Course Objective
Whether it's troubleshooting an electrical problem or testing a circuit for safety purposes, digital multimeter (DMM) has become the tool of choice for most maintenance workers. This course provides students with the knowledge to safely use a DMM to measure voltage, resistance and electrical current in most electrical circuits below 600 volts.

Benefits
Students will learn the basics of AC and DC circuits
Electrical safety precautions and troubleshooting skills will now be part of a workers capabilities
Know what value you should read its measured

Activities
Bread board exercises
Tests within a motor starter

Outline

---

The Electric Circuit
Ohms Law - Voltage, Resistance, Current
Series and Parallel Circuits
The Anatomy of a Short Circuit
Voltage Drop in Series Circuit
Effects of Open Circuits on Voltage Measurements
Measurements to Ground or Neutral
Voltage Across Energized and De-energized Coils

Basic DMM Components
Selecting the Proper Voltage Range and Automatic Ranging
Maximum Voltage Limit of DMM
AC vs. DC Voltage Function
The Millivolt Function
Resistance Measurements - Ohms, Kilohms, Megohms
Current Measurements - Amps, Milliamps, and Micro-amps
Measuring DC and AC Voltage
Alternating or Direct? Determining Which Current Type that Exists in a Circuit
Background and Leakage DC
RMS vs. Average vs. Peak Values of and AC Wave Form

Measuring Resistance
Understanding Resistor Color Codes
Kilohm (K) and Megohm (M) Resistance Measurements
Using a DMM for Simple Continuity Checks