A cikin aikace-aikacen saka idanu daban-daban, zamu iya lura cewa wasu lokuta ana buƙatar fitarwa na watsawa daban-daban don sarrafa siginar murabba'in 4 ~ 20mA. Irin waɗannan aikace-aikacen galibi suna faruwa a cikin tsarin auna kwararar masana'antu ta yin amfani da ƙa'idar matsa lamba daban-daban wacce ke ɗaya daga cikin shahararrun hanyoyin kula da ƙimar kwararar ruwa. Bayan an yi bitar ma'aunin kwararar DP na ɗan gajeren lokaci za mu iya fahimtar rawar da ke tattare da matsi daban-daban wajen taimakawa aikin na'urar kwarara.
Mitoci masu gudana suna taka muhimmiyar rawa wajen lura da ƙimar ruwa tsakanin rikitacciyar hanyar sadarwa ta bututun masana'antu ta hanyar samar da karatun kwarara akan madaidaitan tushe waɗanda ke ba da gudummawa ga ingantaccen sarrafa kayan aiki da amincin aiki. Hanyar matsa lamba daban-daban ita ce ɗayan manyan fasahar auna magudanar ruwa wanda ya haɗa da nau'ikan ma'aunin motsi. Sun bambanta a cikin tsari amma suna raba makasudin aiki iri ɗaya don haifar da tazarar matsin lamba don ƙididdige kwararar da ke kan mahimmin ƙa'idarDaidaiton BernoulliJimlar kuzarin da ya ƙunshi motsin motsi da yuwuwar kuzari a cikin kwararar ruwa ya kasance koyaushe ba tare da la'akari da yanayi ba. Don haka babban kashi na waɗancan na'urori na DP shine ainihin na'urar da za ta ɗaure (farantin Orifice, bututun venturi, bututun pitot, v-cone, da sauransu) don ƙirƙirar haɓakar kwarara a cikin sashin gida, wanda ke haifar da faduwa cikin matsin lamba na ruwa.
Wannan shine inda mai watsa matsi daban-daban ya shigo cikin wasa. Abubuwan farko na na'urori ne kawai na inji, suna haifar da bambancin matsa lamba a cikin tsarin amma babu ɗayansu da zai iya auna ƙimar da siginar fitarwa kai tsaye. Don haka suna buƙatar mataimaki don gano bambancin matsa lamba tsakanin sama da ƙasa kuma a ƙarshe su canza shi zuwa siginar fitarwa na ƙimar ma'aunin kwarara -- sauti kamar kyakkyawan aiki mai dacewa don watsa matsa lamba daban-daban.
Bayan an kafa ma'aunin DP, tambayar za ta kasance ta yaya za a iya danganta matsin lamba da ƙimar girma? Tushen akan Equation na Bernoulli da Ci gaba da Equation, alaƙar da ba ta dace ba tana wanzuwa tsakanin matsin lamba da aka haifar (ΔP) da ainihin magudanar ruwa (Q):
Q=K√ΔP
Inda K ke wakiltar ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun abubuwa da nau'in nau'in nau'in farko da wasu dalilai da yawa (yawancin ruwa, girman bututu da sauransu). Siginar danye na 4 ~ 20mA mai watsawa ba ta layi ba ce da zata iya gudana kuma baya iya wakiltar yanayinta yadda yakamata. Za a iya warware batun ta hanyar haɗewar hakar tushen murabba'i (SRE) wanda murabba'in tushen asalin ΔP yana yin siginar daidai da ƙimar kwararar ƙima a ƙarshe.
Idan mai watsawa ba zai iya aiwatar da SRE a ciki ba, dole ne a sarrafa lissafi ta hanyar kwamfuta ta waje ko tsarin sarrafawa wanda zai iya haɗawa da rikitarwa da yuwuwar makirufo kuskure a cikin hanyar sigina. Don haka masu watsawa na DP na zamani yawanci suna da siginar ginanniyar siginar SRE akan da'irar analog kuma suna iya fitar da tushen murabba'in 4 ~ 20mA. Menene ƙari, masu watsa shirye-shiryen DP na iya aiwatar da yanke ƙarancin kwarara don rage firikwensin firikwensin wanda za a iya ɗaukaka shi daidai gwargwado a ƙarancin gudu. Wannan aikin software yana tilasta fitarwa zuwa 4 mA (0% gudana) lokacin da ƙididdigewa ya faɗi ƙasa da ƙayyadaddun ƙofa don gujewa siginar da ba ta dace ba da tarin kwararar ƙarya.
Daban-daban tsarin auna kwarara kwararar matsa lamba daya ne daga cikin ingantattun fasahohin sarrafa kwararar kwarara. Yayin da suke ba da fa'idodi na ban mamaki, akwai kuma iyakoki saboda tsari da ƙa'ida:
+ Daidaitaccen ƙira, ingantaccen fasahar fasaha
+ Tsari mai ƙarfi da dorewa, babu sassa masu motsi
+ Inganta daidaito da kwanciyar hankali
- Rashin matsi na dindindin
- kunkuntar juyi rabo
- Mai hankali ga canje-canje a cikin yawan ruwa da sauran dalilai
Zaɓin na'urar motsi mai dacewa yana da mahimmanci don inganci da daidaiton ma'aunin kwararar ruwa. Ta cikakkiyar la'akari da abubuwan aiki masu amfani na iya yanke shawarar yanke shawara waɗanda suka dace da takamaiman buƙatu.Shanghai Wangyuanya tsunduma cikin masana'antu da sabis na aunawa da kayan sarrafa kayan aiki sama da shekaru 20 gami da kowane nau'in na'urar motsa jiki, masu watsa matsa lamba daban-daban da sauran kayan aiki don auna kwarara. Idan kuna da wata tambaya ko buƙatu, da fatan za ku yi shakka a tuntuɓe mu.
Lokacin aikawa: Agusta-25-2025