When buying a multimeter, you must focus on the following points:
(1) Display mode
Digital multimeters are suitable for situations with relatively high measurement requirements; Analog multimeters are suitable for measuring situations with general requirements; There is now a dual display multimeter that combines analog and digital functions, suitable for testing situations with rich content. With the improvement of the measurement function and cost-effectiveness of digital multimeters, the use of pointer multimeters will become increasingly rare.
(2) Basic measurement
Basic measurement is a necessary range for a general multimeter, such as DC current, voltage range, AC voltage range, and resistance range. When necessary, consideration should be given to whether AC current measurement is necessary.
(3) Additional Range
Appropriately considering additional measurement ranges can bring many conveniences to daily maintenance, such as capacitor mode (some digital multimeters have a capacitance range of up to 2000), transistor static coefficient measurement mode, first gear testing mode, diode (DT) measurement mode, etc.
(4) Measurement accuracy.
If the measurement is a common requirement, the grade index can be chosen to be lower; If the instrument is used for repairing electronic circuits and requires better performance, the grade index should be slightly higher; If the instrument is used for scientific research, a higher
grade index should be selected.
Kind Reminder:
When purchasing a multimeter, if the price factor is not considered, the focus should be on meeting the specifications, while also considering the appearance and size. If used in a laboratory, products with larger volume, higher accuracy, and wider measurement range can be purchased. If it is frequently used outside and has good working conditions, buy a mid-range with a more luxurious appearance. If it is for outdoor construction use, buy a portable multimeter that is small in size, cheap in price, can meet general measurement needs, waterproof, mildew proof, and has a protective sheath. For researchers, an oscilloscope multimeter with both digital display and oscilloscope functions can be used.
