Yuav ua li cas xaiv ib tug multimeter raws li kev daws teeb meem sib txawv?
Kev daws teeb meem yog los txiav txim qhov zoo ntawm kev ntsuas ntsuas ntawm lub moos. Paub txog qhov kev daws teeb meem ntawm ib lub 'meter' cia koj paub yog tias koj tuaj yeem pom cov kev hloov me me ntawm cov teeb liab raug ntsuas. Yuav ua li cas xaiv ib tug multimeter raws li kev daws teeb meem sib txawv: Piv txwv li, yog tias DMM muaj qhov kev daws teeb meem ntawm 1mV tshaj li 4V ntau, koj tuaj yeem pom qhov hloov me me ntawm 1mV (1/1000 ntawm ib lub volt) thaum ntsuas 1V teeb liab
If you're measuring less than 1/4 inch (or 1mm) in length, you're definitely not going to use a ruler with the smallest units in inches (or centimeters). If the temperature is 98.6 degree F, it's useless to measure with a thermometer that only has integer marks. You need a thermometer with a resolution of 0.1 degree F.
Tus lej ntawm tus lej thiab cov lus yog siv los piav txog qhov kev daws teeb meem ntawm lub rooj. Multimeters yog categorized los ntawm cov lej thiab cov lus uas lawv tuaj yeem pom.
A 3-and-a-half-digit meter can display three full-digit digits from 0 to 9, and one half-digit (only 1 or no display). A 3½-digit digital meter can achieve a resolution of 1999 words. A 4½-digit digital meter can achieve a resolution of 19999 words.
The resolution of digital tables is better in words than in bits, and the resolution of 3½-digit tables has been increased to 3200 or 4000 words.
The 3200-word digital meter provides better resolution for some measurements. For example, a 1999 word meter, when measuring voltages greater than 200V, you can't display 0.1V. The 3200-character digital meter can still display 0.1V when measuring the voltage of 320V. When the measured voltage is higher than 320V and the resolution of 0.1V is to be achieved, an expensive 20,000-character digital meter should be used.
