Introduction to Measurement Range and Measurement Rate of Digital Multimeters
The display digits of a digital multimeter are usually 3 1/2 to 8 1/2 digits. There are two principles for determining the display digits of a digital instrument: firstly, the digits that can display all numbers from 0-9 are integer digits; The second point is that the value of the fractional digit is based on the highest digit in the maximum displayed value as the numerator. When measured at full range, the value is 2000, indicating that the instrument has 3 integer digits. The numerator of the fractional digit is 1, and the denominator is 2, so it is called 3 1/2 digit, which is read as "three and a half digits". The highest digit can only display 0 or 1 (0 is usually not displayed). The highest digit of the 3 2/3 digit (pronounced as "3 and 2/3 digits") digital multimeter can only display numbers from 0 to 2, so the maximum displayed value is ± 2999. In the same situation, it has a 50% higher limit than a 3 1/2 digit digital multimeter, especially valuable for measuring 380V AC voltage.
Universal digital multimeters generally belong to handheld multimeters with 3 1/2 digit displays, while 4 1/2 and 5 1/2 digit (below 6 digits) digital multimeters are divided into handheld and desktop types. More than 6 1/2 digits are mostly desktop digital multimeters.
The digital multimeter adopts advanced digital display technology, with clear and intuitive display and accurate reading. It can ensure the objectivity of readings and conform to people's reading habits, which can shorten the reading or recording time. These advantages are not possessed by traditional analog (i.e. pointer) multimeters.
