MULTIMETER

 The most important tool that is used by a person worked in electrical or electronics is a multimeter. Here we can see the application of multimeter, and how to use the multimeter, and also some interesting facts about the multimeter. There are many types and brands of multimeters are available in the market. There are two types of the multimeter is available in the market they are

• Analog multimeter
• Digital multimeter
  
  
  
  
  

  

  Analog Multimeter

  

  Digital Multimeter

  
  

The common parameter of a multimeter is to measure

• Voltage (ac and dc)
• Resistance
• Continuity mode
• Diode mode
• Milliamps (mA)
• Ampere  (A)

                                 In any multimeter when we measure the voltage there are two options are available they are Ac and Dc. Ac voltage is the live voltage that is available in the socket or the output of a transformer or from some special circuit. Dc voltage is the voltage that is available from a battery or an SMPS circuit. We must select the Ac or Dc before measuring the voltage. Then we must connect the terminals that may be mentioned in the meter. When we connect the wrong terminals this will kill your multimeter.

  Next, we are looking at the resistor parameter. For resistance measurement first, select the selector switch to resistance and connect the probe to correct terminals. In this mode, we can check the resistance of the resistor or checking the resistance of a device.

In the diode mode, we can check the diode is good or bad. In this mode the meter display the voltage dropped across the diode.

Next, we check the milliamps of a circuit by connecting the probe’s inappropriate position and the selector switch to milliamps. in this mode, we can only measure the current in milliampere rage. The high current will be damage your multimeter in this selection.

In the amper mode, we can measure some levels of current that are mentioned in the meter. If we want to measure high levels of current some other meter is required. We can use a clamp meter for measuring high currents. When we measure more value of current in the multimeter an inbuilt fuse will be burned inside the meter.

The continuity mode is one of the modes mostly used for the identification of a fault. If the two points are connecter by the probe is good for electrical continuity then the meter shows the resistance value and a beep sound will be generated otherwise shows an open circuit and doesn’t make sounds. This mode is used to find fault in PCB tracks etc…

In some meters, we can also measure the frequency, temperature, capacitance, inductance, etc...