Cov Kev Cai Xaiv 2 xaim, 3 xaim, lossis 4 xaim Configuration rau Transmitter?

Dab tsi yog cov txheej txheem rau xaiv 2 xaim, 3 xaim, lossis 4 xaim teeb tsa rau transmitter?

Feem ntau, tej zaum 2-hlau yog thawj qhov mus-rau vim tias nws muaj tus nqi txuas hluav taws xob tsawg tshaj plaws thiab AO ntawm 2- cov khoom siv hlau raug cais tawm hauv av hauv av (tsis txhob muaj teeb meem hauv av)

Thaum muab kev lag luam thiab cov neeg siv kawg rau hauv kev txiav txim siab:
1) Yog tias qhov kawg siv yog DCS, thawj qhov kev xaiv yog 2-wire voj-powered vim tias feem ntau DCS AI qhov kev cia siab 2-hlau, yog li DC lub voj voog fais fab yog nyuaj xaim rau ib qho ntawm AI terminals ua rau nws ib qho active input.

Yog hais tias lub teb ntaus ntawv yog 3-hlau los yog 4-hlau, ces yuav tsum tau ib tug ntxiv cais cais, passive nyob rau hauv lub DCS sab, active nyob rau hauv lub teb (tsis muaj peev xwm khiav ib tug active-tso tawm teb ntaus ntawv rau ib active input, cov khoom siv fais fab yuav buck ib leeg).
2) Cov kev xav tau ntawm lub zog rau Intrinsic Safety muaj tsawg heev uas qhov kev xav tau ntawm I/S tej zaum yuav yog ib qho kev xaiv ntawm 2- xov hlau.
3) Rau qhov seem ntawm kev ua lag luam, xaiv 2-hlau yog tias nws muaj rau cov thev naus laus zis. Qee cov thev naus laus zis tsuas yog siv lub zog ntau dhau los ua haujlwm nrog 3.5mA muaj nrog 2-wire voj fais fab. Coriolis thiab thermal dispersion flow meters feem ntau yog 4 xaim. Gas analyzers feem ntau yog 4 xaim.
4) Yog tias nws yog oddball thiab tsis yog kev lag luam, zoo li lub tshuab ntsuas kev tshawb fawb, nws yuav zaum yog 4- hlau, tsis yog qhov hluav taws xob tawm hluav taws xob thiab qhov ntawd yog qhov koj tau txais.
5) Muaj qee zaus tsis tshua muaj kev sib txuas ntev ntev uas cov khoom siv hluav taws xob DC tso tawm rau 2- cov khoom siv hlau tuaj yeem nce ntxiv kom kov yeej lub voj tsis kam ntawm cov kab hluav taws xob. A 4-cov khoom siv hlau uas muaj cov khoom tso tawm tej zaum yuav tsis muab kev hloov kho ntawm nws cov khoom siv hluav taws xob sab hauv thiab yuav xav tau ib qho kev sib cuam tshuam uas tuaj yeem tswj tau ntau dua DC voltage.

Muaj kev txaus siab txog transmitters nyiamUPB1 silicon siab transmitter, UTB3 general kub transmitter, ULB-2T kub thiab qib sensorlwm yam, thov hu rauStella Meng.