Basic meter use: When testing a fuse with a Volt-Ohm meter (digital multimeter), which measurement setting should you use?

Introduction / Context:A fuse is a passive component intended to be either continuous (very low resistance) or open (infinite resistance). Selecting the proper multimeter function ensures a quick and safe continuity check without powering the circuit under test.

Given Data / Assumptions:

• The fuse is removed from the circuit or the circuit is fully powered off.
• A standard digital multimeter with AC, DC, current, and resistance ranges is available.

Concept / Approach:Continuity is determined using the resistance (ohms) function. A good fuse measures near 0 ohms (or beeps in continuity mode). Using AC or DC voltage ranges does not reveal continuity in an unpowered fuse. Current (amps) mode is dangerous if placed across a component because it effectively shorts the meter leads through the meter shunt.

Step-by-Step Solution:

Verification / Alternative check:Use continuity tone if available; a steady tone indicates a good fuse. Visual inspection for a broken element can support the measurement but is not definitive.

Why Other Options Are Wrong:AC and DC ranges read voltages, not continuity. AMPS range risks meter damage and blown meter fuse.

Common Pitfalls:Testing in-circuit can produce misleading parallel paths; remove power and isolate the fuse when possible.

Final Answer:OHMS