Peak Hold Function thiab Cov Txheej Txheem Ua Haujlwm rau Digital Multimeters
Lub npe hu ua "ncej tuav" muaj nuj nqi yog hais txog lub peev xwm digital los tuav tus nqi ntsuas tam sim no ntawm lub vijtsam zaub; Hauv lwm lo lus, qhov kev nyeem ntawv kawg ntawm qhov ntsuas yog tus nqi siab tshaj plaws hauv kev ntsuas tas li. Txoj haujlwm no tseem ceeb heev. Piv txwv li, qee zaum nws yog ib qho tsim nyog los kuaj xyuas qhov hluav taws xob ntawm ib qho chaw nyob rau hauv "qhov chaw txaus ntshai" (xws li cov pob qij txha sib txuas, qhov chaw luv luv ntawm cov pins uas nyob ib sab tuaj yeem ua rau qhov txhaum tshiab), thiab "ncej tuav" muaj nuj nqi tuaj yeem ua ke. Txoj kev kuaj xyuas tshwj xeeb yog raws li hauv qab no:
Muab cov multimeter digital tso rau hauv lub xeev "PH" thiab tsis quav ntsej cov ntsuas ntsuas tam sim no. Tsuas yog tsom ntsoov rau qhov kov qhov kev sojntsuam kom ruaj ntseg thiab ntseeg tau nrog qhov ntsuas qhov ntsuas, tom qab ntawd tso qhov kev sojntsuam thiab nyeem kom zoo.
Rau qee cov khoom siv uas muaj kev tiv thaiv tsis raug thaum pib, yog tias koj xav paub qhov voltage lossis tam sim no cov ntaub ntawv ntawm lub tshuab ntawm cov ntsiab lus tseem ceeb thaum lub sijhawm pib lub sijhawm luv luv, koj tuaj yeem siv lub ntsuas hluav taws xob tso rau hauv lub xeev "PH" los saib xyuas qhov voltage lossis tam sim no ntawm cov ntsiab lus tseem ceeb ua ntej. Tom qab lub tshuab tiv thaiv nres oscillating, koj tuaj yeem nyeem tus nqi siab tshaj plaws nyob rau lub sijhawm no rau kev tshuaj xyuas.
Cov lus qhia rau kev siv thiab tu
(1) Thaum siv lub tshuab hluav taws xob digital, qhov ua haujlwm raug thiab ntau yam yuav tsum raug xaiv ua ntej raws li cov kev qhia tshwj xeeb hauv phau ntawv. Thaum kuaj xyuas thiab kho, qhov txhaum yuav tsum tau kuaj xyuas thiab kho raws li nws cov tsos mob. Ua ntej, nws yuav tsum tau kuaj xyuas. Tom qab ntawd, raws li cov cim qhia ntawm kev ua haujlwm tsis zoo, cov duab logic, saib, thiab A / D converter tuaj yeem kuaj xyuas nyias.
(2) Yog tias ib qho kev ua haujlwm tsis zoo, xws li kev nyeem ntawv tsis raug thaum ntsuas tam sim no, thaum lwm yam haujlwm muaj tseeb thoob plaws txhua qhov. Obviously, qhov txhaum yuav tsum tau tshwm sim nyob rau hauv tam sim no mus rau voltage converter Circuit Court. Qhov no kuj yog nyob ntawm qhov siv lub teeb liab qhov chaw, thiab nws yog ib qho tsim nyog los xyuas thiab kho qhov teeb meem siv qhov chaw.
(3) Rau qhov digital logic, tsis tas yuav ua ib qho kev ntsuas, thaum rau qhov analog (tshwj xeeb tshaj yog nyob rau hauv A / D converters, resistors, thiab AC rau DC conversion circuits), calibration thiab hloov yuav tsum tau ua tom qab txhua yam hloov.
