Umqondo wezinhlobo zengcindezi, inzwa nesidlulisi

Ingcindezi: Amandla e-fluid medium asebenza endaweni yeyunithi. Iyunithi yayo yokulinganisa esemthethweni yi-pascal, efanekiselwa yi-Pa.

Ingcindezi ephelele (P_A): Ukucindezela kukalwa ngokusekelwe ku-vacuum ephelele (zero pressure).

I-gauge pressure (P_G): Ukucindezela kukalwa ngokusekelwe kumfutho wangempela womkhathi.

Ingcindezi evaliwe (P_S): Ukucindezela kukalwa ngokusekelwe kumfutho ojwayelekile womkhathi (101,325Pa).

Ingcindezi engemihle: Lapho inani lokucindezela kwegeji <ukucindezela okuphelele kwangempela. Ibizwa nangokuthi i-vacuum degree.

Ingcindezi ehlukile (P_D): Umehluko wengcindezi phakathi kwanoma yimaphi amaphuzu amabili.

Inzwa yokucindezela: Idivayisi izwa ingcindezi futhi iguqule isignali yokucindezela ibe isignali yokuphuma kukagesi ngokuya ngephethini ethile. Ayikho isekethe ye-amplifier ngaphakathi kwenzwa. Ukukhishwa kwesikali esigcwele ngokuvamile kuyiyunithi ye-milivolt. Inzwa inomthamo ophansi wokuthwala futhi ayikwazi ukuxhumana nekhompyutha ngokuqondile.

I-Pressure Transmitter: I-transmitter ingaguqula isignali yokucindezela ibe isignali ephumayo kagesi elinganiselwe enobudlelwane obuqhubekayo bomugqa wokusebenza. Amasignali okukhiphayo ajwayelekile ahlanganisiwe ngokuvamile awamanje aqondile: ① 4~20mA noma 1~5V; ② 0~10mA 0~10V. Ezinye izinhlobo zingakwazi ukuxhumana nekhompyutha ngokuqondile.

 

I-pressure transmitter = Inzwa yokucindezela + Isekethe ye-amplifier ezinikele

 

Empeleni, abantu ngokuvamile abawenzi umehluko oqinile phakathi kwamagama emishini emibili. Omunye angase akhulume ngenzwa okuthi noma kunjalo ibhekisele kusidlulisi esinokukhipha okungu-4~20mA.