Apart from these, a digital multimeter can also measure temperature, frequency, capacitance, continuity, transistor gains etc.Ī typical DMM has a rotary switch, digital display and connecting jacks for the probes. The standard measurements that are performed by a DMM are current, voltage and resistance. Therefore, it is necessary to connect probes correctly.Ī digital multimeter (DMM) is a measuring instrument used to measure various electrical quantities. Multiple scales, these can cause confusion.Īnalog multimeters do not have auto-polarity function. It gives the continuous reading, thus a sudden change in signal can be detected which is not possible with digital multimeter.Īll measurement can be made using a single meter only. In this way if the meter is accidently connected across a high voltage point, there is a little chance of damage to the multimeter. Once the measurement is completed, it is wise precaution to place the probes into the voltage measurement sockets and set the range to maximum voltage. The range of multimeter is then optimised for the best reading. While selecting the range, ensure that the maximum range is above than that is expected. Set switch to the correct measurement types and range for the measurement to be made. Insert the probes into the correct connections. But, if resistance is to be measured, batteries need to be installed in the multimeter.
Volt meter analog how to#
With the knowledge of how to make voltage, current and resistance measurements, it is only necessary to know how to use the analog multimeter.įor the measurement of current and voltage, there is no need of batteries in the analog multimeter. The analog multimeter is very easy to use. It also has a rotary range-selector switch to choose a particular range of current, voltage and resistance. Here, two switches S1 and S2 are used to select the desired meter. By changing the value of shunt resistance in resistor network, different values of resistances can be measured.īy adding a rectifier unit in the analog multimeter circuit, the AC voltages and currents can also be measured. With the shunt resistor, an analog multimeter can measure currents in the ranges of milli-amperes or amperes.īy adding a multiplier resistor an analog multimeter becomes a voltmeter and can be used for the measurement of DC voltage in the ranges of milli-volts or kilo volts.īy adding a battery and a network of resistors, the analog multimeter can work as an ohmmeter. For high currents measurement, a shunt resistor is connected in parallel with the galvanometer.
Volt meter analog series#
The analog multimeter acts as an ammeter with a low series resistance to measure direct current. Analog Multimeter Measuring QuantitiesĪ typical analog multimeter can measure following electrical quantities − A pair of hairsprings is attached to the spindle to provide the controlling torque. When current flows in the coil, a deflecting torque acts on the coil that will rotate it by an angle, so the pointer moves over a scale. Since, the analog multimeter is a PMMC types instrument, so when a current is passed through its coil, the coil moves in a magnetic field produced by the permanent magnet. The pointer deflects from its initial position increasingly as the measuring quantity increases. The analog multimeter has an analog display that uses the deflection of a pointer on the scale to indicate the level of measurement being made. It works on the principle of d’Arsonval galvanometer. On the basis of output representation, there are two types of multimeters −Īn analog multimeter is a permanent magnet moving coil (PMMC) meter type measuring instrument. As the name implies, a multimeter is device that can be used to measure multiple quantities, i.e., when a single device is used to measure multiple quantities, the device is called multimeter.
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