What is the function of the multimeter buzzer for
1. What is the function of the buzzer used for?
Answer: The buzzer function is an additional function of a multimeter, usually set at 2K Ω. Generally, when measuring a circuit (or resistance) with a resistance value below 50 Ω, the built-in buzzer sounds. This function plays a significant role in practical applications and can improve the efficiency of measuring circuit continuity. It is a necessary function for electronic maintenance.
2. Why does a digital multimeter not return to zero when short-circuited in the 200 Ω range?
Answer: In the 200 Ω range, due to the presence of resistance values in the circuit, instrument internal resistance, and contact points, some tails are normal during short circuiting. This tail will become larger and cannot be adjusted during use, but the value can be reduced by wiping the circuit board and close contact points. You can short circuit it first during use, record the value, and subtract it from the measurement.
3. How to determine if a multimeter is good?
Answer: This is a relatively large problem, and trying out each functional range is a good method. When testing, it is necessary to first find the detection source, but it is not possible for users to provide their own standard detection source, so general testing can be measured using qualitative and quantitative methods. The basic solution is to find the detection source and use it once according to the instructions.
4. How to proofread a multimeter?
Answer: Like other measuring instruments, a multimeter is calibrated by the manufacturer before leaving the factory. Therefore, if there are no significant issues, please do not adjust it randomly. Nowadays, the head of a multimeter is usually a voltmeter, so when calibrating other gears, it is necessary to first adjust the DC voltage level. This level is referred to as the basic level by industry insiders. If this level is inaccurate, almost every gear and function (except for the resistance level) may be inaccurate. Generally, a multimeter will set one potentiometer (such as DC voltage range) or multiple potentiometers (such as temperature range) for each function, and there are also potentiometers that are not set (such as resistance range). If there is a potentiometer, it is easy to input the detection signal and then adjust it directly; Without a potentiometer, it is generally not inaccurate. In case of misalignment, it may be caused by damage to the instrument or poor circuit contact.
5. How to determine (detect) whether the DC voltage range (DCV) of a multimeter is good?
Answer: When conducting testing, we first need to find the testing source. As we conduct qualitative and quantitative measurements, there are many available testing sources. For household use, there are 1.5V alkaline/carbon batteries (No.1, No.5/AA, No.7/AAA), 1.2V charging pools, mobile phone chargers, power adapters, and so on. When testing, set the multimeter to the desired DC voltage range, insert the probe according to the instructions, connect the detection source, and read the reading on the LCD. As long as the measured value is around the nominal voltage, it is sufficient.、
