Introduction to  DMM  digital multimeter:

Product Name:  DMM  digital multimeter

Weight: 300 grams

Unit of measurement: Taiwan

Scope of application: Measurement of voltage, resistance and current.

Overview of DMM  digital multimeter:

The so-called  DMM  digital multimeter is also called a multimeter, also known as a comprehensive electricity meter. . A DMM  digital multimeter is an electronic instrument used in electrical measurements. A DMM  digital multimetercan have many special functions, but the main function is to measure voltage, resistance and current. To use  DMM digital multimeter  safely, the first step is to choose a  DMM  digital multimeter that is suitable for the application and meets the application environment. Once the proper DMM has been chosen, it's up to you to use it as normal for your application!

Common causes of DMM damage:

1. When the probe is still in the current jack, use it to measure the AC voltage.

2. In the resistance mode, test the AC power supply.

3. Withstand too high transients.

4. Exceeding the maximum input limit (voltage and current.

Types of  DMM  digital multimeter  protection circuits:

1. Automatic recovery protection. Some watch circuitry, when it detects an overload, protects the watch until the condition no longer exists. After the overload is removed, the Meter automatically returns to normal operation. It is usually used to protect the resistance function and avoid voltage overload.

2. There is no automatic recovery function. Some watches will protect the watch after detecting overload, but it will not automatically recover until the user takes corresponding measures, such as replacing the resistor, to resume use.

Features of DMM  digital multimeter  in terms of safety

1. Fuse current input protection

2. Use a high-energy fuse (600 volts or higher)

3. High voltage protection (500 volts or higher) in resistance mode

4. Voltage transient protection (6000 volts or higher)

5. Safely designed test leads, safety handles, etc.

6. Independent security certification

The main measurement methods of the  DMM  digital multimeter :

Two-wire resistance and four-wire resistance, and even true ohmic resistance measurement mode. It is well known that four-wire resistance measurements eliminate the effects of lead errors on two-wire resistance measurements. In practical applications, most calibrators have two-wire and four-wire compensation functions to eliminate the influence of wire errors and improve measurement accuracy; however, improper operation will lead to incorrect calibration measurement results.

How a DMM  digital multimeter works:

The function of measuring voltage, current and resistance is realized through the conversion circuit part, and the measurement of current and resistance is based on the measurement of voltage, that is to say,  DMM  digital multimeter is expanded on the basis of the digital DC voltmeter. The converter converts the analog voltage that changes continuously with time into a digital quantity, and then the electronic counter counts the digital quantity to obtain the measurement result, and then displays the measurement result by the decoding display circuit. The logic control circuit controls the coordinated work of the circuit, and completes the entire measurement process in sequence under the action of the clock.

Precautions for the use of  DMM digital multimeter:

1. Pay attention to check the battery voltage, if the LCD shows that the voltage is low, you should replace the battery before using it

2. When the black test lead is inserted into M to measure voltage, resistance or current, and the red test lead is inserted into V/Ω or A respectively to measure the triode and capacitor, 3. Insert the triode and capacitor into the corresponding sockets respectively

3. Select the appropriate measurement file according to the measurement object

4. When measuring resistance, the resistance should not be charged; when measuring larger capacitance, the capacitor should be short-circuited and discharged first

Warm tip: Due to the continuous upgrade of DMM digital multimeter,  DMM digital multimeter picture 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: