Definition
Digital Multi meter is a device used to measure multiple electrical quantities such as Current, Voltage, Resistance, Capacitance, Diode values, Transistors etc. It can also be used to check different electronic devices such as capacitor, transistor and diodes etc.
Construction
Digital Multimeter is a combination of complex electronics parts such as digital display as LCD, Analog to Digital Converter (ADC), Comparator, Encoder, Logic components etc.
Working Principle
Digital Multimeter (DMM Meter) measures voltage using Analog to Digital Converter (ADC).
Functions
To measure the basic electrical quantities as well as test various electronic components such as diode, transistor and capacitors etc.
Measuring Abilities
Mostly, DMM meter can measures basic and advance electrical quantities such as current, resistance, voltage, capacitance, inductance etc. It can be also used to check of a diode and transistor etc are OK or faulty.
Reading
Digital Multi meter shows reading on a digital display (LCD) in the form of numeric values.
Calibration
Digital Multi meters provide automatic calibration.
Accuracy
Digital Multi meters are most accurate as compared to analog multi meters.
Resolution
Inferior resolution and accuracy (±3% in common).
Range
Modern Digital multimeters have the auto ranging features.
Ω Range
Each range is the maximum which is up to 20MΩ (mega Ohms).
Frequency Range
Highest frequencies ranges can be measured by Digital Multi meter as compared to Analog multimeters.
Input Resistance
Input resistance is not constant in analog multi meters. i.e. it changes with range.
Input Signals
Digital Meters has ability to accept multiple input signals and user can chose the desired one by adjustable display.
Zero Ω Adjustment
Zero Ohm adjustment changes with each range in Analog Multi meter.
Reverse Polarity
Digital Multimeter indicates a negative (-) quantity when the polarity is reversed.
Power Supply
Power Source is required to use the Digital Multimeter for measurement.
Applications
Digital Multimeters are used to test and measure:
Digital Multi meter is a device used to measure multiple electrical quantities such as Current, Voltage, Resistance, Capacitance, Diode values, Transistors etc. It can also be used to check different electronic devices such as capacitor, transistor and diodes etc.
Construction
Digital Multimeter is a combination of complex electronics parts such as digital display as LCD, Analog to Digital Converter (ADC), Comparator, Encoder, Logic components etc.
Working Principle
Digital Multimeter (DMM Meter) measures voltage using Analog to Digital Converter (ADC).
Functions
To measure the basic electrical quantities as well as test various electronic components such as diode, transistor and capacitors etc.
Measuring Abilities
Mostly, DMM meter can measures basic and advance electrical quantities such as current, resistance, voltage, capacitance, inductance etc. It can be also used to check of a diode and transistor etc are OK or faulty.
Reading
Digital Multi meter shows reading on a digital display (LCD) in the form of numeric values.
Calibration
Digital Multi meters provide automatic calibration.
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| Digital Multi meter |
Digital Multi meters are most accurate as compared to analog multi meters.
Resolution
Inferior resolution and accuracy (±3% in common).
Range
Modern Digital multimeters have the auto ranging features.
Ω Range
Each range is the maximum which is up to 20MΩ (mega Ohms).
Frequency Range
Highest frequencies ranges can be measured by Digital Multi meter as compared to Analog multimeters.
Input Resistance
Input resistance is not constant in analog multi meters. i.e. it changes with range.
Input Signals
Digital Meters has ability to accept multiple input signals and user can chose the desired one by adjustable display.
Zero Ω Adjustment
Zero Ohm adjustment changes with each range in Analog Multi meter.
Digital Multimeter indicates a negative (-) quantity when the polarity is reversed.
Power Supply
Power Source is required to use the Digital Multimeter for measurement.
Applications
Digital Multimeters are used to test and measure:
- Current
- Voltage
- Resistance
- impedance
- Capacitance
- Diode Testing
- Transistor Testing
- Capacitor Testing and even more features.
, current (amps) and resistance (ohms). It is a standard diagnostic tool for technicians in the electrical/electronic industries.){kind=link}
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