Iinkqubo zokulinganisa amandla ombane zibalulekile kuwo onke amashishini, urhwebo norhwebo.Ekubeni iiseli zomthwalo ziyinxalenye ebalulekileyo yeenkqubo zokulinganisa amandla, kufuneka zichaneke kwaye zisebenze ngokufanelekileyo ngamaxesha onke.Nokuba njengenxalenye yolondolozo olucwangcisiweyo okanye ekuphenduleni ukucinywa kwentsebenzo, ukwazi ukuvavanya alayisha iseliinokunceda ukwenza izigqibo ezinolwazi malunga nokulungisa okanye ukutshintshwa kwamalungu.
Kutheni iiseli zomthwalo zisilela?
Iiseli zomthwalo zisebenza ngokulinganisa amandla asetyenziswa kuzo ngophawu lwamandla ombane oluthunyelwe kumthombo wamandla olawulwayo.Isixhobo senkqubo yokulawula, esifana nesandisi-lizwi okanye iyunithi yolawulo loxinzelelo, emva koko iguqule isiginali ibe lixabiso elifundeka lula kwisibonisi sedijithali.Kufuneka benze phantse kuyo yonke indawo engqongileyo, enokuthi ngamanye amaxesha ibe nemingeni emininzi ekusebenzeni kwabo.
Le mingeni yenza iiseli zomthwalo zithande ukusilela kwaye, ngamanye amaxesha, zinokufumana imiba echaphazela ukusebenza kwazo.Ukuba ukusilela kuyenzeka, luluvo oluhle ukukhangela imfezeko yenkqubo kuqala.Ngokomzekelo, akuqhelekanga ukuba izikali zizaliswe ngomthamo.Ukwenza oko kunokubangela ukuba iseli yomthwalo ikhubazeke kwaye ide ibangele ukothuka.Ukunyuka kwamandla kunokutshabalalisa iiseli zomthwalo, njengako nakuphi na ukufuma okanye ukuchitheka kweekhemikhali kwindawo yokungena kwisikali.
Iimpawu ezithembekileyo zokusilela kweeseli zomthwalo ziquka:
Isikali/isixhobo asiyi kuphinda simise okanye silinganise
Ufundo olungangqinelaniyo okanye olungathembekanga
Ubunzima obungabhalwayo okanye uxinzelelo
Ukukhukuliseka ngokungaqhelekanga kwibhalansi engu-zero
akazange afunde kwaphela
Layisha ingxaki kwiSeli:
Ukuba isixokelelwano sakho sisebenza ngokungalunganga, khangela nakuphi na ukukhubazeka komzimba.Ukuphelisa ezinye izizathu ezicacileyo zokungaphumeleli kwenkqubo - iintambo ezidibeneyo ezidibeneyo, iingcingo ezivulekileyo, ukufakwa okanye ukudibanisa kwiipaneli ezibonisa uxinzelelo, njl.
Ukuba ukusilela kweeseli zomthwalo kusenzeka, uthotho lweendlela zokuxilonga iingxaki kufuneka lwenziwe.
Nge-DMM ethembekileyo, ekumgangatho ophezulu kunye nobuncinci be-4.5-digit gauge, uya kuba nakho ukuvavanyela:
zero balance
Ukumelana ne-insulation
ibhulorho ingqibelelo
Nje ukuba unobangela wokungaphumeleli uchongiwe, iqela lakho linokugqiba ukuba liqhube njani na phambili.
Ibhalansi enguziro:
Uvavanyo lwe-zero balance lunokunceda ukumisela ukuba iseli yomthwalo ifumene nawuphi na umonakalo owenziwe ngokomzimba, njengomthwalo ogqithisileyo, ukulayisha ukothuka, okanye ukunxiba kwentsimbi okanye ukudinwa.Qinisekisa ukuba iseli yomthwalo "akukho mthwalo" ngaphambi kokuba uqale.Emva kokuba ukufundwa kwebhalansi ye-zero kubonisiwe, qhagamshela ii-terminal zokufaka iiseli zomthwalo kwi-excitation okanye igalelo lombane.Ukulinganisa umbane nge-millivoltmeter.Ukwahlula ukufundwa ngegalelo okanye i-voltage yokuvuselela ukufumana ibhalansi ye-zero kwi-mV / V.Olu fundo kufuneka luhambelane nesatifikethi sokulinganisa iseli yoqobo okanye iphepha ledatha yemveliso.Ukuba akunjalo, iseli yomthwalo imbi.
Ukumelana ne-Insulation:
Ukuxhatshazwa kwe-insulation kulinganiswa phakathi kwesikhuselo sekhebula kunye nomthwalo wesekethe yeseli.Emva kokuqhawula iseli yomthwalo kwibhokisi yokudibanisa, qhagamshela zonke iinkokeli kunye - igalelo kunye nemveliso.Ukulinganisa ukuxhathisa kwe-insulation kunye ne-megohmmeter, ukulinganisa ukunyanzeliswa kwe-insulation phakathi kwentambo yokukhokela edibeneyo kunye nomzimba weseli yomthwalo, emva koko i-cable shield, kwaye ekugqibeleni ukuxhathisa ukugquma phakathi komzimba weseli yomthwalo kunye nekhaka lentambo.Ukufundwa kokumelana ne-insulation kufuneka kube yi-5000 MΩ okanye ngaphezulu kwibhulorho-kwimeko, ibhulorho ukuya-kwintambo yesikhuselo, kunye nesikhuselo sekhebula ukuya kwintambo, ngokulandelanayo.Amaxabiso asezantsi abonisa ukuvuza okubangelwa kukufuma okanye ukubola kweekhemikhali, kwaye ufundo oluphantsi kakhulu luphawu oluqinisekileyo lokungena okufutshane, hayi ukufuma.
IBhulorho yeMfezeko:
Ingqibelelo yebhulorho ihlola igalelo kunye nokuchasana kwemveliso kunye nemilinganiselo kunye ne-ohmmeter kwipere nganye yegalelo kunye nesiphumo esikhokelela.Usebenzisa iinkcukacha zedatha yentsusa, thelekisa igalelo kunye nemveliso yokuchasana ukusuka kwi "negative output" ukuya "negative input", kunye "negative output" ukuya "plus input".Umahluko phakathi kwamaxabiso amabini kufuneka ube ngaphantsi okanye ulingane no-5 Ω.Ukuba akunjalo, kusenokubakho ucingo olwaphukileyo okanye olufutshane olubangelwa kumthwalo womothuko, ukungcangcazela, ukugqabhuka, okanye ubushushu obugqithisileyo.
Ukuchasa impembelelo:
Iiseli zomthwalo kufuneka ziqhagamshelwe kumthombo wamandla ozinzileyo.Emva koko usebenzisa i-voltmeter, qhagamshela kwi-output lead okanye i-terminals.Lumka, tyhala iiseli zomthwalo okanye iirola ukwazisa umthwalo omncinci womothuko, ulumkele ukuba ungafaki imithwalo egqithisileyo.Qwalasela ukuzinza kokufunda kwaye ubuyele ku-zero balance of the original.Ukuba ukufundwa kuphosakele, kunokubonisa uqhagamshelo lombane olungaphumeleliyo okanye umbane odlulayo unokonakalisa ibhondi phakathi kwe-strain gauge kunye necandelo.
Ixesha lokuposa: May-24-2023
