Acidity Test of Transformer Insulating Oil
Discharging a Capacitor
Charging a CapacitorClosely Related Articles
Digital Frequency Meter
Electrical Measuring Instruments | Types Accuracy Precision Resolution Speed
Cathode Ray Oscilloscope | CRO
Errors in Measurement | Classification of Errors
Lissajous Patterns of CRO or Cathode Ray Oscilloscope
Frequency Limitation of an Oscilloscope
Permanent Magnet Moving Coil Instrument or PMMC Instrument
Characteristics of Sensors
Moving Iron Instrument
Induction Type Meters
Measurement of Voltage Current and Frequency by Oscilloscope
Electrostatic Type Instruments Construction Principle Torque Equation
What is Low Power Factor Wattmeter ?
Resistance Temperature Detector or RTD | Construction and Working Principle
Energy Meter with Lag Adjustment Devices
Rectifier Type Instrument | Construction Principle of Operation
Digital Storage Oscilloscope
Electrodynamometer Type Wattmeter
Thermocouple type Instruments Construction Principle of Operation
Double Beam Oscilloscope
Protection of Meters
Measurement of Three Phase Power
Bimetallic Strip Thermometer
Varmeter | Single Phase and Polyphase Varmeter
Thermocouple Temperature Measurement
Megger | Working Principle Types History Uses of Megger
Radiation Pyrometer | Types Working Principle
Weston Type Frequency Meter
Power Factor Meters | Electrodynamometer Type Power Factor Meter
Phase Sequence Indicator
Ammeter Working Principle and Types of Ammeter
Insulation Resistance Test and Polarization Index Test
Tan Delta Test |Loss Angle Test | Dissipation Factor Test
Electronic DC Voltmeter
Working Principle of Voltmeter and Types of Voltmeter
RC Phase Shift Oscillator
Digital Voltmeters Working Principle of Digital Voltmeter
Wien Bridge Oscillator
Measurement of Electrical Energy
Energy Meter Testing
Construction of AC Energy Meter
Watt Hour Meter
Vector Impedance Meter
How to Use a Digital Multimeter?
Voltage Controlled Oscillator
Wheatstone Bridge Circuit Theory and Principle
Kelvin Bridge Circuit | Kelvin Double Bridge
Maxwell Bridge Inductance Capacitance Bridge
Anderson′s Bridge | Advantages Disadvantages of Anderson′s Bridge
Hay′s Bridge Circuit Theory Phasor Diagram Advantages Applications
Owens Bridge Circuit and Advantages
Schering Bridge Measurement of Capacitance using Schering Bridge
De Sauty Bridge
Heaviside Bridge Circuit
Blavier Test | Murray Loop Test | Varley Loop Test | Fisher Loop Test
Sensor | Types of Sensor
Temperature Sensor Temperature Measurement | Types of Temperature Sensor
Measurement of Resistance
How to Use a Digital Multimeter?
Here the probes are to be inserted into appropriate ports and are to be connected across the parameter which needs to be inspected. Meanwhile one should ensure that the selection switch is to be kept at the position which is appropriate for the measurement. When done so, the multimeter displays the value of the parameter which is being analyzed. Generally digital multimeters are used to measure three important parameters viz., current, voltage and resistance. Apart from these, they can also be used to perform special functions like diode check, capacitance measurement, Transistor hFE or DC current gain, frequency measurement and continuity check. In this article, we present a brief note on the most frequently used applications of multimeter which are for current, voltage and resistance measurement along with diode and continuity checks.
Current Measurement by Using a Digital MultimeterUnder this category, the digital multimeter mimics the behavior of an ammeter as it is used to measure current. To accomplish this, insert the red probe of the multimeter to one of the current measuring sockets: mA (to measure low level of current) or 20 A (to measure larger current). Connect the meter along the line through which the current is to be measured (nothing but series connection). Next set an approximate range around which we expect the current to be in the ammeter section of Figure 1. In this state, if we switch on the power supply, then the meter will read the current flowing through the circuit.
Voltage Measurement by Using a Digital MultimeterWhen set to measure the voltage, the multimeter acts like a voltmeter. To start with, one has to insert the red and the black probes of the multimeter to the sockets marked as ‘V’ and ‘COM’, respectively. Then we have to select the expected range in which our voltage would be. Simultaneously, even AC or DC should also be selected in the voltmeter section of Figure 1. On doing so, the meter reads the value of the voltage, provided one connects the leads across the component (in parallel fashion) or at the point at which the voltage needs to be measured.
Resistance Measurement by Using a Digital MultimeterIn this case, we configure the multimeter to act like an ohmmeter. Here the red and the black probes of the multimeter are inserted into the sockets marked as ‘V’ and ‘COM’, respectively while the selection switch is set to an expected range in ohmmeter region (Figure 1). Now, the leads need to be connected across the component whose resistance is to be known. On doing so, we get a reading in the display part of the multimeter which reads the value of the resistance.
Diode Check by Using a Digital MultimeterFor this case, insert the probes into the sockets as that in the case of voltage measurement and set the selection switch to point towards diode check position shown in Figure 1. Now when the red lead of the multimeter is connected to positive terminal of the diode while its negative lead is connected to the negative terminal of the diode, then we have to get a low reading on the multimeter. On the other hand, if we connect the red lead to the negative terminal of the diode and the black to the positive terminal, then we have to get a high value. If the readings obtained are as per our expectation, then we say that the diode is working properly; else no. More information regarding this can be found in the article “Diode testing”.
Continuity Check by Using a Digital MultimeterContinuity check is used to know whether there exists any low resistance path via two points i.e. to check whether the points are short or not. To accomplish this task, the probes are inserted into the sockets as that in the case of voltage measurement and selector switch is made to point towards continuity check position (Figure 1). Then, the points to be tested are touched with the leads of the probes. Now, if the multimeter beeps out, then it means that the points are shorted or else the resistance between them can be read out from the display.
Closely Related Articles Digital Frequency MeterElectrical Measuring Instruments | Types Accuracy Precision Resolution SpeedTransducer | Types of TransducerCathode Ray Oscilloscope | CROOhmmeter Working Principle of OhmmeterErrors in Measurement | Classification of ErrorsLissajous Patterns of CRO or Cathode Ray OscilloscopeFrequency Limitation of an OscilloscopePotentiometer Working Principle of PotentiometerPermanent Magnet Moving Coil Instrument or PMMC InstrumentCharacteristics of SensorsSignal GeneratorMoving Iron InstrumentInduction Type MetersMeasurement of Voltage Current and Frequency by OscilloscopeElectrostatic Type Instruments Construction Principle Torque EquationWhat is Low Power Factor Wattmeter ?Resistance Temperature Detector or RTD | Construction and Working PrincipleEnergy Meter with Lag Adjustment DevicesRectifier Type Instrument | Construction Principle of OperationThermistor Thermometer | Thermistor Temperature Sensor | Construction and Principle Digital Storage OscilloscopeElectrodynamometer Type WattmeterThermocouple type Instruments Construction Principle of OperationThermistor Definition Properties Construction Characteristics and Applications Double Beam OscilloscopeProtection of MetersMeasurement of Three Phase PowerBimetallic Strip ThermometerSampling OscilloscopeVarmeter | Single Phase and Polyphase VarmeterThermocouple Temperature MeasurementTemperature TransducersMegger | Working Principle Types History Uses of MeggerRadiation Pyrometer | Types Working PrincipleOptical Pyrometer | Construction and Working PrinciplePiezoelectric TransducerStrain GaugeWeston Type Frequency MeterPower Factor Meters | Electrodynamometer Type Power Factor MeterInductive TransducersPhase Sequence IndicatorAmmeter Working Principle and Types of AmmeterLinear Variable Differential Transformer LVDTOscillator TransducerDigital MultimeterInsulation Resistance Test and Polarization Index TestHartley OscillatorTan Delta Test |Loss Angle Test | Dissipation Factor TestColpitts OscillatorElectronic DC VoltmeterWorking Principle of Voltmeter and Types of VoltmeterClapp OscillatorRC Phase Shift OscillatorDigital Voltmeters Working Principle of Digital VoltmeterWien Bridge OscillatorMeasurement of Electrical EnergyGunn OscillatorEnergy Meter TestingCrystal OscillatorAC PotentiometerMonostable MultivibratorConstruction of AC Energy MeterBistable MultivibratorWatt Hour MeterCapacitance MeterWhat is an Oscillator?Vector Impedance MeterAstable MultivibratorVoltage Controlled Oscillator | VCOMore Related Articles Digital PotentiometersWheatstone Bridge Circuit Theory and PrincipleKelvin Bridge Circuit | Kelvin Double BridgeMaxwell Bridge Inductance Capacitance BridgeAnderson′s Bridge | Advantages Disadvantages of Anderson′s BridgeHay′s Bridge Circuit Theory Phasor Diagram Advantages ApplicationsOwens Bridge Circuit and AdvantagesSchering Bridge Measurement of Capacitance using Schering BridgeDe Sauty BridgeHeaviside Bridge CircuitBlavier Test | Murray Loop Test | Varley Loop Test | Fisher Loop TestSensor | Types of SensorTemperature Sensor Temperature Measurement | Types of Temperature SensorVoltage SensorMeasurement of ResistanceAir MeterWater MeterFlow MeasurementFlow MeterNew Articles Acidity Test of Transformer Insulating OilMagnetic FluxRing CounterDischarging a CapacitorCharging a Capacitor