Introduction of main indicators, display digits and display characteristics of digital multimeter
The display number of digital multimeter is usually 3 1/2 to 8 1/2. There are two principles to determine the display digits of digital instruments: one is that the digits that can display all digits from 0 to 9 are integer digits; Secondly, the numerical value of the fractional bit takes the highest digit in the maximum displayed value as the numerator, and when the full scale is used, the counted value is 2000, which indicates that the instrument has three integer digits, while the numerator of the fractional bit is 1 and the denominator is 2, so it is called 3 1/2 digits, which is pronounced as "three and a half digits", and its highest digit can only display 0 or 1(0 is usually not displayed). 3 2/3 digits (pronounced "three and two thirds digits") The highest digit of the digital multimeter can only display digits from 0 to 2, so the maximum display value is 2999. Under the same conditions, it is 50% higher than the limit of the 3 1/2 digit digital multimeter, and it is very valuable especially for measuring 380V AC voltage.
Popular digital multimeters generally belong to hand-held multimeters with 3 1/2 bit display, and 4 1/2 and 5 1/2 bit (less than 6 bits) digital multimeters are divided into hand-held and desktop types. More than 6 1/2 digits mostly belong to desktop digital multimeter.
Digital multimeter adopts advanced digital display technology, which shows clearly and intuitively and reads accurately. It can not only ensure the objectivity of reading, but also conform to people's reading habits and shorten the reading or recording time. These advantages are not possessed by the traditional analog multimeter.
