解決策は、時計の測定結果の品質を判断することです。 メーターの分解能を知ることで、測定されている信号に小さな変化が見られるかどうかを知ることができます。 たとえば、DMMの分解能が4Vの範囲で1mVの場合、1V信号を測定すると、1mV（1/1000ボルト）の小さな変化が見られます。
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.
桁数とワード数は、テーブルの解像度を説明するために使用されます。 マルチメータは、表示できる桁数と単語数によって分類されます。
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.
