Kumvetsetsa Ubwino Wa Ma Wire-Wire Pressure Transmitters

Ma transmitters ndi zinthu zofunika kwambiri pamafakitale omwe amayesa kuchuluka kwa zinthu zomwe si zamagetsi, monga kutentha, kuthamanga, kuthamanga, ndi ngodya. Nthawi zambiri, ma transmitters a 4-20mA amabwera m'mitundu itatu: mawaya anayi (mawaya awiri opangira magetsi ndi mawaya awiri apano), mawaya atatu (kutulutsa komweku komanso magetsi amagawana waya umodzi), ndi mawaya awiri.

M'nkhaniyi, tikambirana za ubwino wa ma transmitters a waya awiri, mtundu wa ma transmitter omwe atchuka kwambiri m'zaka zaposachedwa. Nawa maubwino ofunikira a mawaya awiri otumizira mawaya:

1. Kuchepa kwa chiwopsezo cha parasitic thermocouples ndi madontho amagetsi: Ma transmitters a waya awiri sagwidwa ndi ma parasitic thermocouples ndi madontho amagetsi pawaya, zomwe zimawalola kugwiritsa ntchito mawaya ocheperako, otsika mtengo. Izi zitha kupulumutsa ndalama zambiri za chingwe ndi kukhazikitsa.

2. Kuchepetsa kusokoneza kwa maginito amagetsi: Pamene kukana kwa magwero apano kuli kwakukulu kokwanira, mphamvu yamagetsi yopangidwa ndi maginito olumikizana ndi lupu yawaya nthawi zambiri imakhala yochepa. Izi zili choncho chifukwa gwero losokoneza limayambitsa kakombo kakang'ono kamene kangathe kuchepetsedwa pogwiritsa ntchito zingwe zopotoka.

3. Utali wautali wa chingwe: Kusokoneza kwa capacitive kungayambitse zolakwika pakukana kwa wolandira. Komabe, kwa 4-20mA waya wawaya awiri, kukana kwa wolandila nthawi zambiri kumakhala 250Ω, yomwe ndi yaying'ono yokwanira kupanga zolakwika zazing'ono. Izi zimalola kuti zingwe zazitali komanso zakutali poyerekeza ndi makina a telemetry.

4. Kusinthasintha pakusankha njira: Zida zosiyanasiyana zowonetsera limodzi kapena zojambula zimatha kusinthidwa pakati pa njira zosiyana ndi utali wa chingwe popanda kuchititsa kusiyana kolondola. Izi zimalola kulandidwa kwa data ndi kuwongolera pakati.

5. Kuzindikira zolakwika bwino: Kugwiritsa ntchito 4mA kwa zero-level kumapangitsa kuti zikhale zosavuta kuzindikira maulendo otseguka, maulendo afupiafupi, kapena kuwonongeka kwa sensa (0mA status).

6. Zosavuta kuwonjezera zida zodzitchinjiriza: Zida zoteteza ma surge zitha kuwonjezeredwa mosavuta padoko lotulutsa mawaya awiri, ndikupangitsa kuti ikhale yotetezeka komanso yosagwirizana ndi mphezi ndi mafunde.

Pomaliza, ma transmitters amawaya awiri amapereka maubwino angapo kuposa mitundu ina ya ma transmitters, monga kuchepetsa kutengeka kwa parasitic thermocouples ndi madontho amagetsi, kuchepetsedwa kwamagetsi amagetsi, kutalika kwa chingwe, kusinthasintha pakusankha njira, kuzindikira zolakwika, komanso kuwonjezera kosavuta kwa maopaleshoni. zida zodzitetezera. Ndi zopindulitsa izi, ma transmitters amawaya awiri akuchulukirachulukira m'mafakitale omwe amafunikira miyeso yolondola komanso yodalirika.