The multimeter is divided into a digital multimeter and a pointer multimeter. It is an indispensable measuring instrument for power electronics and other departments. Generally, it is a multi-function, multi-range measuring instrument with the main purpose of measuring voltage, current and resistance. Whether it is digital or traditional, they all play an important role in the measurement, but what are the advantages and disadvantages of the two?
Pointer multimeter:
1. The pointer multimeter is an average meter with intuitive and visual reading instructions.
2. The pointer type multimeter generally has no internal amplifier, so the internal resistance is small.
3. The pointer type multimeter has a small internal resistance and a discrete component is used to form a shunt voltage dividing circuit, so the frequency characteristics are not uniform.
4. The internal structure of the pointer multimeter is simple, so the cost is low, the function is less, the maintenance is simple, and the overcurrent and overvoltage capability is strong.
5. The pointer type multimeter has high output voltage and large current, which can conveniently test thyristors and light-emitting diodes.
Digital multimeter:
1. The digital multimeter is an instantaneous sampling instrument. It takes a sample of 0.3 seconds to display the measurement result, and the reading result is not as convenient as the pointer.
2, digital multimeter Because the internal use of the op amp circuit, the internal resistance can be done very much, which makes the impact on the circuit under test can be smaller, the measurement accuracy is higher.
3, the digital multimeter uses a variety of oscillation amplification, frequency division, protection and other circuits, so there are more functions.
4, digital multimeter due to the internal structure of the use of integrated circuits, so the overload capacity is poor, generally not easy to repair after damage.
5. The digital multimeter has a low output voltage (usually no more than 1 volt), which is inconvenient for testing some components with special voltage characteristics, such as thyristors and light-emitting diodes.
So by comparing the above, we know the advantages and disadvantages of both digital multimeters and traditional multimeters. Therefore, in order to better eat the multimeter, Xiaobian suggested that for beginners, the pointer multimeter should be used. This can help new scholars to read data better and be familiar with usage.
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Input: 100-240V~50/60Hz.
CE FCC ROHS Certificated.
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Tip:(+)Center (-)Outer. Also can make (-)Center (+)Outer.
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