Which is better to use, a pointer multimeter or a digital multimeter
1. Each display method has its own advantages: What is the first reaction of many people when they see a digital multimeter? I would definitely feel like, wow, this multimeter is so great. Once measured, it can be directly displayed in numbers without me having to read it. How convenient! Okay, this sentence was heard by an electrician who likes to use a pointer multimeter, and he retorted. The biggest advantage of a pointer watch is its pointer oscillation, which can intuitively extract changes in the properties of the measured object, and is actually more convenient than a digital watch.
From the above point of view, it can be said that it is difficult to distinguish between the two. However, a digital watch has a more prominent feature, which is that it can generally be made very small and portable, which is slightly better than a pointer watch. As for the issue of backlight, I think some better forehead pointer watches are also available, so that's not a big deal.
2. There are differences in design purposes: Generally speaking, people subconsciously feel that a digital multimeter is a tool suitable for measuring precision instrument devices. For purposes such as small overloads, the accuracy of a digital multimeter is also relatively intuitive and more accurate compared to a pointer multimeter. People think that pointer multimeters are suitable for measuring large overloads (which is also related to the working principle of pointers). So it also depends on the nature of the electrician's work and the commonly used measuring objects of a multimeter. As for the issue of resistance to falling, I personally think a digital watch is slightly better, as the swinging pointer is a precise and flexible physical device.
Selection of pointer multimeter and digital multimeter:
1. A pointer multimeter is an average type instrument. It is intuitive. Visual reading indication. (Generally, the reading value is closely related to the angle of pointer swing, so it is very intuitive).
A digital multimeter is an instantaneous sampling instrument. It uses a sample taken every 0.3 seconds to display the measurement results. Sometimes the results of each sampling are only very similar. Not exactly the same. This is not as convenient as pointer based for reading results.
2. A pointer multimeter generally does not have an amplifier inside. So the internal resistance is small. For example, the MF-10 model has a DC voltage sensitivity of 100 kiloohms/volt. This is considered excellent. The DC voltage sensitivity of the MF-500 model is 20 kiloohms/volt.
The digital multimeter uses an operational amplifier circuit internally. Internal resistance can be very large. Often at 1M euros or greater. (i.e. higher sensitivity can be obtained). This allows for a smaller impact on the tested circuit. High measurement accuracy.
