Waya nkwụghachi ụgwọ bụ waya abụọ nwere oyi akwa mkpuchi nke nwere otu uru aha ya dị ka ike thermoelectromotive nke thermocouple dakọtara na oke okpomọkụ ụfọdụ (0~100°C). Njehie sitere na mgbanwe okpomọkụ na njikọ ahụ. Onye nchịkọta akụkọ na-esote ga-akọwara gị ihe waya nkwụghachi thermocouple bụ, ọrụ nke waya nkwụghachi thermocouple bụ, na nhazi nke waya nkwụghachi thermocouple.
1. Kedu ihe e ji waya nkwụghachi ụgwọ thermocouple mee?
Waya ụgwọ izugbe chọrọ ka elektrọd dị mma na nke na-adịghị mma dịrị otu ihe dị mma na nke na-adịghị mma nke thermocouple. Thermocouples ụdị K bụ nickel-cadmium (positive) na nickel-silicon (negative), yabụ dịka ọkọlọtọ si dị, a ga-ahọrọ waya nkwụghachi ụgwọ nickel-cadmium-nickel-silicon.
2. Kedu ọrụ nke waya nkwụghachi ụgwọ thermocouple?
Ọ bụ ịgbatị elektrọd ọkụ, ya bụ, njedebe oyi nke thermocouple mkpanaka, ma jikọọ ya na ngwa ngosipụta iji mepụta usoro nha okpomọkụ. Nabata ọkọlọtọ mba nke IEC 584-3 "Thermocouple Nkebi nke 3 - Waya Nkwụghachi Ụgwọ". A na-ejikarị ngwaahịa ndị a eme ihe na ngwaọrụ nha okpomọkụ dị iche iche, a na-ejikwa ha nke ọma na ike nuklia, mmanụ ala, kemịkalụ, igwe ígwè, ike eletrik na ngalaba ndị ọzọ.
3. Nhazi nke waya nkwụghachi ụgwọ thermocouple
N'ụkpụrụ, a na-ekewa ya n'ụdị ndọtị na ụdị nkwụghachi ụgwọ. Ihe mejupụtara kemịkalụ aha nke waya alloy nke ụdị ndọtị ahụ bụ otu ihe ahụ nke thermocouple dakọtara, yabụ ikike thermoelectric ahụ bụkwa otu ihe ahụ. A na-anọchite anya ya site na "X" na ụdị nlereanya ahụ, ihe mejupụtara kemịkalụ aha nke waya alloy nke ụdị nkwụghachi ahụ bụkwa otu ihe ahụ. Ọ dị iche na thermocouple dakọtara, mana n'ogo okpomọkụ ya na-arụ ọrụ, ike thermoelectric dị nso na uru aha nke ike thermoelectric nke thermocouple dakọtara, nke "C" na-anọchite anya ya na ụdị nlereanya ahụ.
A na-ekewa izi ezi nke ụgwọ ọrụ n'ime ọkwa nkịtị na ọkwa ziri ezi. Njehie mgbe a gbasịrị ụgwọ nke ọkwa ziri ezi bụ ọkara nke ọkwa nkịtị, nke a na-ejikarị eme ihe n'ebe ndị nwere ihe achọrọ maka izi ezi nke nha dị elu. Dịka ọmụmaatụ, maka waya nkwụghachi nke nọmba ngụcha akwụkwọ S na R, ndidi nke ọkwa ziri ezi bụ ±2.5°C, ndidi nke ọkwa nkịtị bụ ±5.0°C; maka waya nkwụghachi nke nọmba ngụcha akwụkwọ K na N, ndidi nke ọkwa ziri ezi bụ ±1.5°C, ndidi nke ọkwa nkịtị bụ ±2.5℃. Na ụdị ahụ, a naghị akara akara nkịtị, a na-agbakwụnyekwa ọkwa ziri ezi na "S".
Site na okpomọkụ ọrụ, a na-ekewa ya n'ime ojiji nkịtị na ojiji na-anaghị eguzogide okpomọkụ. Okpomọkụ ọrụ nke ojiji nkịtị bụ 0 ~ 100 °C (ole na ole bụ 0 ~ 70 °C);
Tinyere nke a, enwere ike kewaa isi waya ahụ n'ime waya nkwụghachi otu eriri na waya dị iche iche (waya dị nro), a pụkwara ikewa ya n'ime waya nkwụghachi nkịtị na nke a na-echebe dịka ma ha nwere oyi akwa nchekwa, e nwekwara waya nkwụghachi ụgwọ maka sekit nchekwa dị n'ime ya nke a raara nye ihe ndị na-egbochi mgbawa.