A rectifier is a device that only allows electrical current to flow in one direction. A silicon-controlled rectifier, also known as an SCR, is a rectifier in which the forward resistance can be controlled. Normally an SCR will not allow current to flow in either direction, but if you suppl...
Testing voltage follows a simple process. For those of you new to electrical testing, we asked our resident Pro how they might teach an apprentice how to use a multimeter or voltmeter. Once you know how to use a multimeter, you can move on totroubleshooting and fixing electrical problems, v...
and you can do this with a multimeter in one of two ways. You can measure voltage across the switch terminals, or you can test for continuity, which calls for measuring resistance between them. Because the furnace has to be on for a voltage test,a continuity testis safer and...
Introduction of how to use a digital multimeter. Selecting measurement parameter, switching ranges, and connecting test leads.
Every electrical device or load has resistance. Resistance is like a restriction to the flow of electrons and electricity is dissipated as heat energy in a resistance. For a fixed voltage applied to a load, the higher the resistance, the lower the current. Going back to the water analogy, ...
Every home should have a multimeter because it can help diagnose problems with all kinds of electrical fixtures, not just lightbulbs. A typical multimeter has a large number of dial settings, and if you're doing a light bulb socket voltage test, you set the meter to a voltage range suitable...
Caution is necessary as inputting a voltage while the test lead is inserted into the “A” terminal could damage the digital multimeter. Consequently, it’s good practice to turn off power to the circuit under measurement so that a voltage is not applied inadvertently. Then connect the current...
Multimeter or continuity tester Screwdrivers Wire stripper Wire connectors What Are the Steps to Electrical Cord Repair? Test an attached 120-volt electrical cord: Unplug the appliance or device. Disassemble the device to access the cord terminals. Un-clip, unscrew, or de-solder the cord’s conne...
If you are not comfortable doing the jumper test, you cantake your PSU to one of our qualified techniciansto have it tested. Find Top-Tier Deals on Desktop Computers Testing with a Multimeter A multimeter is a handheld tool used to measure electrical forces like volts and amps. Electricians ...
How to check AC Voltage with a multimeter Connect the red Test Lead to “VOhmsmA Jack” and the black lead to AC Current Circuit Symbol “COM” jack. Set the “Range Switch” to desired AC V position. Connect Test Leads to device, electronic component or circuit being measu...