RTD SENSOR

Luso zitsulo kusintha katundu wawo thupi mchikakamizo cha kutentha chimagwiritsidwa ntchito zipangizo. Choncho, mwachitsanzo, pulatinamu kukana thermometer amagwiritsa ntchito zitsulo katundu kuonjezera ake kukana magetsi ndi kuwonjezeka kutentha. Mwachitsanzo, pa T = 0 ^C. pulatinamu ali resistivity 100 ohms.

Fundo thermometer - ndi mita kulamulira, zomwe transmits kwa Mtsogoleri wa chizindikiro panopa impedance pakati ojambula ndi kachipangizo. Mtsogoleri njira deta ndi akuwatumiza dongosolo SCADA, kumene woyendetsa akhoza kale kuona zikuchitika kutentha mu kupanga ndondomeko. A thermometer kukana ntchito ngati mankhwala ndi kupanga makina.

kachipangizo mamangidwe wosavuta. Mkuwa kukana thermometer limapangidwa ojambula atatu, awiri amene atsekedwa wina ndi mzake, ndi wachitatu - okwana, ali ndi kulimbikira 120 ohms. kulumikiza dongosolo atatu waya zimagwiritsa, ngakhale pali kuchotserapo. The chingwe kwa chipangizo ulamuliro ayenera kutetezedwa lachitatu chipani kusokonezedwa. Sitiyenera kuikidwa pamodzi ndi mawaya amagetsi ayenera isagwe.

Opaleshoni dera ili: RTD - chotchinga - ndi zodziwikiratu dongosolo kulamulira. chipangizo yaikidwa pa piping, ndondomeko mizati, ntchito muyeso kutentha mu mayendedwe ntchito mapampu. The RTD ntchito ndi wodzichepetsa ndi n'ngolondoladi kuwerenga ake amasiyana pazipita leni madigiri 0,7.

Popeza kamangidwe ka ngati chipangizo palokha, monga thermometer kukana, mwachindunji ndi kutenthetsa kutengerapo kwa sing'anga kuti resistor, ndiye unsembe ndi n'komwe ndi malo kachipangizo. The piping ayenera insulated, pa mfundo opatsidwa mlingo sing'anga otaya ayenera maximized. The Kusokera mwa muyeso akhoza kuchepetsa kusintha maganizo kutalika kachipangizo ndodo ndi awiri TC. Kuposa kukhala bwino zotsatira zake zidzakhala zotani. kuya kumiza ayenera kuchita masamu ndi chikhalidwe cha kutentha kutengerapo sing'anga kuti idzitha kuyezeka. Mwachitsanzo, mu mapangidwe mkulu-kutentha monga nthunzi kapena zakumwa ayenera upambana nthawi 1.5 kutalika yogwira chipangizo kukana thermometer.

"Thermowell" yoyamba anamanga pa unsembe kusankha malo. Mtundu uwu wa malaya zodzitetezera anafuna kuti magawowa disassembly chipangizo, kuti sensa akhoza m'malo osaima ndondomekoyi. Popeza osiyanasiyana muyeso kutentha ndi mu osiyanasiyana 200 600 madigiri Celsius, malaya zoteteza amapangidwa zosapanga dzimbiri. Pamene ntchito aukali acidic kapena zofunika mapangidwe zapamadzi TACHIMATA ndi wapadera polima zikuchokera kugonjetsedwa kwa sing'anga anayeza.

Fundo thermometers amatuluka mu mayiko ambiri pa dziko. The odziwika bwino kwambiri zitsanzo: American "Wika", Russian "Metran" ndi European "Endress Hauser". zipangizozi ndi digiri yapamwamba ya kudalirika. Iwo sali okha angathe kupereka kutentha zonse, komanso kuti miyezo pa kutentha likusintha mofulumira.