How to choose a multimeter and tips for selecting a multimeter based on gear selection
Sensitivity is a very important parameter for a multimeter. A multimeter with high sensitivity generally has high accuracy.
Precautions for purchasing a multimeter:
For electronics enthusiasts who mainly focus on home appliance maintenance, it is more suitable to choose a multimeter with a DC voltage sensitivity of 20k Ω/V (also commonly written as ⒛ 000 Ω/V).
The resistance gear is the most frequently used gear for radio enthusiasts, and special attention should be paid to the range setting of this gear when choosing. From: Home of Electrical Technology
The selected multimeter should generally have an R × 1. R × LO, R × 100, R × 1k, R × 10k five resistance ranges, where R × 10k gear requires separate installation of 15V stacked batteries.
Practice has proven that R × The 10k range has many uses, such as measuring the insulation condition of devices, estimating the voltage stabilizing value of voltage stabilizing tubes, and directly measuring capacitance between 0.601 and 1 ptF.
The DC voltage range and DC current range are also commonly used. When selecting, attention should be paid to whether the range settings of these two ranges are complete, reasonable, and in accordance with one's own usage habits. The DC voltage should be in the range of 2.5-500V, while the DC current should be in the range of 1mA-2.5A.
For AC voltage range, the first consideration should be to measure the mains voltage conveniently and accurately, so it is best to have a 250V range. As for other gears, although the settings of various multimeters may vary, they generally meet the needs.
In the maintenance process of electronic equipment, it is often necessary to use a multimeter to measure the potential at a certain point or voltage at two points in the circuit to determine whether the circuit is working properly.
It is necessary for testers to choose a multimeter reasonably, minimize measurement errors, and ensure that the measurement results accurately reflect the working status of the circuit, providing the correct basis for troubleshooting.
