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The pointer multimeter is an average meter with an intuitive, visual reading. (The general reading value is closely related to the angle of the pointer swing, so it is very intuitive).
Digital multimeters are instantaneous style meters. It takes 0.3 seconds to take a sample to display the measurement results. Sometimes the sampling results are only very similar, not exactly the same, which is not as convenient as the pointer.
The pointer multimeter generally has no internal amplifier, so the internal resistance is small, such as the MF-10 type, and the DC voltage sensitivity is 100 kΩ/V. The MF-500 has a DC voltage sensitivity of 20 kΩ/V.
Digital multimeters Due to the internal use of op amp circuits, the internal resistance can be made very large, often at 1M ohm or greater. (ie, you can get higher sensitivity). This makes the impact on the circuit under test smaller and the measurement accuracy higher.
The pointer type multimeter has a small internal resistance and a discrete component is used to form a shunt voltage dividing circuit. Therefore, the frequency characteristics are not uniform (relative to digital), and the frequency characteristics of the pointer multimeter are relatively better.
The pointer type multimeter has a simple internal structure, so the cost is low, the function is small, the maintenance is simple, and the overcurrent and overvoltage capability is strong. The digital multimeter uses a variety of internal oscillations, amplification, frequency division protection and other circuits, so there are many functions. For example, you can measure temperature, frequency (in a lower range), capacitance, inductance, signal generator, and so on.
Due to the internal structure of the digital multimeter, the digital multimeter has a poor overload capability (although some of them can be automatically shifted, automatically protected, etc., but the use is more complicated), and it is generally not easy to repair after damage. The digital multimeter has a low output voltage (typically no more than 1 volt). It is inconvenient to test some components with special voltage characteristics (such as thyristors, light-emitting diodes, etc.).
The pointer multimeter has a higher output voltage (10.5 volts, 12 volts, etc.). The current is also large (such as MF-500*1 ohms maximum 100 mA or so) can easily test thyristors, LEDs and so on.
Comparison of Pointer Multimeters and Digital Multimeters Both pointer and digital multimeters have advantages and disadvantages.