It's a must-have for any toolbox—but there's a learning curve involved. Learn how to use a multimeter for all of your electrical testing needs.

A multimeter is a tool that measures electrical properties like resistance, voltage, and current. It is used to test ...

Switch the multimeter to measure resistance at its lowest setting, and test across the fuse. A reading of OL, or significantly higher than 20 ohms, suggests the fuse is blown.

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 ...

Using a multimeter is an obvious answer. However, ... Likewise, if we subtract 20,000 from 200,000, the resistor could have a resistance of as low as 180,000 ohms. Testing resistors ...

Write down the ‘normally closed’ resistance reading obtained and compare it to the resistance specified in the PIR instruction sheet (e.g. 10.0 Ohms). Providing the reading is to within plus or minus ...

This multimeter add-on is called the Half Ohm.It allows you to measure small resistance values, and can be used to track down shorts on a PCB. The board acts as a pass-through for both probes.

With the multimeter set up across the bulb, you have put the meter in parallel with the bulb. Since the ammeter setting has low resistance you get a BUNCH of electric current going through the meter.

Occasionally, we find fun new electronic instruments in the wild and can’t resist sharing them with our readers. The item in question is the FNIRSI HRM-10 Internal resistance meter, which we … ...