Ana amfani da firikwensin don tantance yawan: ƙarfin da samfurin ke yi yana jujjuya siginar lantarki ta firikwensin awo. Sabili da haka, ƙwayar ɗigon kaya wani abu ne na ma'aunin lantarki.

Fasahar da aka fi amfani da ita ta dogara ne akan fasahar ma'aunin iri: na'urar firikwensin analog ɗin ta ƙunshi nau'in ma'auni (wanda ake kira jikin bazara) wanda aka yi da ƙarfe ko aluminum, wanda aka sanya ma'aunin ma'aunin (Wheatstone Bridge). Kowane sikelin lantarki yana da haɗe-haɗen tantanin halitta don tabbatar da cewa za a iya auna nauyi.

Ana amfani da na'urori masu auna ma'aunin ma'auni, amma akwai wasu fasahohin aunawa, kamar fasahar biyan diyya ta wutar lantarki ta EMFC, wanda ƙudurin taro ya cika gaba ɗaya ba tare da asara ba. Yawancin lokaci, ana shigar da ƙwayoyin kaya a cikin masana'antu, irin su ciko shuke-shuke, tankuna masu auna, ƙayyade adadin cika, da dai sauransu.

Sensor wiring ya kasance ɗaya daga cikin tambayoyin da aka fi shawarta a cikin tsarin siyan abokin ciniki, yawancin abokan ciniki ba su san yadda ake haɗa na'urar firikwensin ba, a zahiri, hanyoyin haɗin na'urori masu auna firikwensin iri ɗaya ne, na'urori masu auna firikwensin gabaɗaya suna da tsarin waya guda biyu. tsarin waya uku, tsarin waya hudu, da wasu tsarin waya biyar.
Matsa lamba firikwensin tsarin wayoyi biyu yana da sauƙi mai sauƙi, abokan ciniki na gabaɗaya sun san yadda ake waya, ana haɗa waya zuwa ingantaccen wutar lantarki, ɗayan layin shine layin siginar ta kayan aikin da aka haɗa da wutar lantarki mara kyau, wannan shine mafi sauƙi, Matsakaicin firikwensin tsarin waya uku yana kan tsarin tsarin waya biyu tare da layi, layin yana haɗa kai tsaye zuwa wutar lantarki mara kyau, mafi matsala fiye da tsarin waya biyu. Na'urar firikwensin matsi mai waya hudu tabbas ita ce shigar da wutar lantarki guda biyu, sauran biyun kuma fitowar sigina ce. Tsarin wayoyi huɗu galibi fitarwar wutar lantarki ne maimakon fitarwar 4 ~ 20mA, 4 ~ 20mA da ake kira mai watsa matsa lamba, mafi yawan tsarin wayoyi biyu. Wasu daga cikin siginar siginar firikwensin matsa lamba ba a ƙara su ba, kuma cikakkiyar fitarwar ita ce dubun millivolts kawai, yayin da wasu na'urori masu auna firikwensin suna da da'irar amplifier a ciki, kuma cikakken fitarwa shine 0 ~ 2V. Dangane da yadda ake karɓar kayan aikin nuni, ya dogara da girman girman girman kayan aikin, idan akwai na'urar da ta dace da siginar fitarwa, ana iya auna ta kai tsaye, in ba haka ba ya zama dole don ƙara da'ira daidaita siginar. . Na'urar firikwensin matsa lamba biyar ba ta bambanta da tsarin waya huɗu ba, kuma firikwensin waya biyar a kasuwa kaɗan ne.