What Is the Difference Between 3½-Digit and 4½-Digit Digital Multimeters?
Answer: Three and a half digits are also called 3 1/2 digits (pronounced as 3 and 1/2 digits), and four and a half digits are also called 4 1/2 digits (pronounced as 4 and 1/2 digits). We know that the accuracy of an analog quantity, after quantization and conversion to a number, is related to the number of digits. The more digits there are, the closer it is to the original value. (This is generally speaking, without considering other situations. If the quantized value is 1.00000V, representing it with one digit is the same as representing it with N digits.). So in general, the more digits there are, the more accurate it is, that is, four and a half digits are more accurate than three and a half digits.
How to use a multimeter to detect damaged electronic products or household appliances?
This question is very complex, or rather it confuses me. When it comes to electronic product maintenance, home appliance repair, or computer brain maintenance, everyone has their own methods and cannot generalize. In general, a multimeter is just a tool with many functions (that is, it can measure many parameters). By proficiently measuring the parameters of various circuits or components, and combining them, it can determine the location of faults. For example, by measuring the voltage of a certain section of the circuit to determine whether it is working properly; Determine if a component is functioning properly by measuring its resistance; By measuring the capacitance of a component, determine whether it is open, short, or deteriorated.... wait. So a multimeter is just a tool. After DIY fans buy it back, they should still bubble up various forums or participate in extracurricular classes to strengthen their own literacy and improve their tool usage ability. *For example, a multimeter is like a precious sword, and its power lies in its owner. With a certain percentage of martial arts (electronic knowledge), it can exert a certain percentage of its effectiveness.
