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Digital multimeter
This document provides an overview of how to use a digital multimeter. It describes the basic components and functions of a multimeter. A digital multimeter contains three meters in one - a voltmeter to measure voltage, an ohmmeter to measure resistance, and an ammeter to measure current. It has a digital display and a function switch dial to select the meter's function. The function switch has settings for measuring DC and AC voltage, resistance, and current. The document explains how to set the function switch to the proper setting and range for measuring voltage, resistance, and current.
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Digital multimeter
- 1. PRESENTED BY:- VivekPathak (1409904) Priyank Patel (1409906) Hemal Mistry (1409912) Ankit Patel (1409909)
- 2. QQuuiicckk OOvveerrvviieeww Thedigital multimeter is a versatile instrument that contains three different meters in one. • 1. A voltmeter measures the voltage across a component (in volts). 2. An ohmmeter measures the resistance of a component (in ohms). • 3. An ammeter measures the amount of current through a component (in amperes, or amps).
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- 4. Digital Multimeter Layout • The top portion of the meter contains the digital readout area which displays the measurement value. Below the digital readout is a black dial, called the FUNCTION switch. • The FUNCTION switch dial is turned to select the meter’s function . i.e. voltmeter, ammeter, or ohmmeter.
- 5. Function Switch Dial There are eight different functions to choose from on the function switch. The first is OFF. The meter should always be returned to this position when not in use. • The V markings are for measuring DC and AC voltage • The Ω marking is for measuring resistance. • The A marking is for measuring current.
- 6. Function Switch MeasuringVoltage The V~ (*) setting is for measuring AC voltages. Eg. house voltage * * * V V • The V– (*) setting is for measuring DC voltages. Eg. battery voltage. • The 20 (*) setting is to measure DC voltages in the volts (V) range.
- 7. Set the dialto the a value greater than the voltage being measured. For our labs, we will be working with the 20 V range.
- 8. Function Switch MeasuringResistance and Current The W setting (*) is used to measure electrical resistance in ohms. * * • The A setting (*) is used to measure DC current in amps.
- 9. Measuring Resistance Setthe dial to a value greater than the resistor value being measured. For a 300 ohm resistor, set the dial to 2000 For a 5000 ohm resistor, set the dial to 20k The 1 in the display means the resistance is higher than the current dial setting
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