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# Electrical/Electronic Test Equipment

## Electrical Skills

This comprehensive interactive multimedia training program consists of three individual lessons that train participants how to properly use multimeters, megohmmeters, clamp-on ammeters, wheatstone bridges, and oscilloscopes.

Audience: This program is excellent for the training of electricians and electronic technicians as well as for the multi-craft training needs of process and manufacturing facilities.

Number of Courses: 3

### Course 1 – Multimeters

Prerequisites: This lesson is designed so that no prior knowledge is required.

Description: This lesson demonstrates and explains how to use both a digital and an analog multimeter. During this lesson, voltage, resistance, current, capacitance, and frequency are measured. This lesson also describes some of the more common features of a digital multimeter.

Objectives:

• Identify and describe the display area, the function switch, and the leads/jacks on a digital multimeter
• Adjust the mechanical zero and interpret a reading on the voltage scale, and the resistance scale of an analog multimeter
• Given an expected measurement, set the function and range switches of an analog multimeter and adjust the zero on the ohms scale
• Know how to use a multimeter for a variety of purposes including checking for continuity across a circuit, measuring resistance, current, frequency, ac and dc voltage, and capacitance
• And use the hold button, relative button, range button, and min/max button on a dmm

### Course 2 – Oscilloscopes

Prerequisites: This lesson is designed for participants familiar with AC and DC theory, electrical safety, and electrical print reading. A basic understanding of electronic devices and circuits is recommended.

Description: This lesson explains and demonstrates the use of both analog and digital oscilloscopes. Participants will learn the controls on each type of oscilloscope, how to use a probe with an oscilloscope, how to set up an oscilloscope, and how to determine various measurements taken with an oscilloscope.

Objectives:

• Describe what an oscilloscope is and how it works
• Explain the function of its display system, vertical system, horizontal system, trigger system and their controls
• Describe different probe types and their applications
• Set the trigger, vertical and horizontal controls to display a given waveform on an oscilloscope
• Identify sine, square, sawtooth, triangle, pulse, step, and complex waveforms
• Measure the voltage, period and frequency of a waveform
• Analyze its shape and perform waveform phase measurements

### Course 3 – Ammeters, Meggers, and Wheatstone Bridge

Prerequisites: This lesson is designed for participants familiar with AC and DC theory, electrical safety, and electrical print reading. A basic understanding of electronic devices and circuits is recommended.

Description: This lesson describes Wheatstone bridges, megohmmeters, and clamp-on ammeters. This lesson provides examples of the use of these instruments, identifies their components, and defines their functions. This lesson also describes safety and selection considerations for their use, describes how to set up the instruments, how to connect them to the systems under test, and how to take and read measurements. This lesson describes how to take a resistance reading of a Three-phase AC motor with a megohmmeter, how to set mechanical and electrical zero on a Wheatstone bridge, and how to interpret a Wheatstone bridge reading. This lesson also defines the “record” and “lock” features of a clamp-on ammeter and describes how to modify the range of the meter for the best results.

Objectives:

• Explain the use of a megger, identify its basic components and define its function
• Describe the safety and selection considerations for using it, and describe the procedures for setting it up
• Know how to attach the leads to the system and take a reading of a three-phase ac motor
• Define a bridge circuit and identify the components and function of a Wheatstone bridge
• Describe how to take a reading with a Wheatstone bridge and interpret it
• Identify the components, range, function, and safety and selection consideration for a clamp-on ammeter
• Describe the procedures for setting up a clamp-on ammeter, know how to take a reading and modify the range