How do you quickly test if a multimeter fuse is working?
For engineers who frequently work with electricity, "safety" is always the foremost factor to consider. And the multimeter is an essential testing tool for electricians, so the safety of using multimeters is particularly important for frontline engineers. As we all know, the multimeter has a built-in fuse in the current range, which is designed to ensure that when testing current, the multimeter is connected in series to the circuit. If the circuit current exceeds the limit or there is dangerous current, the fuse can break in time to ensure the safety of the instrument, especially the operator.
How to choose the right fuse?
To ensure the safety of both the instrument and the user, selecting a suitable and safe fuse becomes particularly crucial. Fluke multimeters are equipped with high-energy, ultra-fast-response original fuses, ensuring that in the event of an accident, the instrument can quickly shield against potential hazards. Fluke original fuses have always been designed to meet or even exceed the stringent requirements of international safety standards.
Advantages of Fluke fuses:
1. Rated voltage of 1000V, with a 11A fuse having a breaking capacity of 20KA. The original high-energy fuse not only melts under continuous rated current, but also instantly melts under very high instantaneous current, ensuring rapid response and safety
2. Ceramic tube packaging boasts strong arc-extinguishing capability and high reliability. The specially designed original high-energy fuse is filled with sand, which melts when energy and temperature sufficient to cause an explosion are generated, absorbing the energy and isolating the air required for explosive combustion
Hazards of using the wrong fuse:
Instruments were burned; pen meters melted; and there were casualties.
It's better to not install a fuse at all than to install an ordinary one!
How to quickly check if a fuse is good or bad?
Set the multimeter to the "Ω" range, using only one probe. Insert the probe tip into the "Ω" jack, and then insert the probe tips into the "A" and "mA/uA" jacks respectively. If there is a reading, it indicates that the fuse is good ("A" jack reading should be between 0-0.5Ω, and "mA/uA" jack reading should be around 10KΩ). If "OL" is displayed, it indicates that the fuse is blown.
