua qhov txawv ntawm lawv, cov cuab yeej ua kom pom tseeb yuav piav qhia yuav ua li cas thiaj paub qhov txawv ntawm RTDs thiab thermoounles los ntawm peb yam.

1. Pom qhov txawv ntawm kev kawm tiav

1. Kev Nkag Npe Xwm: RTDs yog cov khoom tiv thaiv. Kev hloov pauv hauv qhov kub ua rau lawv los tsim cov kev hloov zoo lossis tsis zoo ntawm kev tiv taus. Thermocouples, ntawm qhov tod tes, ntxias cov kev hloov pauv hauv voltage, uas sib txawv nrog kub.

2. Ob lub sensors muaj cov kub sib txawv. RTDS feem ntau tshawb xyuas qhov kub ntawm 0 - 150 surch (txawm hais tias lawv tseem tuaj yeem tshawb xyuas qhov tsis zoo kub ntawm 0}}}} 1000℃(thiab siab dua). Yog li ntawd, cov qub yog rau kev kuaj ntsuas qis, thaum tom kawg yog rau kev kuaj kom kub siab.

3. Nyob rau hauv cov nqe lus, lub thermal resistor yog cov khoom siv hlau nrog cov khoom siv kub, muaj cov khoom siv sib txawv uas tsim cov peev xwm sib txawv ntawm lawv qhov kawg vim qhov ntsuas kub.

4. Lub tswv yim modules rau PLCS kuj txawv rau thermal resistors thiab thermoounce. Cov lus no yog qhov tseeb, tab sis plcs feem ntau lees txais 4-20 ma cov cim ncaj qha, thaum thermal resistors thiab thermal resesors thiab thermal resistors thiab thermal resistors thiab thermal resectors thiab thermal resectors thiab thermal resuctors thiab thermal resistors thiab thermal resectors thiab thermal resistors thiab thermal resistors thiab thermical resistors thiab thermal resectors thiab thermal resistors thiab thermal resectors thiab thermal resistors thiab thermal resectors thiab thermal resectors thiab thermal resistors thiab thermal resuctors Yog tias txuas nrog DCS, lub transmitter tsis tsim nyog! Thermal Yuam siv RTD cov cim, thaum thermorot siv TC lub cim!

5. Thermoroces tuaj rau hauv J, T, N, K, thiab s s thiab. Ib txhia yog kim dua li resistors, thaum lwm tus pheej yig dua. Txawm li cas los xij, thaum them nyiaj feem xyuam nrog, tag nrho cov nqi ntawm thermocouples yog siab dua. Thermal tsim tawm siv cov paib tiv thaiv, thaum thermorouples siv cov cim ntsuas hluav taws xob.

6. Kev ntsuas cua sov ntsuas yog ua raws cov cuab yeej uas tsis kam ntawm tus neeg xyuas pib (lossis semiconductor) hloov nrog ntsuas kub. Qhov ntsuas tau yog -00℃rau 500 degree. Feem ntau siv yog platinum resistors (PT100, PT10) thiab tooj liab (CU50 degree) (-50℃rau 150 degree).

7. Thermocouples yog ib qho ntsuas kub uas siv kom paub qhov kub thiab txias. Lawv lub hauv paus ntsiab lus ua haujlwm yog tias lub peev xwm thoob plaws lawv cov kev txav pauv nrog kub. Cov yeeb ncuab kuj tseem tuaj yeem hu ua thermal sensors, tab sis lawv cov kev tawm tsam hloov nrog kub. Nws yog qhov yooj yim.

8. Thermocouples ntsuas kub raws ntawm cov nyhuv thermoelectric nyhuv. Feem ntau siv thermocumles suav nrog Platinum- chromium (qib} Nickel {{12} chromium {{14} }00} }00 __dium-rho tawm 0-600 deptan), thiab qib b, ntsuas ntau 0-1600 degree).

Ii. Pom

1. Khij daim ntawv lo

Daim ntawv lo muaj cov ntaub ntawv xws li thermocouple thiab tus sov.

2. Tshawb xyuas lub thawv hlws ris xaim

Thermocouples feem ntau muaj ob lub xov hlau, lossis plaub rau ob - ceg nkhaus. Tus cua kub feem ntau muaj peb lub xov hlau, lossis rau rau rau ob npaug- ceg nkhaus. Ib Leeg -} kab thermistors yuav muaj plaub xaim, thiab ob peb yuav muaj ob.

3. Khij lub davhlau ya nyob twg

Khij lub davhlau ya nyob twg. Yog tias muaj daim paib zoo thiab tsis zoo (xaim hluav taws xob tseem muaj lub cim zoo thiab tsis zoo), nws yog thermocouple; Yog tias tsis muaj daim paib zoo thiab tsis zoo, nws yog tus thermistor.

4. Khij cov tub ntxhais sab hauv

Ib lub thermocouple yog ob txoj xov hlau ntawm cov khoom sib txawv, welded ua ke ntawm qhov xaus; RTD yog ob lub xov hlau ntawm tib cov khoom, txuas nrog ib qho kub -}}}}} paub cov khoom. Yog li ntawd, RTD lub taub hau muaj lub cheeb tsam loj dua, thaum lub thermocouple tsis muaj qhov no (raws li qhia hauv daim duab 1).

5. Txheeb xyuas qhov tsis kam

Siv cov kev tiv thaiv ntau ntau ntawm cov ntau ntawm cov kev ntsuas kom ntsuas tsis kam. Nyob rau hauv ib txwm muaj xwm txheej, qhov tsis kam ntawm ib thermocouple yog tsawg heev, tsuas yog ob peb ohms; Qhov tsis kam ntawm RTD yog tshaj 100 ohms ntawm chav tsev kub.

III. Qhov sib txawv kub

1. RTDs thiab thermocots muaj cov ntsiab cai ntsuas kub sib txawv. RTDs ntsuas kub los ntawm kev hloov pauv lawv tsis kam nrog kub. Thermocouples ntsuas ntsuas kub los ntawm kev hloov pauv qhov ua rau voltage tsim los ntawm qhov kub hloov.

2. RTDs thiab thermococe muaj cov ntsuas kub sib txawv. RTDs ntsuas kub ntawm 0 txog 150 degree, thaum thermocouples ntsuas kub ntawm 0 txog 1000 degree.

3. Tus ntsuas cua sov thiab thermocoples siv cov khoom sib txawv. Tus mob cua sov siv ib qho kub thiab txias - rhiab yog ua los ntawm ob qho sib txawv.

4. Tus cua sov tau muaj qhov tseeb dua li thermocouples. Lawv feem ntau yog siv rau qhov kub nyob hauv qab 650 degree, thaum thermocouples feem ntau siv rau qhov kub siab tshaj 650 degree.

Qhov saum toj no yog cov ntsiab lus ntawm yuav ua li cas paub qhov txawv ntawm RTDs thiab thermocouples suav los ntawm Hordan Editor. Yog xav paub ntxiv txog ntawm thermocouples thiab RTDs, thov mus saib cov vev xaib hauv qab no: