{"id":8619,"date":"2026-06-26T19:00:36","date_gmt":"2026-06-26T19:00:36","guid":{"rendered":"https:\/\/www.yunrui-controls.com\/?p=8619"},"modified":"2026-06-26T19:00:36","modified_gmt":"2026-06-26T19:00:36","slug":"pressure-transmitter-working-principle","status":"publish","type":"post","link":"https:\/\/www.yunrui-controls.com\/uz\/pressure-transmitter-working-principle\/","title":{"rendered":"Bosim o&#039;tkazgichining ishlash printsipi: Jarayon kuchidan 4-20mA signalgacha"},"content":{"rendered":"<h2>Bosim o&#039;tkazgich aslida nima qiladi?<\/h2>\n<p>A <strong>bosim o&#039;tkazgichi<\/strong> uch bosqichli tarjimon: u <strong>jismoniy kuchni his qiladi<\/strong>, bu kuchni elektr signaliga aylantiradi va boshqaruv tizimingizga standartlashtirilgan raqamli yoki analog chiqishni yetkazib beradi. Tushunish <strong>bosim o&#039;tkazgichining ishlash printsipi<\/strong> jarayon asboblarini aniqlaydigan, o&#039;rnatadigan yoki muammolarini bartaraf etadigan har bir kishi uchun juda muhimdir. Oddiy qilib aytganda, u sizning DCS yoki PLC ga jarayon suyuqligi qanchalik kuchli bosayotganini aniq ko&#039;rsatadi.<\/p>\n<p>Buni ovozli prujinali shkala kabi tasavvur qiling. Jarayon muhiti sensor elementga bosadi. Bu element biroz deformatsiyalanadi. Uzatuvchi bu deformatsiyani o&#039;lchaydi, uni 4-20 mA tok yoki raqamli protokolga aylantiradi va uni ikki simli halqa orqali yuboradi. Operatoringiz bosim qiymatini MPa, bar yoki psi da ko&#039;radi - egilgan metall bo&#039;lagi emas.<\/p>\n<div style=\"background: #f0f7ff; border-left: 4px solid #0066cc; padding: 15px 20px; margin: 20px 0;\">\n<p style=\"margin: 0; font-size: 15px;\"><strong>\ud83d\udd0d Bir jumlada:<\/strong> Bosim o&#039;tkazgichi &quot;qanchalik qattiq bosilayapti?&quot; degan signalni &quot;4.00 mA&quot; ga o&#039;zgartiradi - bu sizning boshqaruv tizimingiz tushunadigan til.<\/p>\n<\/div>\n<h2>Bosim qanday qilib signalga aylanadi: Sezish zanjiri<\/h2>\n<h3>Izolyatsiya diafragmasi: Birinchi aloqa nuqtasi<\/h3>\n<p>Transmitterning jarayoningizga tegadigan yagona qismi bu <strong>izolyatsiya diafragmasi<\/strong>. Odatda 316L zanglamaydigan po&#039;latdan, Hastelloy yoki tantaldan tayyorlangan bu yupqa metall membrana bosim ostida atigi bir necha mikronni \u2014 inson sochining kengligidan ham kamroqni \u2014 chetga suradi. Bu kichik harakat o&#039;lchash uchun butun boshlang&#039;ich nuqtadir.<\/p>\n<div style=\"background: #fff8f0; border-left: 4px solid #ff8800; padding: 15px 20px; margin: 20px 0;\">\n<p style=\"margin: 0; font-size: 15px;\"><strong>\u26a1 Qisqacha ma&#039;lumot:<\/strong> Odatdagi izolyatsiya diafragmasining qalinligi atigi 0,1 mm. To&#039;liq bosim ostida u 0,05 mm dan kamroq harakatlanadi \u2014 bu qog&#039;oz varag&#039;ining qalinligining taxminan yarmiga teng.<\/p>\n<\/div>\n<p>Diafragmaning orqasida quyidagilar bilan to&#039;ldirilgan bo&#039;shliq joylashgan <strong>silikon moyi<\/strong> (yoki kislorod bilan ta&#039;minlash uchun ftorokarbonli plomba). Yog &#039;siqilmaydi, shuning uchun har qanday diafragma siljishi uzatuvchi korpus ichidagi sensor chipiga ishonchli tarzda o&#039;tadi. Ushbu gidravlik mufta elektronikani korroziv, issiq yoki yopishqoq jarayon muhitidan ajratib turadi.<\/p>\n<h3>Siqilishdan elektr energiyasiga: Ikki asosiy texnologiya<\/h3>\n<p>To&#039;ldirish suyuqligi ichki sensorga bosim o&#039;tkazgandan so&#039;ng, uzatgich mexanik kuchlanishni elektron plata o&#039;qiy oladigan narsaga aylantirishi kerak. Sanoat qo&#039;llanmalarida ikkita texnologiya ustunlik qiladi:<\/p>\n<h4>1. Piezoresistiv (diffuz kremniy) sensorlar<\/h4>\n<p>Yupqa diafragma hosil qilish uchun kremniy plastinka mikromexanik ishlov beriladi. Ushbu diafragma ustiga to&#039;rtta piezoresistor tarqaladi <strong>Wheatstone ko&#039;prigi<\/strong> konfiguratsiya. Bosim kremniyni egganda, rezistorlar qiymati mutanosib ravishda o&#039;zgaradi. Ko&#039;prik millivolt darajasidagi signalni chiqaradi - odatda to&#039;liq miqyosda 100 mV yoki undan yuqori.<\/p>\n<p>Bort elektronikasi bu kuchsiz signalni kuchaytiradi, haroratni kompensatsiya qiladi va chiqishni chiziqli qiladi. Natijada noldan to&#039;liq miqyosgacha muammosiz o&#039;zgaradigan barqaror 4-20 mA signal hosil bo&#039;ladi. Ushbu texnologiya tejamkor, ajoyib takrorlanuvchanlikni ta&#039;minlaydi va umumiy jarayon qo&#039;llanmalarida ustunlik qiladi.<\/p>\n<h4>2. Sig&#039;imli sensorlar<\/h4>\n<p>Sig&#039;imli konstruksiyalarda bosim kondensatorning bir plastinkasi bo&#039;lib xizmat qiladigan metall diafragmani yo&#039;naltiradi. Boshqa plastinka esa o&#039;zgarmasdir. Plitalar orasidagi bo&#039;shliq o&#039;zgarganda, sig&#039;im teskari ravishda o&#039;zgaradi. Yuqori chastotali sxema bu sig&#039;im o&#039;zgarishini o&#039;lchaydi va uni mutanosib kuchlanishga aylantiradi.<\/p>\n<p>Kapasitiv sensorlar ustunlik qiladi <strong>past bosim va differensial bosim o&#039;lchovlari<\/strong> bu yerda kichik og&#039;ishlar yuqori aniqlik bilan hal qilinishi kerak. Ular, shuningdek, ba&#039;zi konfiguratsiyalardagi piezoresistiv dizaynlarga qaraganda ortiqcha bosim hodisalariga yaxshiroq toqat qiladilar.<\/p>\n<p><strong>Zanjir har doim bir xil:<\/strong> jarayon bosimi \u2192 diafragma siljishi \u2192 to&#039;ldiruvchi suyuqlik uzatish \u2192 sensor kuchlanishi \u2192 elektr o&#039;zgarishi \u2192 kuchaytirilgan va shartli 4-20 mA yoki raqamli chiqish.<\/p>\n<h2>Nol, Span va Turndown: O&#039;lchov oynasini sozlash<\/h2>\n<p>Har bir bosim o&#039;tkazgichi ikkita qiymat bilan belgilangan ma&#039;lum bir o&#039;lchov diapazoni uchun qurilgan:<\/p>\n<ul>\n<li><strong>Nol (LRV \u2014 Quyi diapazon qiymati):<\/strong> 4 mA hosil qiladigan bosim. 0-1 MPa o&#039;lchagichli uzatgichda nol atmosfera bosimi (0 MPaG) ga teng.<\/li>\n<li><strong>Span (URV \u2013 LRV):<\/strong> Yuqori va pastki diapazon qiymatlari orasidagi farq. 0-1 MPa uzatgich 1 MPa diapazonga ega.<\/li>\n<\/ul>\n<p>4-20 mA chiqishi bu diapazon bo&#039;ylab chiziqli ravishda joylashadi. Diapazonning 0% da siz 4 mA olasiz. 100% da siz 20 mA olasiz. 50% da siz 12 mA olasiz. Oddiy, oldindan aytib bo&#039;ladigan, universal.<\/p>\n<h3>Ishdan bo&#039;shatish nisbati: Moslashuvchanlikning chegaralari bor<\/h3>\n<p>Aqlli uzatgichlar sizga imkon beradi <strong>qayta diapazonlash<\/strong> qurilma elektron tarzda. 0-1 MPa quvvatga ega uzatgich 0-100 kPa uchun qayta konfiguratsiya qilinishi mumkin \u2014 10:1 pasayish. Ba&#039;zi zamonaviy qurilmalar 100:1 pasayish nisbatlarini taklif qiladi, ixtisoslashtirilgan dizaynlar esa yuqoriroq ko&#039;rsatkichlarga yetadi.<\/p>\n<div style=\"background: #f5fff5; border-left: 4px solid #00aa44; padding: 15px 20px; margin: 20px 0;\">\n<p style=\"margin: 0; font-size: 15px;\"><strong>\ud83d\udcca Misol:<\/strong> 0-100 kPa ga qayta o&#039;zgartirilgan 0-1 MPa uzatgich hali ham o&#039;zining to&#039;liq 16 mA signal oralig&#039;idan (4-20 mA) foydalanadi \u2014 ammo endi har bir mA 62,5 kPa o&#039;rniga atigi 6,25 kPa ni tashkil qiladi. Ruxsat yaxshilanadi, ammo elektr shovqiniga sezgirlik ham yaxshilanadi.<\/p>\n<\/div>\n<p>Lekin buning uchun murosaga kelish kerak. Siz diapazonni siqib chiqarganingizda, siz signal-shovqin nisbatini ham siqib chiqarasiz. 100:1 pasayish elektronikaning 1% to&#039;liq o&#039;lchamdagi diapazonni bir xil mutlaq aniqlik bilan hal qilishi kerakligini anglatadi. Odatda kalibrlangan diapazonning foizi sifatida ko&#039;rsatilgan mos yozuvlar aniqligi mutanosib ravishda pasayadi. Siz moslashuvchanlikka ega bo&#039;lasiz; siz oz miqdordagi aniqlikni qurbon qilasiz.<\/p>\n<div style=\"background: #fff0f0; border-left: 4px solid #cc0000; padding: 15px 20px; margin: 20px 0;\">\n<p style=\"margin: 0; font-size: 15px;\"><strong>\u26a0\ufe0f Muhim qoida:<\/strong> Siz har doim diapazonni qisqartirishingiz mumkin. Siz hech qachon sensorning maksimal nominal bosimidan xavfsiz ravishda oshib keta olmaysiz. Haddan tashqari bosim diafragmaning doimiy deformatsiyasiga olib keladi \u2014 bu kalibrlash o&#039;zgarishini hech qanday qayta sozlash bilan tuzatib bo&#039;lmaydi.<\/p>\n<\/div>\n<h2>O&#039;lchov, Absolyut va Differentsial: Bosimni o&#039;lchashning uchta usuli<\/h2>\n<p>Bu yerda dala muhandislari qoqilib ketishadi. Xuddi shu 4-20 mA signal uzatgich nima bilan taqqoslanayotganiga qarab butunlay boshqacha ma&#039;noni anglatadi.<\/p>\n<table>\n<thead>\n<tr>\n<th>Turi<\/th>\n<th>Malumot nuqtasi<\/th>\n<th>Odatdagi ilovalar<\/th>\n<th>Birlik Konvensiyasi<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>O&#039;lchov (G)<\/strong><\/td>\n<td>Atmosfera bosimi<\/td>\n<td>Tank bosimi, quvur liniyasi bosimi, nasosning zaryadsizlanishi<\/td>\n<td>MPaG, barG, psig<\/td>\n<\/tr>\n<tr>\n<td><strong>Mutlaq (A)<\/strong><\/td>\n<td>Mukammal vakuum (nol bosim)<\/td>\n<td>Vakuum tizimlari, barometrik o&#039;lchov, bug &#039;bosimi<\/td>\n<td>MPaA, barA, psia<\/td>\n<\/tr>\n<tr>\n<td><strong>Differensial (DP)<\/strong><\/td>\n<td>Yana bir jarayon bosimi nuqtasi<\/td>\n<td>Teshik oqimini o&#039;lchash, filtr monitoringi, suyuqlik darajasi<\/td>\n<td>kPaDP, mbarDP, inH2O<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Muhim munosabatlar<\/h3>\n<p><strong>O&#039;lchov bosimi = Mutlaq bosim \u2013 Atmosfera bosimi<\/strong><\/p>\n<div style=\"background: #f0f7ff; border-left: 4px solid #0066cc; padding: 15px 20px; margin: 20px 0;\">\n<p style=\"margin: 0; font-size: 15px;\"><strong>\ud83e\uddee Haqiqiy misol:<\/strong> Dengiz sathida atmosfera bosimi taxminan 101,3 kPaA (14,7 psia) ni tashkil qiladi. 200 kPaG bosimdagi kema aslida 301,3 kPaA bosimga ega. Agar siz o&#039;sha o&#039;lchov uzatgichini atmosfera bosimi 80 kPaA bo&#039;lgan tog&#039;ga olib borsangiz, u baribir 200 kPaG ni ko&#039;rsatadi \u2014 chunki u har doim mahalliy atmosfera ma&#039;lumotlarini ayiradi. Xuddi shu kemadagi mutlaq uzatgich balandlikdan qat&#039;i nazar 301,3 kPaA ni ko&#039;rsatadi.<\/p>\n<\/div>\n<div style=\"background: #f8f8f8; border: 1px solid #ddd; padding: 15px 20px; margin: 20px 0; border-radius: 4px;\">\n<p style=\"margin: 0 0 10px 0; font-weight: bold;\">\ud83e\udde0 Xotirani yaxshilash:<\/p>\n<ul style=\"margin: 0; padding-left: 20px;\">\n<li><strong>O&#039;lchov moslamasi<\/strong> &quot;Atrof-muhitdan qancha yuqori?&quot; deb so&#039;raydi.\u201c<\/li>\n<li><strong>Mutlaq<\/strong> &quot;vakuumdan qancha yuqori?&quot; deb so&#039;raydi.\u201c<\/li>\n<li><strong>Differensial<\/strong> &quot;Bu ikki nuqta o&#039;rtasidagi farq nima?&quot; deb so&#039;raydi.\u201c<\/li>\n<\/ul>\n<\/div>\n<h3>Differensial bosim: Oqim va darajaning ishchi kuchi<\/h3>\n<p>DP uzatgichlari alohida e&#039;tiborga loyiq, chunki ular qayta ishlash zavodlarida eng keng tarqalgan ikkita o&#039;lchov muammolarini hal qiladi:<\/p>\n<ul>\n<li><strong>Oqimni o&#039;lchash:<\/strong> Teshik plitasi, venturi yoki pitot naychasi oqim kvadratiga mutanosib bosim pasayishini hosil qiladi. DP uzatgichi bu pasayishni o&#039;lchaydi. Kvadrat ildiz ekstraktsiyasi (uzatgichda yoki DCSda amalga oshiriladi) DPni oqim tezligiga o&#039;zgartiradi.<\/li>\n<li><strong>Darajani o&#039;lchash:<\/strong> Yopiq bakda suyuqlik balandligi gidrostatik bosim hosil qiladi. DP uzatgichi bakning pastki qismidagi bosimni yuqori qismidagi gaz bosimi bilan taqqoslaydi. Farqi faqat suyuqlik bosimida. Suyuqlik zichligi ma&#039;lum bo&#039;lganda, siz sathni to&#039;g&#039;ridan-to&#039;g&#039;ri hisoblaysiz.<\/li>\n<\/ul>\n<h2>Ikki simli tsikl: bir juftlikdagi quvvat va signal<\/h2>\n<p>Dala sharoitidagi ko&#039;pgina bosim o&#039;tkazgichlari foydalanadi <strong>ikki simli 4-20 mA<\/strong> Ulanish. DCS analog kirish kartasidan uzatgichga ikkita sim o&#039;tadi. DCS 24 VDC ni ta&#039;minlaydi. Uzatuvchi elektronikasini quvvatlantirish uchun ushbu pastadirdan tok oladi - odatda minimal 3,6-4 mA. Qolgan tok bo&#039;shlig&#039;i, 4 mA dan 20 mA gacha, o&#039;lchov signalini uzatadi.<\/p>\n<p>Bu dizayn nafis. Alohida quvvat kabeli yo&#039;q. Bir nechta quvvat manbalaridan yerga ulash uzuklari yo&#039;q. Bitta juftlik hamma narsani bajaradi.<\/p>\n<p>DCS ichida aniqlikdagi 250 \u03a9 rezistor 4-20 mA tokni 1-5 V kuchlanishga aylantiradi. Analog-raqamli konvertor bu kuchlanishni o&#039;qiydi. 4 mA da siz 1 V ni ko&#039;rasiz. 20 mA da siz 5 V ni ko&#039;rasiz. DCS buni operator uchun muhandislik birliklariga - MPa, bar, suv dyuymlariga - qaytaradi.<\/p>\n<h3>Nima uchun 4 mA pol oqimi 0 mA emas<\/h3>\n<p>4 mA tasodifiy emas. Bu <strong>jonli nol<\/strong> bu uzatgichni minimal signalda quvvat bilan ta&#039;minlaydi. Agar tsikl 3,6 mA dan pastga tushsa, DCS biror narsa noto&#039;g&#039;ri ekanligini biladi - uzilgan sim, yonib ketgan sug&#039;urta yoki nosoz uzatgich. Bu <strong>ishlamay qolish darajasi past bo&#039;lgan signal<\/strong> standartga o&#039;rnatilgan. Haqiqiy 0 mA o&#039;lik pastadirdan farq qilmaydi.<\/p>\n<div style=\"background: #f5fff5; border-left: 4px solid #00aa44; padding: 15px 20px; margin: 20px 0;\">\n<p style=\"margin: 0; font-size: 15px;\"><strong>\ud83d\udca1 Nima uchun 0-20 mA emas?<\/strong> 0 mA nol bilan uzilgan sim va haqiqiy nol bosim ko&#039;rsatkichi bir xil ko&#039;rinadi. 4 mA jonli nol &quot;yurak urishi&quot;ni yaratadi - agar tsikl 4 mA yoki undan ko&#039;proqni ko&#039;rsatsa, siz uzatgichning ishlayotganini va gapirayotganini bilasiz.<\/p>\n<\/div>\n<p>Zamonaviy aqlli uzatgichlar ham haydashga qodir <strong>nosozlik oqimi<\/strong> \u2014 odatda 3,6 mA yoki 22 mA \u2014 sensorning ishdan chiqishi, haddan tashqari holat yoki diagnostika ogohlantirishini aniq signallash uchun.<\/p>\n<h2>Diafragma ishlamay qolganda: Dala diagnostikasi<\/h2>\n<p>Izolyatsiya diafragmasi uzatgichning ham mustahkamligi, ham zaifligidir. Bu faqat namlangan qism bo&#039;lib, u juda yupqa. Umumiy nosozlik rejimlariga quyidagilar kiradi:<\/p>\n<ul>\n<li><strong>Korroziya:<\/strong> Agressiv kimyoviy moddalar diafragma materialiga hujum qiladi. Ignali teshikdan oqayotgan suyuqlik to&#039;ldiruvchi suyuqlikning jarayonga oqib chiqishiga imkon beradi. Shlangi mufta yo&#039;qolganda uzatgich cho&#039;kadi, keyin muzlaydi.<\/li>\n<li><strong>Haddan tashqari bosim:<\/strong> Sensor chegarasidan tashqaridagi bosimning keskin ko&#039;tarilishi diafragmani doimiy ravishda deformatsiya qiladi. Nol siljishlar. Diapazon o&#039;zgaradi. Uzatgich hali ham signal chiqarishi mumkin, ammo u endi ishonchli emas.<\/li>\n<li><strong>Qoplama va ifloslanish:<\/strong> Diafragmada yopishqoq yoki kristallanadigan muhit to&#039;planadi. Qo&#039;shilgan massa javobni susaytiradi. Uzatuvchi haqiqiy bosim o&#039;zgarishlaridan orqada qoladi. Haddan tashqari holatlarda qoplama qattiq qatlam vazifasini bajaradi va uzatuvchi javob bermay qoladi.<\/li>\n<li><strong>Mexanik shikastlanish:<\/strong> Payvandlash choki sachrashi, metall parchalari yoki noto&#039;g&#039;ri ishlash diafragmani ezib yoki tirnashi mumkin. Mahalliy kuchlanish konsentratsiyasi oldindan aytib bo&#039;lmaydigan xatti-harakatlarni keltirib chiqaradi.<\/li>\n<\/ul>\n<h3>Tezkor tekshiruvlar<\/h3>\n<p>Bosim ko&#039;rsatkichi shubhali ko&#039;rinsa, uzatgichni ajratib oling va jarayon ulanishini atmosferaga chiqaring. O&#039;lchov uzatgichi nol ko&#039;rsatkichni (yoki unga juda yaqin) ko&#039;rsatishi kerak. Agar u o&#039;zgarmas ofsetni ko&#039;rsatsa, diafragma shikastlangan yoki sensor nolga siljigan bo&#039;lishi mumkin.<\/p>\n<div style=\"background: #f8f8f8; border: 1px solid #ddd; padding: 15px 20px; margin: 20px 0; border-radius: 4px;\">\n<p style=\"margin: 0 0 10px 0; font-weight: bold;\">\ud83d\udd27 Ikki bosqichli diagnostika:<\/p>\n<ol style=\"margin: 0; padding-left: 20px;\">\n<li><strong>Nolinchi chek:<\/strong> Atmosferaga ventilyatsiya qiling. O&#039;lchagich uzatgichi 0 ni ko&#039;rsatishi kerak. O&#039;zgarish aniqlandi = diafragma shikastlanishi yoki siljish nolga teng.<\/li>\n<li><strong>Loop tekshiruvi:<\/strong> Kalibratordan 12 mA ni to&#039;g&#039;ridan-to&#039;g&#039;ri DCS kanaliga kiriting. Agar DCS 50% ni o&#039;qisa, muammo yuqori oqimda (uzatgich, impuls liniyalari, jarayon ulanishi). Agar DCS noto&#039;g&#039;ri o&#039;qisa, muammo karta, konfiguratsiya yoki simlarda.<\/li>\n<\/ol>\n<\/div>\n<p>Ma&#039;lum bo&#039;lgan 4-20 mA signalni to&#039;g&#039;ridan-to&#039;g&#039;ri DCS kanaliga halqa kalibratori yordamida kiriting. Agar DCS to&#039;g&#039;ri o&#039;qisa, muammo yuqori oqimda \u2014 uzatgichda, impuls liniyalarida yoki jarayon ulanishida. Agar DCS hali ham noto&#039;g&#039;ri o&#039;qisa, muammo kartada, konfiguratsiyada yoki simlarda.<\/p>\n<h3>Ishlov berish qoidalari<\/h3>\n<div style=\"background: #fff0f0; border-left: 4px solid #cc0000; padding: 15px 20px; margin: 20px 0;\">\n<p style=\"margin: 0 0 10px 0; font-weight: bold;\">\ud83d\udeab Hech qachon:<\/p>\n<ul style=\"margin: 0; padding-left: 20px;\">\n<li>Diafragmani asboblar, barmoqlar yoki qattiq narsalar bilan bosing \u2014 hatto engil bosim ham elastiklik chegarasidan oshib ketishi mumkin<\/li>\n<li>Diafragmani yuqori bosimli havo yoki azot bilan puflang \u2014 mahalliy kuch uni ezishi yoki yorib yuborishi mumkin<\/li>\n<li>Tozalashda qirib tashlang yoki abraziv vositalardan foydalaning \u2014 tirnalgan diafragma shikastlangan diafragma hisoblanadi<\/li>\n<\/ul>\n<\/div>\n<ul>\n<li>Transmitterni olib tashlashda diafragmani yumshoq qopqoq bilan himoya qiling. Paxtasiz mato va mos keladigan erituvchi bilan muloyimlik bilan tozalang.<\/li>\n<\/ul>\n<h2>Tez-tez so&#039;raladigan savollar: Umumiy savollar<\/h2>\n<h3>Savol: Yuqori balandlikda o&#039;lchov uzatgichi boshqacha o&#039;qiydimi?<\/h3>\n<p>Yo&#039;q. O&#039;lchov uzatgichi mahalliy atmosfera bosimiga ishora qiladi, shuning uchun u shamollatilganda har doim nol ko&#039;rsatkichini ko&#039;rsatadi - dengiz sathida yoki 3000 metrda bo&#039;lsin. Absolyut uzatgich balandlikda pastroq qiymatni ko&#039;rsatadi, chunki atmosferaning absolyut bosimi pasaygan.<\/p>\n<h3>Savol: DP uzatgichining pastki qismini atmosferaga chiqish teshigi sifatida ishlata olamanmi?<\/h3>\n<p>Ha, lekin nimani o&#039;lchayotganingizni tushunib oling. Pastki tomon atmosferaga ochiq bo&#039;lganda, uzatgich o&#039;lchov bosimini o&#039;lchaydi - bu jarayon bosimi va atrof-muhit bosimi o&#039;rtasidagi farq. Agar jarayon bosimi atmosfera bosimidan pastga tushsa, farq manfiy bo&#039;ladi va chiqish 4 mA dan pastga tushishi mumkin. Ba&#039;zi uzatgichlar buni boshqaradi; boshqalari 4 mA da to&#039;yingan. Ochiq pastki tomonni yomg&#039;ir, axlat va hasharotlardan saqlang.<\/p>\n<h3>Savol: Bosim o&#039;tkazgichlari vakuumni o&#039;lchay oladimi?<\/h3>\n<p>Ha, to&#039;g&#039;ri tanlov bilan. Standart o&#039;lchov uzatgichlari ozgina salbiy bosimga (-0,1 barG yoki shunga o&#039;xshash) bardosh berishi mumkin. Chuqur vakuum uchun vakuum xizmati uchun mo&#039;ljallangan mutlaq uzatgichdan foydalaning. Diafragma ichkariga og&#039;ish uchun mo&#039;ljallangan bo&#039;lishi kerak va to&#039;ldirish suyuqligi past bosim ostida gaz chiqmasligi kerak. Hamma uzatgichlar ham nosimmetrik emas - ma&#039;lumotlar varag&#039;idagi salbiy bosim darajasini tekshiring.<\/p>\n<h2>Asosiy xulosalar<\/h2>\n<ul>\n<li>Bosim o&#039;tkazgichi mexanik kuchni zanjir orqali standartlashtirilgan elektr signaliga aylantiradi: diafragma \u2192 to&#039;ldiruvchi suyuqlik \u2192 sensor chipi \u2192 signalni sozlash \u2192 4-20 mA yoki raqamli chiqish.<\/li>\n<li>Piezoresistiv sensorlar umumiy qo&#039;llanmalarda ustunlik qiladi. Sig&#039;imli sensorlar past bosimli va yuqori aniqlikdagi o&#039;lchovlarda ustunlik qiladi.<\/li>\n<li>Gauge, absolyut va differentsial bir-birini almashtirib bo&#039;lmaydi. Transmitterni belgilashdan oldin mos yozuvlar nuqtasini biling.<\/li>\n<li>4-20 mA ikki simli halqa ham quvvat manbai, ham signal yo&#039;li hisoblanadi. 4 mA jonli nol simning uzilishi aniqlanishini ta&#039;minlaydi.<\/li>\n<li>Izolyatsiya diafragmasi eng zaif komponent hisoblanadi. Uni korroziya, ortiqcha bosim va mexanik shikastlanishdan saqlang.<\/li>\n<\/ul>\n<h2>Tegishli o&#039;qish<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.yunrui-controls.com\/uz\/4-20ma-signal-industrial-automation\/\">Nima uchun 4-20mA sanoat avtomatlashtirishining universal tili hisoblanadi<\/a><\/li>\n<li><a href=\"https:\/\/www.yunrui-controls.com\/uz\/rosemount-3051-pressure-transmitter-selection-guide\/\">Rosemount 3051 bosim o&#039;tkazgichini tanlash bo&#039;yicha qo&#039;llanma: Texnik xususiyatlar<\/a><\/li>\n<li><a href=\"https:\/\/www.yunrui-controls.com\/uz\/understanding-gauge-and-absolute-pressure\/\">O&#039;lchov va mutlaq bosimni tushunish: keng qamrovli texnik qo&#039;llanma<\/a><\/li>\n<li><a href=\"https:\/\/www.yunrui-controls.com\/uz\/transmitter-zero-migration-guide\/\">Transmitter Nol Migratsiya Qo&#039;llanmasi: Ijobiy va Salbiy Migratsiya Ta&#039;rifi<\/a><\/li>\n<li><a href=\"https:\/\/www.yunrui-controls.com\/uz\/temperature-transmitter-how-it-works\/\">Harorat o&#039;tkazgichlari issiqlikni ma&#039;lumotlarga qanday aylantiradi<\/a><\/li>\n<\/ul>\n<h2>To&#039;g&#039;ri bosim o&#039;tkazgichini tanlashda yordam kerakmi?<\/h2>\n<p>YUNRUI haqiqiy bosim o&#039;tkazgichlarini yetkazib beradi <a href=\"https:\/\/www.yunrui-controls.com\/uz\/brands\/rosemount\/\">Ruzmunt<\/a>, <a href=\"https:\/\/www.yunrui-controls.com\/uz\/brands\/endress-hauser\/\">Endress+Hauser<\/a>, <a href=\"https:\/\/www.yunrui-controls.com\/uz\/brands\/yokogawa\/\">Yokogava<\/a>, <a href=\"https:\/\/www.yunrui-controls.com\/uz\/brands\/honeywell\/\">Honeywell<\/a>, va butun dunyo bo&#039;ylab qayta ishlash sanoati uchun boshqa yetakchi brendlar. Sizga o&#039;lchov, absolyut yoki differentsial bosim o&#039;lchovi kerak bo&#039;ladimi, bizning dastur muhandislarimiz sizga jarayon sharoitlaringizga to&#039;g&#039;ri uzatgichni moslashtirishda yordam berishlari mumkin.<\/p>\n<p>Biz bilan bog&#039;laning <strong>sales@yunrui-controls.com<\/strong> yoki WhatsApp <strong>18710784030<\/strong> texnik maslahat va kotirovka uchun.<\/p>","protected":false},"excerpt":{"rendered":"<p>Bosim o&#039;tkazgichlari jismoniy kuchni standartlashtirilgan elektr signallariga qanday aylantirishini bilib oling. Pyezoresistiv va sig&#039;imli sensorlar, o&#039;lchov\/absolyut\/DP turlari, 4-20mA tsikllar va dala diagnostikasini qamrab oladi.<\/p>","protected":false},"author":1,"featured_media":8621,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[384,1],"tags":[],"class_list":["post-8619","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","category-blogs"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.8 (Yoast SEO v26.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>ressure Transmitter Working Principle | Field Guide - YUNRUI<\/title>\n<meta name=\"description\" content=\"Learn how pressure transmitters convert process force into 4-20mA signals. 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