How to Choose a Satisfactory Multimeter
Before making a choice, it is necessary to determine what values need to be measured. Do you do precision measurement work? Do you really use the 7th or 8th digit for measurement? If so, you should choose a high-precision tabletop digital multimeter because it has good stability. If you want to use it in a customized system, you can choose a 6 1/2 f-bit digital multimeter that is compatible with PXI and VXI. Generally speaking, there are many digital multimeters with high accuracy and resolution, but the required measurement results do not necessarily have such high accuracy and resolution. Although resolution is a performance factor in design, achieving high-precision measurements ultimately depends on the quality of the measurement technology. For example, when using an 8 1/2 digit multimeter for measurement, one must be very careful and experienced, otherwise just having a * * digit multimeter may not necessarily yield good results. On the other hand, many low-end digital multimeters may also be suitable choices. If only a measurement accuracy of 5% is required and there are not many measurement functions, then choose a low-end digital multimeter. The basic quantities that can be measured by a digital multimeter are AC and DC voltage, current, and resistance. Some people's measurement needs fall between the two extreme situations mentioned above. It's difficult to make a decision on what kind of digital multimeter to choose. Because they require high measurement accuracy and resolution, as well as affordable prices. To make the best choice, it is recommended that they carefully read the instruction manual and relevant footnote materials. There are various high-precision tabletop digital multimeters and low-end handheld digital multimeters available for reading small font footnotes. However, the technical indicators of various digital multimeters lack consistency in their expressions. For example, the accuracy of DC voltage is sometimes expressed as% of the reading plus% of the range. Some are expressed as% of the reading plus a few counts, while others are expressed as% of the reading plus a few volts. For a specific type of digital multimeter, if you know how many counts correspond to its saturation value, you can convert one expression into another. The above three expressions are often seen.
