The power supply for the temperature transmitter must be free of voltage spikes; otherwise, the transmitter may be easily damaged. Transmitter calibration should be performed 5 minutes after power-up, and the ambient temperature at the time of calibration should be noted. When measuring high temperatures (>>100 degree), lub sensor kab noj hniav thiab lub thawv davhlau ya nyob twg yuav tsum tau muab cais tawm thermally siv cov khoom ntim los tiv thaiv lub thawv davhlau ya nyob twg los ntawm overheating thiab ua rau lub transmitter puas. Thaum siv lub sensor nyob rau hauv ib puag ncig uas muaj kev cuam tshuam loj heev ntawm electromagnetic, lub vaj tse yuav tsum ruaj khov los tiv thaiv kev cuam tshuam; Cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob sib txuas yuav tsum siv cov khoom siv tiv thaiv kab mob (feem ntau Ø10mm), thiab cov noob txiv kab ntxwv yuav tsum tau muab kaw kom nruj kom ntseeg tau tias muaj huab cua tsis zoo. Tsuas yog RWB-series kub transmitter muaj 0–10 mA tso zis (siv peb txoj kev teeb tsa hluav taws xob-); Txawm li cas los xij, ntawm cov zis qis dua 5% ntawm qhov ntsuas tag nrho, tsis yog -linearity yuav tshwm sim vim qhov kev txiav tawm ntawm cov transistor circuitry. Kub transmitters yuav tsum tau calibrated ib zaug txhua rau lub hlis. Yog tias DWB-series chav tsev tsis tuaj yeem raug kho cov kab hluav taws xob vim muaj kev txwv tsis pub siv hluav taws xob, nws raug nquahu kom xaiv qhov ntsuas qhov tsim nyog-raws li cov khoom siv phau ntawv- kom ntseeg tau tias qhov zoo tshaj plaws linearity.
Ua rau cov ntaub ntawv tsis raug tso tawm
1. Ntev cable khiav ua rau lub teeb liab attenuation;
2. Impedance mismatch nyob rau hauv cov teeb liab kab;
3. Teeb liab cuam tshuam vim tsis muaj kev tiv thaiv.
Integrated Temperature Transmitters
Ib qho kev sib xyaw RTD (Resistance Temperature Detector) transmitter yog ib qho khoom siv compact tsim los nruab ncaj qha rau hauv lub taub hau ntawm lub RTD sensor. Feem ntau, lub tshuab xa hluav taws xob sib xyaw ua ke muaj qhov kub thiab txias -sensing sojntsuam (txawm yog lub thermocouple lossis RTD sensor) thiab ob lub- hlau khoom- lub xeev hluav taws xob module. Los ntawm kev siv ib qho khoom siv - xeev module daim ntawv foos, qhov kev sojntsuam sojntsuam yog mounted ncaj qha rau hauv lub davhlau ya nyob twg lub taub hau, yog li tsim ib qho kev sib koom ua ke transmitter. Integrated kub transmitters feem ntau categorized ua ob lub ntsiab: RTD-raws li thiab thermocouple-raws li.
RTD kub transmitter suav nrog ntau lub zog ua haujlwm, suav nrog chav siv siv, R / V (kuj- rau-}voltage) hloov pauv chav tsev, ib qho hluav taws xob linearization, thim rov qab- kev tiv thaiv polarity, tam sim no - txwv kev tiv thaiv, thiab V / I (voltage-rau{5}) hloov dua siab tshiab. Tom qab lub teeb liab RTD tau hloov dua siab tshiab thiab nthuav dav, cov kab hluav taws xob linearization tau them nyiaj rau qhov tsis muaj nyob hauv qhov tsis muaj -linear kev sib raug zoo ntawm kub thiab hluav taws xob tsis kam; Thaum kawg, V/I conversion circuit outputs tas li -tam sim no teeb liab (feem ntau 4–20 mA) uas yog linearly proportional rau qhov ntsuas kub.
Lub thermocouple kub transmitter feem ntau muaj ntau yam thaiv hluav taws xob, xws li cov ntaub ntawv siv, txias-txoj kev them nyiaj hluav taws xob hluav taws xob, lub tshuab hluav taws xob, lub tshuab hluav taws xob, lub tshuab hluav taws xob, V / I converter, qhib- ntsuas hluav taws xob / ntsuas hluav taws xob, thim rov qab- tiv thaiv polarity, thiab kev tiv thaiv tam sim no - txwv Cov cuab yeej no ua haujlwm los ntawm kev noj cov khoom siv hluav taws xob uas muaj peev xwm tsim los ntawm lub thermocouple, them nyiaj rau qhov txias -txoj kev cuam tshuam, thiab ua kom lub teeb liab. Tom qab ntawd, lub linearizing Circuit Court yog ua hauj lwm los kho rau qhov inherent non-linearity ntawm lub thermoelectric tej zaum thiab kub, ua ntej lub teeb liab yog thaum kawg amplified thiab hloov mus rau hauv tus qauv 4-20 mA tam sim no tso zis. Txhawm rau tiv thaiv cov xwm txheej uas tshwm sim los ntawm kev tswj qhov kub thiab txias tsis ua haujlwm-vim los ntawm cov xaim thermocouple tawg thaum ntsuas- lub tshuab xa hluav taws xob tau nruab nrog qhov tsis ua haujlwm- tiv thaiv kev nyab xeeb. Yog hais tias lub thermocouple hlau tawg los yog raug kev txom nyem los ntawm kev sib txuas tsis zoo, lub transmitter yuav tso tawm qhov siab tshaj plaws tus nqi (28 mA), yog li ua rau cov cuab yeej cuam tshuam los txiav tawm lub zog hluav taws xob.
Integrated kub transmitters muaj ntau yam zoo, nrog rau cov qauv yooj yim, txo cov kev xav tau ntawm cov xaim, lub teeb liab tso zis muaj zog, muaj zog tiv thaiv kev cuam tshuam, zoo linearity, compatibility nrog cov cuab yeej yooj yim, thiab kev siv cov khoom siv -state modules uas tiv thaiv kev co thiab ya raws. Tsis tas li ntawd, lawv muaj qhov thim rov qab- kev tiv thaiv polarity thiab tam sim no - txwv kev tiv thaiv, ua kom ntseeg tau kev ua haujlwm.
Lub tshuab hluav taws xob sib xyaw ua ke tsim cov qauv tsim 4-20 mA tso zis teeb liab, ua rau nws ua tau zoo nrog lub computer-raws li kev tswj hwm thiab lwm yam kev ntsuas ntsuas. Raws li tus neeg siv thov, lub cuab yeej kuj tuaj yeem tsim los ua qhov tawg - pov thawj lossis hluav taws kub - ntsuas ntsuas ntsuas.