To take a 2-wire resistance measurement with a benchtop multimeter, select the “ohm” or “Ω” mode, and connect the probes to the “INPUT HI” and “INPUT LO” ports. Ensure the circuit ...

You can just measure the input voltage and the output voltage and use one of the basic equations to calculate the value of the capacitance or inductance, but a ratio close to 2-to-1 is a good choice.

The first method places the multimeter in series with the circuit. This method, though not often used, can be of value when troubleshooting or calibrating low-amperage circuits. Such meter functions ...

This simple micro ampere meter circuit can help in measuring small currents in five ranges: from 1 µA to 10 mA. The meter is working in this way: the current being measured Ix shifts the input voltage ...

Watch for DMM loading in electronic circuits. DMMs have high input impedance when set to voltage, ... Imagine placing a couple of AA batteries across an energized 120V, 240V, or even a 480V circuit.

Some amplifiers will trip out because of the open circuit, some will not. The math is easy enough. That being said, most standard audio gear has rail voltages of around 50-75V.

For circuits that are not powered at the moment, you can remove the fuse from the fuse holder and test the fuse with your meter’s ohmmeter function. You should get a reading when you place your ...

For measuring resonance in circuits, a grid dip meter was also helpful. However, most modern users/operators aren’t accustomed to using that anymore. Report comment. Reply. greenbit says: ...

Most circuit breakers have similar internal structures, which makes the technique broadly applicable. There are two types in the US, according to the Lab: bimetallic thermal and solenoid magnetic. The ...