Introduction to digital multimeter:
A digital multimeter is a multipurpose electronic measuring instrument that generally includes functions such as an ammeter, voltmeter, and ohmmeter, and is sometimes called a multimeter, multimeter, multimeter, or three-purpose meter.
Digital multimeters are portable devices suitable for basic fault diagnosis, and there are also devices placed on the workbench, and some resolutions can reach seven or eight digits.
A digital multimeter (DMM) is an electronic instrument used in electrical measurements. Digital multimeters can have many special functions, but the main function is to measure voltage, resistance and current. Digital multimeters, as modern multi-purpose electronic measuring instruments, are mainly used in physical, electrical, electronic and other measurement fields.
Digital Multimeter Buying Guide:
1. Accuracy index of digital multimeter
The accuracy of the digital multimeter directly affects the accuracy of the measurement results. When you get a digital multimeter, you should first analyze its accuracy technical indicators: one is to see if the accuracy of the meter can meet your own requirements, and the other is to check the overall quality of the meter. Performance analysis, do not think that the measurement accuracy of a 4-digit multimeter is necessarily higher than that of a 3.5-digit multimeter. The measurement accuracy of a rough-crafted 4.5-digit multimeter may be as good as that of a well-made 3.5-digit multimeter. The shop owner has encountered such a watch: a DT9103 4.5-digit multimeter produced by an unknown small factory. During the measurement process, the number jumps very badly, and it cannot meet the requirements of the technical indicators at all.
2. Product appearance of digital multimeter
A good digital multimeter can become a pleasing handicraft, no matter in terms of materials, injection molding process, circuit board, protective cover and other components, it should be as perfect as possible.
3. Check the items of the digital multimeter
After getting a digital multimeter:
First of all, you should check whether the case is intact, whether the switches and buttons are functioning normally and feel good.
Whether the toggle switch (measurement function selection) can be rotated flexibly, with proper damping and comfortable hand feeling, and whether the corresponding measurement function is normal.
Whether the LCD screen is clear, whether there are missing strokes, and the digital beating should be as small as possible.
Whether the buzzer can sound.
Fourth, the factors of reference digital multimeter
If you can open the case of the digital multimeter, you can pay attention to the design of the circuit board, the selected components, the level of installation and welding, etc. For a good digital multimeter, the design of the circuit board is very important, and the level of the selected components determines the number. Multimeter measurement accuracy, high-end digital multimeters often use SMD components to improve accuracy while reducing the size of the circuit board, and components in key parts are even screened. Not much to say about the level of welding. When purchasing a digital multimeter, you should also pay attention to some details, such as whether the safety protection of the digital multimeter, the product warranty of the digital multimeter, the test cable of the digital multimeter, the user manual of the digital multimeter, etc. are complete.
5. Performance testing of digital multimeter
When purchasing a digital multimeter, you can use the method of measuring known quantities (such as resistance, capacitance, battery voltage, AC voltage, etc.) to confirm the measurement function of the digital multimeter. item inspection and acceptance.
Warm tip: Due to the continuous upgrade of DMM digital multimeter, DMM digital multimeterpicture for reference only, details email consultation! More quality products welcome your consultation!
Dongguan Runzhi Electronics Co., LTD. - Testing Instrument Division, founded in 2011, is a high-tech enterprise with many years of professional electronic technology and instrument research and development professionals to set up a set of professional laboratory testing equipment, research, development, manufacturing.
Dongguan Runzhi Electronics Co., Ltd. mainly engaged in special instruments and equipment are: Laboratory environment test instrument, element detection instrument, floor residual pitting meter, lock size tester, straight Angle detector, microcomputer push tension meter, static bending strength testing machine, high-precision image projector, caster testing machine, falling ball tester, falling sand meter, 90 degree peeling strength testing machine, scratch resistance tester, wear resistance tester, gloss meter, whiteness meter, Energy meter, hydrometer, infrared thermometer, viscometer, thickness meter, depth meter, analytical balance, caliper, gauge and other instruments and equipment.
Dongguan Runzhi Electronics Co., Ltd. operating products with strong targeting, a wide variety of functions, excellent quality, adequate inventory, after-sales support and other advantages, welcome new and old customers all over the country to call to mail consultation:
Website: https://www.instrumentvip.com/
Tel: 86+13712847488
Contact person: Mr. Zheng
