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Language: English
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Training Time: 17 minutes
Compatibility: Desktop, Tablet, Phone
Based on: Industry Standards and Best Practices
Languages: English
A digital multimeter is a single instrument that is capable of measuring voltage, current, and resistance, so it is useful for troubleshooting electrical circuits and equipment. Voltage measurements can be made between any two arbitrary points in a circuit or relative to a single absolute ground point. Either method can be used to isolate component performance problems within a circuit. Current measurements with a multimeter require incorporating the meter into a circuit, so they are more difficult to make. Voltage and current measurements require that a circuit be energized. Resistance measurements require that the power be off and the tested component isolated from the rest of the circuit.
Electric Shock
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Electrical Safety General Awareness
OSHA Electrical General Requirements
Electromagnetic Induction
Hand Tools for Electrical Work
The following key questions are answered in this module:
What measurements can be made with a digital multimeter? A digital multimeter is a single instrument that is capable of measuring voltage, current, and resistance. Some models may additionally include the ability to perform capacitance measurement, diode or transistor testing, and temperature measurement.
What are the basic external features of a digital multimeter? A digital multimeter consists of three major external features, a display, a function selection knob, and test lead ports.
What is voltage? Voltage is a measure of the charge potential between any two points in an electrical circuit.
What is electrical continuity? A component such as a light bulb has continuity if there is a complete conductive path for electricity through the component.
If no current is flowing through an electrical component, what will be the voltage drop across that component? If there is no current flow through an electrical component, there will be no voltage drop across that component.
Below is a transcript of the video sample provided for this module:
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