WHAT IS AND WHAT IS A DIGITAL MULTIMETER FOR?

A digital multimeter (DMM) is a test tool used to measure two or more electrical values, primarily voltage (volts), current (amps), and resistance (ohms). It is a standard diagnostic tool for technicians in the electrical and electronic industries.

Test leads are flexible insulated leads and may or may not be attenuated (red for positive, black for negative) that plug into the DMM. They act as the conductor from the material under test to the multimeter. The test leads on each cable are used to test the circuits.

There are two types of analog and digital multimeters, the advantages of the latter lie in the fact that its measurement is digital and more accurate, as well as containing more advanced functions.

Digital multimeters may or may not contain a function and range selector knob to measure voltage, amperage, and resistance.

Choosing a multimeter is not always an easy task because it will depend on the use it will be given and the voltages to which it will be subjected. To do this, when buying a multimeter it is important to consider the following points:

• That can make measurements of minimum direct voltage of 200 vc.
• Make measurements of alternating voltage minimum of 440 vac.
• That can measure currents of at least 5 amps.
• Containing functions like continuity, diode test, 0 to 10 mega ohm resistance.

A multimeter can contain more useful functions such as NCV to know if there is voltage, NPN PNP transistor test, temperature measurement, capacitance and frequency measurement.

In the world of microelectronics it is important to attach needle or fine tips to this instrument in order to more easily measure SMD components.