Cov khoom siv hluav taws xob siab yog cov khoom siv tseem ceeb hauv kev lag luam uas ntsuas qhov tsis muaj hluav taws xob lub cev, xws li kub, siab, ceev, thiab lub kaum ntse ntse.Feem ntau, 4-20mA transmitters tuaj nyob rau hauv peb hom: plaub-xaim transmitters (ob lub hwj huam mov nyob ntawm tej thiab ob tug tam sim no cov zis nyob ntawm tej), peb-xaim transmitters (tam sim no cov zis thiab fais fab mov sib koom ib tug hlau), thiab ob-xaim transmitters.
Nyob rau hauv tsab xov xwm no, peb yuav tham txog qhov zoo ntawm ob-xaim siab transmitters, ib hom ntawm lub siab transmitter uas tau muaj koob meej nyob rau hauv xyoo tas los.Nov yog qee qhov txiaj ntsig tseem ceeb ntawm ob-xaim siab transmitters:
1. Tsawg dua rau cov kab mob parasitic thermocouples thiab qhov hluav taws xob poob: Ob-xaim siab transmitters tsis tshua muaj kab mob parasitic thermocouples thiab voltage tee ntawm cov hlau, uas tso cai rau lawv siv cov xov hlau nyias nyias, tsis tshua muaj nqi.Qhov no tuaj yeem txuag tau tus nqi tseem ceeb ntawm cable thiab kev teeb tsa tus nqi.
2. Txo qhov cuam tshuam ntawm electromagnetic: Thaum qhov tso zis tsis kam ntawm qhov tam sim no loj txaus, qhov hluav taws xob cuam tshuam los ntawm cov hlau nplaum sib txuas rau hauv lub voj voog hlau feem ntau tsis tseem ceeb.Qhov no yog vim qhov cuam tshuam qhov chaw ua rau me me tam sim no tuaj yeem txo qis siv cov kab sib tw twisted.
3. Ntev ntev cable ntev: Capacitive cuam tshuam tuaj yeem ua rau qhov tsis zoo ntawm lub receiver tsis kam.Txawm li cas los xij, rau 4-20mA ob-xaim ob lub voj, tus txais kev tiv thaiv feem ntau yog 250Ω, uas yog me me los tsim qhov tsis tseem ceeb.Qhov no tso cai rau kom ntev thiab deb ntawm cable ntev piv rau voltage telemetry systems.
4. Kev ua kom yooj yim hauv kev xaiv channel: Ntau yam kev ua yeeb yam ib leeg lossis cov cuab yeej kaw tuaj yeem hloov pauv ntawm cov channel sib txawv nrog cov kab sib txawv ntev yam tsis ua rau qhov sib txawv ntawm qhov tseeb.Qhov no tso cai rau cov ntaub ntawv decentralized tau txais thiab kev tswj hwm hauv nruab nrab.
5. Kev kuaj xyuas yooj yim: Siv 4mA rau xoom-theem ua rau nws yooj yim los kuaj xyuas cov kab hluav taws xob qhib, luv Circuit Court, lossis sensor puas (0mA raws li txoj cai).
6. Yooj yim ntxiv cov khoom tiv thaiv surge: Cov cuab yeej tiv thaiv kev tiv thaiv tuaj yeem yooj yim ntxiv rau ob lub xov hlau tso tawm, ua rau nws muaj kev nyab xeeb dua thiab tiv taus xob laim thiab surges.
Nyob rau hauv xaus, ob-xaim siab transmitters muaj ntau yam zoo dua lwm hom transmitters, xws li txo kev raug rau parasitic thermocouples thiab voltage te, txo electromagnetic cuam tshuam, ntev cable ntev, saj zawg zog nyob rau hauv kev xaiv channel, yooj yim kev txhaum, thiab yooj yim ntxiv ntawm surge. cov cuab yeej tiv thaiv.Nrog rau cov txiaj ntsig no, ob-xaim siab transmitters tau dhau los ua neeg nyiam nyob rau hauv cov ntawv thov kev lag luam uas yuav tsum tau ntsuas qhov tseeb thiab txhim khu kev qha.
Post lub sij hawm: Apr-25-2023