Turn on the audible function select switch (E). To test the circuit, place the test probes (A and B) across it. If the voltage surpasses 12 volts, the tester will automatically switch on. The voltage will be indicated by the LEDs.
How do you use a commercial electric multimeter to check voltage?
The most common use of a multimeter is to measure AC voltage. To assist isolate an electrical problem, check the plug on an appliance or outlet.
If your multimeter has an automated function, set it to the correct AC mode manually.
A digital multimeter will give you more precise results.
To inspect an electrical plug, follow these procedures. The premise is the same whether you’re testing an electric equipment or not:
- Turn off the plug’s power completely. This includes circuits and, if applicable, the plug itself.
- Set your multimeter’s mode to AC voltage. Begin at the top of the range and work your way down.
- Make sure your multimeter is set to a greater voltage than the cord’s printed voltage. This is normally 120 volts for modest two-prong items. Appliances with three prongs will have a greater voltage.
- Connect the black probe to the multimeter’s common jack.
- Connect the red probe to the AC voltage or ohms/omega jack. It’s also known as VmA, V, or V. (for voltage).
- Insert the black probe’s end into the neutral slot. It’s the wider prong of a polarized plug.
- Insert the red probe into the plug’s hot slot.
- Please double-check your work. A coffee grinder may be 300 volts, whereas a little hand mixer may be 120 volts.
- Remove the red probe, then the black probe, from the thing you’re testing after you’re through. In the same order, unplug everything.
If you need to test an AC main, use a multimeter with a Category II or higher rating. It is, nevertheless, advised that you contact a specialist.
How do you tell if a wire is live or not?
Buying a voltage tester is the safest way to see if a wire is live. There are numerous types to pick from. They will assist you in determining whether current is flowing through a wire. These low-cost devices can be purchased both online and at your local hardware shop.
How do you use a voltage tester to check voltage?
- Toggle the dial to. m is also included in some digital multimeters (DMMs). Set the range to the highest voltage setting and the dial to if the voltage in the circuit is unknown.
It’s worth noting that most multimeters start up in Autorange mode. Based on the voltage present, this automatically determines a measurement range.
- To begin, connect the black lead to the COM jack.
- The red lead should now be inserted into the V jack. Remove the leads in the following order: red first, then black.
- Connect the test leads to the circuit in this order: black first, then red.
Caution: Do not touch the lead tips with your fingers. Allowing the tips to communicate with one another is not a good idea.
- Check the display for the measurement. When you’re done, remove the red lead first, then the black lead.