Pressure sensor 89448-34020 yamagalimoto a Toyota

1. Kulankhulana kutali

Panopa (4 mpaka 20 mA) ndi mawonekedwe omwe amakonda kwambiri analoji potumiza uthenga patali. Izi ndichifukwa choti kutulutsa kwamagetsi kumakhala kosavuta kusokoneza phokoso, ndipo chizindikirocho chimachepetsedwa ndi kukana kwa chingwe. Komabe, zomwe zikuchitika pano zimatha kupirira mtunda wautali ndikupereka kuwerengera kokwanira komanso kolondola kuchokera pa transmitter kupita ku dongosolo lotengera deta.

2. Kulimba kwa kusokoneza kwa RF

Mizere yama chingwe imakhala pachiwopsezo cha kusokonezedwa kwa ma electromagnetic (EMI) / radio frequency (RFI) / electrostatic (ESD) kuchokera ku zingwe zoyandikana ndi mizere. Phokoso lamagetsi losafunikirali lipangitsa kuwonongeka kwakukulu kwa ma siginecha apamwamba monga ma siginecha amagetsi. Vutoli limatha kugonjetsedwera mosavuta pogwiritsa ntchito kutsika kochepa komanso ma siginecha apamwamba, monga 4-20 mA.

3, kuthetsa mavuto

Chizindikiro cha 4-20 mA chimakhala ndi zotsatira za 4 mA ndipo mtengo wapakati ndi ziro. Izi zikutanthauza kuti siginecha ili ndi "zero yamoyo", kotero ngakhale kukakamiza kuwerenga ndi zero, kumawononga 4 mA yapano. Ngati chizindikirocho chikutsikira ku 0 mA, ntchitoyi ikhoza kupatsa wogwiritsa ntchito chidziwitso chomveka cha kulakwitsa kuwerenga kapena kutaya chizindikiro. Izi sizingakwaniritsidwe pamtundu wa ma voliyumu, omwe nthawi zambiri amachokera ku 0-5 V kapena 0-10 V, pomwe 0 V kutulutsa kukuwonetsa kupanikizika kwa ziro.

4. Kudzipatula kwazizindikiro

Chizindikiro cha 4-20 mA ndi chizindikiro chochepa chamakono, ndipo kuyika pansi pa malekezero onse awiri (kutumiza ndi kulandira) kungayambitse kuzungulira, zomwe zimapangitsa kuti pakhale chizindikiro cholakwika. Pofuna kupewa izi, mzere uliwonse wa sensa 4-20 mA uyenera kudzipatula bwino. Komabe, poyerekeza ndi kutulutsa kwa 0-10 V, izi zimalepheretsa sensa kuti ikhale yomangidwa ndi chingwe chimodzi.

5. Kulandira kulondola

Potumiza kuchokera ku sensa yamagetsi, voltmeter imatha kutanthauzira mosavuta chizindikiro cha 0-10 V pamapeto olandira. Pakutulutsa kwa 4-20 mA, chizindikirocho chimatha kuwerengedwa pokhapokha wolandila atasinthidwa kukhala magetsi. Kuti musinthe siginecha iyi kukhala kutsika kwamagetsi, chopinga chimalumikizidwa pamndandanda wazotulutsa. Kulondola kwa chotsutsa ichi ndikofunikira kwambiri pakuyesa kulondola kwa chizindikiro cholandilidwa.