Chapter 37

Digital Volt-Ohmmeter
DVOM Components
Min/Max and Hold Setting
Setting Up a DVOM
Test Leads: Common and Probing
Probing Techniques
Measuring Volts, Ohms, and Amps
Voltage Exercises
Voltage Ranges
Voltage Drop
Voltage Drop Across Multiple Loads
Voltage Drop Across Unequal Loads
Current Exercises
Measuring Current
Current and Magnetic Fields
Resistance Exercises
Measuring Resistance
Resistance Effects on Current—Exercise 1
Resistance Effects on Current—Exercise 2
Resistance Effects on Current—Exercise 3
Resistance Effects on Current—Exercise 4
Series Circuit Exercises
Series Circuit—Exercise 1
Series Circuit—Exercise 2
Series Circuit—Exercise 3
Series Circuit—Exercise 4
Series Circuit—Exercise 5
Series Circuit—Exercise 6
Parallel Circuit Exercises
Parallel Circuits—Exercise 1
Parallel Circuits—Exercise 2
Parallel Circuits—Exercise 3
Parallel Circuits—Exercise 4
Parallel Circuits—Exercise 5
Series-Parallel Circuit Exercise
Variable Resistors
Variable Resistors Exercise
Capacitors—Exercise 1
Waveforms and Scope Testing
Checking Circuit Waveforms
Electrical Circuit Testing
Using Ohm’s Law to Diagnose Circuits
Using Wiring Diagrams to Diagnose Electrical Circuits
Using a DVOM to Measure Voltage
Checking Circuits with a Test Light
Checking Circuits with Fused Jumper Leads
Locating Opens, Shorts, Grounds, and High Resistance
Inspecting and Testing Circuit Protection Devices
Inspecting and Testing Switches, Connectors, Relays, Solenoid Solid-State Devices, and Wires