Taw qhia rau txoj kev siv lub multimeter los kuaj xyuas lub xov tooj ntawm tes
Cov khoom hnyav (siv cov khoom siv xws li siv cov nplais, cov nplai hauv pem teb, cov nplais hluav taws xob, cov nplai tib neeg, thiab lwm yam), kev ntsuas kev quab yuam, thiab kev ntsuas qhov nro thiab ntsuas siab yog siv rau cov khoom thauj. Lub load cell feem ntau ua tsis tau raws li hauv qab no thaum siv hauv thaj teb.
1. Lub sensor yog overloaded, tus neeg siv thiab cov chaw tsim tshuaj paus tsis tau sib txuas lus zoo, lub sensor ntau thiab lub zog tiag tiag tus nqi, raws li zoo raws li qhov hnyav, tsis sib xws, uas ua rau lub sensor overloaded, ua rau cov tsis kam ntawm lub sensor. txuas caj npab kom khoov, thiab ua rau lub voj voog tsis sib haum. Lub teeb liab tso zis viav vias, qhov kev tiv thaiv tsis muaj qhov kawg, thiab lwm yam teeb meem nrog lub sensor tiv thaiv nws los ntawm kev ua haujlwm ib txwm.
2. Lub sensor cov hlau lead yog tawg, thiab tus neeg siv ua tsis tau tej yam kev ceev faj thaum siv lub sensor. Lub sensor cov hlau lead yog puas lawm. Feem ntau, lub sensor tsis tuaj yeem siv yam tsis tau teb, lossis ntsuas tus nqi hloov pauv sai sai, thaum lub ntsuas hluav taws xob xaim sib cuag tawg.
3. Tsis siv lub sensor. Qhov cuam tshuam, shearing, thiab torsion rog tau ntsib thaum siv lub ntsuas hluav taws xob zoo li qub ua mob hnyav rau nws thiab ua rau nws tsis tuaj yeem kho.
Yog li yuav ua li cas peb thiaj li siv tau cov multimeter kom paub qhov ua txhaum ntawm cov khoom thauj ntawm qhov chaw?
1. Ua ntej tawm hauv lub Hoobkas, cov chaw tsim khoom sensor qhia txog qhov ntsuas qhov tso zis rhiab heev thiab lub zog hluav taws xob voltage. Raws li ob yam no, peb tuaj yeem ntes cov teeb liab tawm ntawm lub sensor. Lub millivolt voltage tso tawm los ntawm lub strain gauge load cell yog ib tug analog teeb liab. Piv txwv li, lub hwj chim mov voltage yog DC10V thiab lub sensor tso zis rhiab heev yog 2.0mV/V. Lub sensor tso zis teeb liab sib raug rau ib qho kev sib raug zoo ntawm 2.0 mV ib 1V excitation voltage, thiab sensor excitation voltage yuav txiav txim tau los ntawm ob qhov tsis, uas yuav tsum tau DC10V. Piv txwv li, yog tias lub ntsuas qhov ntsuas tag nrho yog 50KG, tag nrho cov nplai DC10V qhov hluav taws xob tso tawm rau lub sensor yog 20mV.Peb ntsuas lub ntsuas hluav taws xob tso zis teeb liab siv lub multimeter's mV iav raws li qhov kev sib raug zoo no. Lub sensor tsis muaj qhov tso tawm yuav tsum feem ntau yog 0 mV, uas yog ntau tshaj tab sis ze rau daim duab no. Tus nqi hloov pauv qhia tias lub sensor muaj xoom drift. Lub sensor puas lawm los yog tus choj sab hauv yog ib lub voj voog yog tias tus nqi siab thiab qhov kev tiv thaiv ntawm tus choj caj npab tsis sib npaug.
2. Txiav txim siab seb lub ntsuas ntsuas qhov ntsuas qhov ntsuas puas puas raws li qhov ntsuas qhov ntsuas, qhov kev tawm tswv yim, thiab cov zis tsis kam muab los ntawm lub sensor. Manufacturers siv ib tug ntau yam ntawm sensor input thiab output resistance theem. Yog li ntawd, qhov no yuav tsum tau sim ua raws li cov neeg tsim khoom daim ntawv lo. Thaum siv lub tshuab multimeter, nrhiav txoj haujlwm ohm, lub zog hluav taws xob thiab av tsis kam, thiab cov teeb liab kab thiab av tsis kam. Lub ntsuas ntsuas yog deformed thiab lub sensor tau overloaded yog tias nws loj dua lub Hoobkas tsis kam nqi. Lub sensor strain gauge raug mob hnyav thiab tsis tuaj yeem kho yog tias tus nqi tiv thaiv tsis kawg.
3. Vim hais tias cov hlau lead ntawm lub sensor feem ntau tawg thaum nws siv, tab sis txheej txheej ntawm sheath hlau tseem nyob rau hauv tact, lub sensor hlau yuav pom tau tias tsis zoo. Lub multimeter's ohm iav yog siv los kuaj xyuas qhov ntsuas hluav taws xob txuas ntxiv. Txiav txim siab qhov kev so yog tias qhov kev tawm tsam tsis kawg; yog tias nws hloov pauv, ua rau kev sib cuag tsis zoo.
