Explanation of how to use a multimeter to detect the remaining battery power
A multimeter can not only be used to measure the resistance of the object being measured, but also to measure AC and DC voltage. Some multimeters can even measure the main parameters of transistors and the capacitance of capacitors. Fully mastering the use of a multimeter is one of the most basic skills in electronic technology. Common multimeter types include pointer type multimeter and digital multimeter. A pointer type multimeter is a multifunctional measuring instrument with a meter head as the core component, and the measured value is read by the pointer of the meter head. The measured values of a digital multimeter are directly displayed in digital form on the LCD screen, making it easy to read. Some also have voice prompts. A multimeter is a common meter that integrates a voltmeter, ammeter, and ohmmeter.
The DC current range of a multimeter is a multi range DC voltmeter. The parallel connection of the meter head with a closed circuit voltage divider resistor can expand its voltage range. The DC voltage range of a multimeter is a multi range DC voltmeter. The voltage range can be expanded by connecting the meter head in series with a voltage divider resistor. The corresponding range varies depending on the voltage divider resistance. The head of the multimeter is a magnetoelectric measuring mechanism, which can only measure AC power through DC, using diodes to convert AC into DC.
Dry or rechargeable batteries at home, which have been used for a period of time or idle for a period of time, often make it difficult to determine the amount of remaining battery power. Based on personal experience, a digital multimeter can be used to conveniently measure the battery level.
Method/Step
A household digital multimeter can conveniently detect voltage, current, resistance, diodes, and so on. Some multimeters can also directly detect the battery level, which is very convenient. Today we are using a multimeter that does not have a direct battery detection function. We use a voltage detection file to detect the battery level.
To detect battery voltage, connect the red detection pen of the multimeter to the V Ω vA position, where V represents voltage detection; Connect the black pen to the COM file.
Let's take a look at the battery again. The nominal voltage of a typical No. 5 dry battery is 1.5V, and the nominal voltage of a rechargeable battery is 1.2V.
So when the multimeter is turned to the voltage detection gear, it can be directly turned to 2000mV, which is the maximum detection voltage of 2V.
Next, the multimeter detects that the pointer end of the pen contacts the battery. Remember to connect the red pen to the positive pole, which is the protruding end, and the black pen to the negative pole, which is the flat end.
It can be seen that the battery voltage is 1531mv, which is 1.53V, and the power is still very sufficient. Generally, below 1V may not be able to drive electric toys, alarm clocks, remote controls, and the like.
