How to check Bussmann Glass Fuse with a Multimeter

Types of Glass Fuses
Fast-blow fuses: Blow instantly when the rated current is exceeded.
Slow-blow (time-delay) fuses: Can tolerate brief current surges; often have a thicker or coiled filament inside.
Both types can be checked with a multimeter

Continuity mode: Ideal for testing fuses. Beep = continuity (good).
Resistance mode (Ω): Also works. Good fuse = very low resistance (usually under 1 ohm).
By the way I am using Extech multimeter

Extech makes a wide range of multimeters—some are solid choices depending on your needs and budget. They're generally considered good mid-range options, especially for DIYers, electricians, and light professional work.

Here are a few standout Extech models:

1. Extech EX570
Best for: Industrial or heavy-duty environments

True RMS: Yes
Water/dust resistant (IP67)
CAT IV-600V / CAT III-1000V safety rated
Temperature, capacitance, frequency, duty cycle, and more
Backlit display
Rugged build, ideal for field work
Price: Around $150–$200
Verdict: One of the best Extech models—rugged and full-featured.

2. Extech EX330
Best for: Home use, DIYers, light electronics

True RMS: No
Auto-ranging
Measures voltage, current, resistance, temp, and frequency
Includes a non-contact voltage detector
Small, lightweight
Price: Around $50
Verdict: Great budget multimeter with a lot of value.

3. Extech EX505
Best for: Electricians, general field work

True RMS: Yes
CAT IV-600V / CAT III-1000V
Temperature, frequency, duty cycle, capacitance
Rugged, drop-tested
Price: Around $100–$130
Verdict: A good balance between pro features and cost.

Bottom line: Extech multimeters are reliable mid-tier tools. If you're choosing between Fluke and Extech—Fluke wins on durability and precision, but Extech is solid for the price.