To Measure Currents:
A multimeter specifically a digital multimeter can work as an ammeter when placed in chain with electrical component or current flowing wire. When it is brought into play as an ammeter, the digital multimeter will have nearly a negligible resistance, resulting in a very small voltage drop across the multimeter leads. Also there are various digital multimeters which are competent of testing both AC and DC currents.
To Measure Resistance:
Multimeter is also used as an ohmmeter to evaluate the resistance of an electrical component. The terminals are fixed across the electrical element, whose resistance is to be measured. On switching on the digital multimeter develops a minute known voltage flanked by its terminals and the resistor is connected across these terminals a current will start to flow, which can be calculated using Ohm’s Law. There are some digital multimeters existing in the market which are used to measure both 2-wire and 4-wire resistance measurements.
For Measuring Continuity and Frequency:
Multimeter are the great option to measure connection between two points of a circuit and to track circuit breaks. The multimeters, have a continuity setting that shows the flow of current between the points. There are also many places where a multimeter can also be used to measure some of the crucial parameter of electrical devices like measuring the frequency. This is done by joining the positive terminal to the electrical component with the signal and the negative lead to ground.
Beside the above uses a multimeter can also be used to troubleshoot electrical problems in a wide range of household and industrial devices such as, motor controls, electronic equipment, power supplies domestic appliances and wiring systems.