Getting to Know Digital Multimeter Resolution
Resolution refers to the quality of a meter's measurement results. By understanding the resolution of a table, you can determine whether you can see small changes in the measured signal. For example, if the resolution of a digital multimeter is 1mV within the 4V range, then when measuring a 1V signal, you can see a small change of 1mV (1/1000 volts).
If you want to measure a length less than 1/4 inch (or 1 millimeter), you will definitely not use a ruler with * small units in inches (or centimeters). If the temperature is 98.6 ° F, measuring with a thermometer marked only as an integer is useless. You need a thermometer with a resolution of 0.1 ° F.
Digits and words are used to describe the resolution of a table. Numeric multimeters are classified based on the number of digits and words they can display.
A 3 and a half digit table can display three full digits from 0 to 9, and one half digit (only 1 or no display). A 3 and a half bit digital table can achieve a resolution of 1999 words. A four and a half digit number table can achieve a resolution of 19999 words.
Using words to describe the resolution of a digital table is better than using words to describe it. The resolution of a 3-and-a-half-digit table has been increased to 3200 or 4000 words.
The 3200 word digital table provides better resolution for certain measurements. For example, a 1999 word meter cannot display 0.1V when measuring voltages greater than 200V. The 3200 word digital meter can still display 0.1V when measuring a voltage of 320 volts. When the measured voltage is higher than 320V and a resolution of 0.1V is required, a more expensive 20000 word digital meter should be used.
