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What are the indicators for describing a digital multimeter? What does it mean?
The 3 1/2 digital multimeter can display 0000-1999. The first digit can only display 1 or 0, 3 represents one digit, ten digits, hundreds digits can display 0-9 digits, 1/2 represents thousands digits. Can display 0 and 1. Read as "three and a half." This type of digital multimeter has Shenzhen Huayi's MY6; Ulead's UT54; Victory's VC890D and so on.
The digital multimeter's display digits are usually 3 1/2 digits to 8 1/2 digits. There are two principles for determining the number of digits displayed on a digital meter: one is that the number of digits from all digits from 0-9 is the whole digit; the second is that the fractional digit is the highest digit of the maximum display value. For the numerator, the count value is 2000 when the full scale is used, which indicates that the meter has 3 integer digits, and the fractional numerator is 1, and the denominator is 2, so it is called 3 1/2 digits, which is read as "three and a half. ", its highest bit can only display 0 or 1 (0 is usually not displayed). 3 2/3 digits (pronounced as "three and two-thirds") The highest digit of the digital multimeter can only display numbers from 0 to 2, so the maximum display value is ±2999. In the same situation, it is 50% higher than the 3 1/2 digit DMM, especially when measuring 380V AC voltage.
For example, when measuring the grid voltage with a digital multimeter, the highest bit of a normal 3 1/2 digit multimeter can only be 0 or 1. To measure the 220V or 380V grid voltage, only three digits can be displayed. The resolution of this file. Only 1V. In contrast, the 3 3/4 digit digital multimeter is used to measure the grid voltage. The highest bit can display 0~3, which can be displayed in four digits with a resolution of 0.1V, which is distinguished from the 4 1/2 digit digital multimeter. The same force.
The popular digital multimeter is generally a handheld multimeter with 3 1/2 digit display, and the 4 1/2, 5 1/2 digit (less than 6 digit) digital multimeter is divided into a handheld type and a desktop type. More than 6 1/2 digits are mostly desktop digital multimeters.
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