Mō te tuku tohu tuku i roto i ngā tono aunoatanga ahumahi, ko te 4~20mA tētahi o ngā kōwhiringa tino noa. Mēnā ka puta he whanaungatanga rārangi i waenga i te taurangi tukanga (pēhanga, taumata, pāmahana, me ētahi atu) me te putanga o te iahiko. Ko te 4mA te rohe o raro, ko te 20mA te rohe o runga, ā, ko te whānuitanga o te awhe ko te 16mA. He aha ngā momo painga e wehewehe ana i te 4~20mA mai i ētahi atu putanga o te iahiko me te ngaohiko, ā, e tino rongonui ana?
E whakamahia ana te au me te ngaohiko mō te tuku tohu hiko. Heoi, he pai ake te tohu au i te ngaohiko i roto i ngā tono taputapu. Ko tētahi o ngā take matua ko te iti ake o te tūponotanga o te putanga au pumau ki te hekenga ngaohiko i runga i te tuku tawhiti nā te mea ka taea e ia te whakanui ake i te ngaohiko taraiwa hei utu i te hekenga o te tuku. I taua wā, ki te whakaritea ki te tohu ngaohiko, he hononga raina ake te au ki ngā taurangi tukanga e whai wāhi ana ki te whakatikatika me te utu ngāwari ake.
Tuku Taumata Ruku Ārai Uira, 4~20mA 2-waea
He rerekē ki ētahi atu tauine tohu au noa (0~10mA, 0~20mA me ētahi atu), ko te āhuatanga matua o te 4~20mA kāore e whiriwhiri i te 0mA hei rohe iti o te awhe ine. Ko te take i whakapiki ai i te tauine kore ki te tauine ora, he mea hei whakatau i te raruraru kore mate, arā, ko te kore e taea te kite i te hapa o te pūnaha e puta ai te rahunga ka kore e taea te wehewehe i te putanga 0mA mēnā ko te tauine au iti ko te 0mA anō hoki. Mō te tohu 4~20mA, ka taea te tautuhi mārama i te pakaru mā te hekenga o te au i raro i te 4mA, nā te mea kāore e kiia he uara ine.
Tuku Pēhanga Rerekē 4~20mA, kore ora 4mA
Hei tāpiritanga, mā te rohenga o raro 4mA ka whakarite kia iti rawa te kaha e pau ana hei whakahaere i te taputapu, ā, mā te rohenga o runga 20mA ka ārai i te whara kino ki te tinana tangata mō ngā take haumaru. Ko te ōwehenga awhe 1:5 e rite ana ki te pūnaha whakahaere hau tuku iho ka whai wāhi ki te tatau ngāwari me te hoahoa pai ake. He kaha te ārai haruru o ngā waea-rua e rua e whakahaerehia ana e te koropiko o nāianei, ā, he watea mō te tāutanga.
Nā ēnei painga katoa, ka waiho te 4-20mA hei tetahi o ngā putanga taputapu tino maha ngā mahi i roto i te aunoatanga whakahaere tukanga. Neke atu i te 20 tau a Shanghai WangYuan e hanga ana i ngā taputapu. Ka whakaratohia e mātou he taputapu tino pai me te 4-20mA, ētahi atu kōwhiringa putanga ritenga rānei mō...pēhanga, taumata, pāmahanamererete mana whakahaere.
Wā tuku: Paenga-whāwhā-26-2024