Qhov tseeb yog hais txog qhov ua yuam kev siab tshaj plaws hauv ib puag ncig siv tshwj xeeb. Hauv lwm lo lus, precision yog siv los qhia
Qhov kaw qhov DMM qhov ntsuas li cas rau tus nqi tiag tiag ntawm lub teeb liab raug ntsuas.
Rau DMMs, qhov tseeb feem ntau yog qhia raws li feem pua ntawm kev nyeem ntawv. Piv txwv li, lub ntsiab lus ntawm 1 feem pua ntawm kev nyeem ntawv qhov tseeb yog: thaum cov zaub ntawm digital multimeter yog 100.0V, qhov tseeb voltage yuav nyob nruab nrab ntawm 99.0V thiab 101.0V .
Cov txiaj ntsig tshwj xeeb yuav raug ntxiv rau qhov tseeb hauv cov lus piav qhia ntxaws. Nws lub ntsiab lus yog tus naj npawb ntawm cov lus uas yuav tsum tau ntxiv los hloov txoj cai kawg ntawm cov zaub. Hauv qhov piv txwv dhau los, qhov tseeb yuav raug cim tias ± (1 feem pua ntxiv rau 2). Yog li, yog GMM nyeem 100.0V, qhov tseeb voltage yuav nyob nruab nrab ntawm 98.8V thiab 101.2V.
Qhov tseeb ntawm ib qho analog meter yog xam nyob rau hauv cov nqe lus ntawm kev ua yuam kev tag nrho, tsis yog cov ntawv nyeem. Qhov raug raug ntawm cov ntsuas ntsuas analog yog ± 2 feem pua lossis ± 3 feem pua ntawm tag nrho cov nplai. Qhov tseeb qhov tseeb ntawm DMM yog nyob nruab nrab ntawm ±(0.7 feem pua ntxiv rau 1) thiab ±(0.1 feem pua ntxiv rau 1) kev nyeem ntawv, lossis ntau dua.
