Ubumbano nekhwalithi ye- SCR ungahlulelwa nge-pointer multimeter noma nge-multimeter yedijithali. I-Yunnan Changhui Instrument Manufacturing Co., Ltd. yethule ngokwahlukana ukusetshenziswa kwalawa ma-multimeter amabili ngenqubo yokulinganisa ubukhulu kanye nekhwalithi ye-SCR.

1. Sebenzisa i-multimeter yesikhombi ukuhlola ubumbano nekhwalithi ye-SCR

Ngokomgomo wenhlanganisela ye-PN, ukumelana phakathi kwezigxobo ezintathu ze-thyristor kungalinganiswa nge-ohmic block “R × 10” noma “R × 100” block ukwahlulela ukuthi kuhle noma kubi. Kukhona ukuhlangana kwe-PN phakathi kwe-electrode G yokulawula kanye ne-cathode K ye-thyristor. Ngaphansi kwezimo ezijwayelekile, ukumelana kwayo phambili kuphakathi kwamashumi ama-ohms kuya kumakhulu ama-ohms, futhi ukumelana okuphindayo ngokuvamile kukhulu kunokumelana phambili. Kwesinye isikhathi ukumelana okuphindayo kokulinganisa kwesigxobo sokulawula kuncane, okungasho ukuthi isigxobo sokulawula sinezici ezimbi. Ngokuyinhloko kuya ngokuthi iyahlangabezana yini nezici zomgwaqo we-PN.

2. Sebenzisa i-multimeter yedijithali ukuhlola ubukhulu kanye nekhwalithi ye-SCR

Yahlulela i-electrode digital multimeter ye-thyristor ku-diode block, xhuma i-red test lead ku-electrode eyodwa, bese kuthi i-black test ixhumane namanye ama-electrode amabili ngokulandelana. Uma enye yazo ikhombisa ukuthi i-voltage yizingxenye ezimbalwa zeshumi ze-volt, khona-ke i-test test ebomvu ixhunywe ku-electrode G yokulawula, i-black test lead ixhunywe ku-cathode K, enye i-anode A. Uma kukhombisa ukugcwala zombili lezi zikhathi, kusho ukuthi i-test test ebomvu ayixhunyiwe ku-electrode yokulawula, futhi i-electrode idinga ukushintshwa iphinde iphinde ibuyiselwe.

Ukuhlola amandla okubangela we-thyristor, i-multimeter yedijithali isethwe kubhlokhi le-PNP. Ngalesi sikhathi, izimbobo ezimbili ze-E esokeni le-hFE zikhokhiswe kahle, futhi imbobo ka-C ikhokhiswe kabi, futhi i-voltage ingu-2.8V. Ama-electrode amathathu we-thyristor aholelwa ngaphandle ngocingo, i-anode A ne-cathode K lead ifakwa emigodini u-E no-C ngokulandelana, futhi i-electrode G yokulawula imisiwe. Ngalesi sikhathi, i-thyristor icishiwe, i-anode yamanje ingu-zero, futhi kuzokhonjiswa i-000.

Faka ipali yokulawula G komunye umgodi u-E. Inani elibonisiwe lizokhula ngokushesha lisuke ku-000 kuze kuboniswe uphawu lokuchichima, bese lushintsha ngokushesha luye ku-000, bese lushintsha ukusuka ku-000 libuye lichichime futhi, njalonjalo. Le ndlela ingasetshenziselwa ukunquma ukuthi ngabe ukuqaliswa kwe-thyristor kunokwethenjelwa. Kodwa-ke, isikhathi sokuhlola kufanele sifushaniswe ngangokunokwenzeka ngenxa yamanje yamanje ekuhlolweni okunjalo. Uma kunesidingo, i-resistor yokuvikela yama-ohms angamakhulu amaningana ingaxhunywa ochungechungeni ku-anode ye-SCR.

Uma kusetshenziswa ibhulokhi ye-NPN, i-anode A ye-thyristor kufanele ixhunywe emgodini C, bese kuthi i-cathode K imbobo E ukuze kuqinisekiswe ukuthi i-voltage esetshenzisiwe iya phambili. Lapho uhlola amandla okubangela, ungafaki i-electrode yokulawula emgodini we-B, ngoba amandla we-B hole aphansi, futhi i-SCR ayikwazi ukuvulwa.