Opløsning er at bedømme kvaliteten af et urs måleresultater. At kende opløsningen af en måler fortæller dig, om du kan se små ændringer i signalet, der måles. For eksempel, hvis DMM'en har en opløsning på 1mV over et 4V-område, kan du se en lille ændring på 1mV (1/1000 af en volt), når du måler et 1V-signal
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.
Antallet af cifre og ord bruges til at beskrive tabellens opløsning. Multimetre er kategoriseret efter antallet af cifre og ord, de kan vise.
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.
