Ukunemba kwamamitha okushisa e-ultrasonic asebenza nge-clamp-on kuyisici esibalulekile ekwamukelweni kwawo kuzo zonke izimboni, futhi kuncike eziguqukweni eziningi—kufaka phakathi ukwakheka, izimo zokufaka, izakhiwo zoketshezi, kanye nokuhambisana nezindinganiso. Uma zikhethwe kahle, zifakiwe, futhi zigcinwa, la mamitha angafinyelela amazinga okunemba aphezulu afanelekela ukukhokhisa, ukulawula inqubo, kanye nokuphathwa kwamandla. Ngezansi kunencazelo eningiliziwe:
1. Izindinganiso Zokunemba kanye Nezilinganiso
Amamitha okushisa e-ultrasonic aqiniswayo ngokuvamile aqinisekiswa yizindinganiso zomhlaba wonke ezichaza amakilasi okunemba, okuqinisekisa ukuvumelana phakathi kwabakhiqizi. Izindinganiso ezibalulekile zifaka:
- I-EN 1434: Indinganiso eyinhloko yaseYurophu yamamitha okushisa, ehlukanisa amamitha ngezigaba zokunemba ngokusekelwe ekusebenzeni kokulinganisa ukugeleza (isb., Isigaba 1, Isigaba 2) kanye nokulinganisa izinga lokushisa.
- I-OIML R75: Indinganiso yomhlaba wonke (Inhlangano Yomhlaba Wonke Ye-Legal Metrology) ecacisa izidingo zokunemba zezicelo zokuhweba nezokukhokha.
Ngaphansi kwalezi zindinganiso, amamitha okushisa asebenza ngokucindezela ngokuvamile ahlangabezana nezindinganiso ezilandelayo zokunemba lapho esebenza ngaphakathi kwebanga lawo elibekiwe:
- Ukunemba Kokulinganisa Ukugeleza: ±1% kuya ku-±2% yenani elilinganisiwe ngaphansi kwezimo ezifanele (isb., ukugeleza okuzinzile, ukunemba kwamapayipi okulungile, kanye nokucaca koketshezi). Ukuze kube namazinga aphansi okugeleza (cishe ukugeleza okuncane okulinganiselwe kwemitha), ukunemba kungase kwehle kancane (isb., ±3% kuya ku-±5%).
- Ukunemba Kokulinganisa Izinga Lokushisa: ±0.1°C kuya ku-±0.2°C kwezinzwa zokushisa (ama-thermometer okumelana ne-PT100 noma i-PT1000), okubaluleke kakhulu ngoba ukubalwa kokushisa kuncike ekwehlukeni kwezinga lokushisa (ΔT) phakathi kokunikezwayo noketshezi olubuyayo.
- Ukunemba Kokulinganisa Ukushisa Okuphelele: Ukushisa kubalwa kusetshenziswa ifomula ethi Q=∫(qm×cp×ΔT)dt, lapho i-qm kuyi-mass flow, i-cp iyi-heat power ethize, kanti i-ΔT ingumehluko wokushisa. Uma kuhlanganiswa ukugeleza nokunemba kokushisa, ukunemba kokulinganisa ukushisa okuphelele kuvame ukusuka ku-±2% kuya ku-±5% ngaphansi kwezimo ezifanele, kuhlangatshezwane nezidingo zokukhokha (Isigaba 2 noma ngaphezulu ngokwe-EN 1434) kanye nokuqapha inqubo yezimboni.
2. Izici Ezithonya Ukunemba
Nakuba amamitha okucindezela aklanyelwe ukunemba okuphezulu, izimo zangempela zingathinta ukusebenza. Izici ezibalulekile zifaka:
a. Imibandela Yokufaka
Amamitha okubopha athembele kumasignali e-ultrasonic adluliselwa odongeni lwepayipi kanye noketshezi, okwenza ukufakwa kube yinto ebalulekile:
- Ukuqondana Nokuvinjelwa Kwepayipi: Ukuxokozela okuvela ezindololwaneni, amavalvu, noma amaphampu eduze kwenzwa kungaphazamisa amaphrofayili okugeleza, kunciphisa ukunemba. Izindinganiso (isb., EN 1434) zidinga ubude obuncane bepayipi eliqondile phezulu (isb., ububanzi bepayipi obuyi-10×) kanye nobubanzi bepayipi elingezansi (isb., ububanzi bepayipi obuyi-5×) yezinzwa ukuqinisekisa ukugeleza okuzinzile.
- Ukubekwa Kwezinzwa: Ukulungiswa kwezinzwa okungalungile (isb., ukungahleleki kahle kwama-transducer e-ultrasonic) noma ukuhlanganiswa okungekuhle (isb., izikhala zomoya phakathi kwezinzwa nezindonga zamapayipi ngenxa yokungafakwa kahle) kungenza buthaka ukudluliselwa kwesiginali, okuholela emaphutheni okulinganisa.
- Ukuhambisana Kwepayipi Noketshezi: Amamitha asebenza kahle kakhulu ngezindawo zamapayipi ezibushelelezi nezihlanzekile (akukho ukugqwala noma ukukala okunzima) kanye noketshezi olungabonakali (isb., amanzi, izingxube ze-glycol). Ukungcola okukhulu, inhlabathi, noma amabhamuza omoya oketshezini kungasakaza izimpawu ze-ultrasonic, kunciphisa ukunemba.
b. Izakhiwo Zoketshezi
Izici zoketshezi olulinganiswayo zithinta ngqo ukudluliswa kwesiginali:
- Ukucaca Koketshezi: Amabhamuza, izinto eziqinile, noma izinhlayiya ezilengayo (isb., udaka, izinsalela) zingasakaza amagagasi e-ultrasonic, okubangela ukulahleka noma ukubonakaliswa kwesignali. Nakuba amamitha anamuhla esebenzisa ukucubungula isignali okuthuthukisiwe ukuhlunga umsindo, uketshezi olunezibi kakhulu lungase lunciphise ukunemba.
- Ukuqina kanye Nokushisa: Kuketshezi oluqinile (isb., izingxube zamanzi e-glycol emazingeni okushisa aphansi), amaphrofayili okugeleza angashintsha, kodwa amamitha okucindezela ngokuvamile aqinile kuya kokwehluka okulinganiselwe kwe-viscosity.
- Ibanga Lezinga Lokugeleza: Ukunemba kuyawohloka ngaphandle kwebanga lokugeleza elibekiwe lemitha (isb., ukugeleza okuphansi kakhulu lapho izilinganiso zesiginali kuya komsindo zehla khona). Abakhiqizi banikeza "isilinganiso sokujika" (isb., 1:100 noma 1:200) esibonisa ububanzi bezinga lokugeleza lapho ukunemba kugcinwa khona.
c. Izici Zemvelo
- Umsindo Wangaphandle: Ukudlidliza, ukuphazamiseka kwe-electromagnetic (EMI), noma umsindo we-acoustic ovela emishinini eseduze kungaphazamisa izimpawu ze-ultrasonic. Amamitha anokuhlunga kwesignali okuthuthukisiwe anciphisa lokhu, kodwa ukufakwa ezindaweni zezimboni ezinomsindo kungadinga ukuvikelwa okwengeziwe.
- Ukushisa Okuphakeme: Ukusebenza kwenzwa kungahamba emazingeni okushisa aphezulu kakhulu (isb., < -20°C noma > 60°C), yize amamitha ebanga lezimboni eklanyelwe ukumelana nobubanzi obubanzi ngamaphutha amancane.
3. Ukunemba Ezicelweni Zomhlaba Wangempela
Empeleni, ukunemba kwamamitha okushisa e-ultrasonic acinyiwe kuyasebenza kuzo zonke izinhlelo zokusebenza lapho kulandelwa imikhuba emihle:
- Ukukhokhisa kanye Nokushisa Kwesifunda: Ukuze kukhokhiswe izinsiza (okulawulwa yizindinganiso zomthetho ze-metrology), amamitha alinganiswa ukuze ahlangabezane neSigaba 2 noma ngaphezulu ngaphansi kwe-EN 1434, okuqinisekisa ukunemba kokwabiwa kwezindleko phakathi kwabaphakeli nabasebenzisi bokugcina.
- Ukuqapha Inqubo Yezimboni: Ekwenzeni, ekukhiqizeni ugesi, noma ezinhlelweni ze-HVAC, amamitha ngokuvamile asebenza ngaphakathi kokunemba okungu-±2% kuya ku-±3%, okwanele ukwenza ngcono ukusetshenziswa kwamandla, ukubona ukungasebenzi kahle (isb., ukulahleka kokushisa), kanye nezinqubo zokulawula.
- Izimo Zokulungisa: Emapayipini amadala anezikali, ukugqwala, noma izimo zokugeleza ezingezinhle, ukunemba kungaba phansi kancane (isb., ±3% kuya ku-±5%), kodwa lokhu kuvame ukuthandwa kunemitha yokuhlasela, ebeka engcupheni yokuvuza noma isikhathi sokungasebenzi ngesikhathi sokufakwa.
4. Izinzuzo Ngaphezu Kwamamitha Aphazamisayo Ngokunemba
Nakuba amamitha okushisa e-ultrasonic noma emishini anganikeza ukunemba okuphezulu kancane ezimweni eziphelele, amamitha okucindezela anikeza izinzuzo ezihlukile ezihlobene nokunemba:
- Akukho Ukwehla Komfutho Noma Ukuphazamiseka Kokugeleza: Amamitha aphazamisayo aphazamisa ukugeleza, okuholela emaphutheni okulinganisa; imiklamo yokubamba ishiya ingaphakathi lepayipi lingathinteki, okugcina amaphrofayili okugeleza kwemvelo.
- Umthelela Wokunakekelwa Oncishisiwe: Ukungabikho kwezingxenye ezihambayo noma izingxenye zangaphakathi kusho ukuguguleka okuncane ngokuhamba kwesikhathi, okugcina ukunemba isikhathi eside kunamamitha omshini (okonakala ngenxa yokungqubuzana noma ukungcola).
Isifinyezo
Amamitha okushisa e-ultrasonic asebenza nge-clamp-on anikeza ukunemba okungu-±1% kuya ku-±3% ngaphansi kwezimo ezifanele (ukufakwa okufanele, uketshezi oluhlanzekile, ukugeleza okuzinzile) kanye no-±3% kuya ku-±5% ezimweni zangempela eziyinselele, ahlangabezana nezidingo ze-EN 1434, i-OIML R75, kanye nezinye izindinganiso. Ukunemba kwawo kwanele ekukhokhiseni, ekulawulweni kwenqubo yezimboni, kanye nokuphathwa kwamandla, kanye nezinzuzo ezengeziwe zokufakwa okungaphazamisi kanye nokuthembeka kwesikhathi eside. Ngezicelo ezibalulekile, ukuhlola indawo ngaphambi kokufakwa (ukuhlola izimo zamapayipi kanye namaphrofayili okugeleza) kanye nokulinganiswa komkhiqizi kuqinisekisa ukunemba okuphezulu.
Isikhathi sokuthunyelwe: Julayi-22-2025