Check that the circuit is de- energized by measuring the voltage (Cf. The red lead on the terminal usually marked “VΩmA” ģ.Choose a rating just above the resistance to be measured (kΩ = x1000 Ω, MΩ = x 1,000,000 Ω).To measure the resistance of an element, it is essential to disconnect at least one wire, otherwise the measurement will be inaccurate. The measurement of resistance or electrical continuity is always done with the power off, otherwise the multimeter could be damaged. This function is very useful in troubleshooting to test a fuse, a lamp, a switch or measure the value of the resistance of an oven in particular. For an electric cable, you must insert the clamp on a wire of the cable and not on the cable. If the device is equipped with a current clamp, it is sufficient to insert the wire in the clamp and to read the displayed value. If possible, choose a lower gauge to get a more accurate reading. Switch on again (switch on the circuit breaker if necessary).ġ0. Connect the tip of the other cord to the terminal disconnected previously.ĩ. Connect the tip of a test lead to the disconnected wire.Ĩ. Open a point in the circuit by disconnecting the wire from a terminal.ħ. Check that the circuit is de-energized by measuring the voltage (Cf. Switch off the circuit by tripping the general circuit breaker located next to the electricity meter for example.ĥ. The red lead on the terminal is usually marked “VΩmA” for currents below the maximum rating in mA or on the terminal marked “10 A” for currents with a higher value.Choose the maximum rating in case of doubt, usually 10 A. Choose the caliber just above the measured intensity.Please note, many devices do not have this function On A to measure a current in direct current or in rectified current.Some multimeters are equipped with an amp aerometric measuring clamp which greatly facilitates this operation.įor this measurement, proceed as follows:

To measure it, you must insert the multimeter “in series” in the electrical circuit. The intensity of an electric current represents the quantity of electrons which circulate in the electric wire. Measure the intensity of an electrical circuit If the device displays “I”, choose a higher rating. Red on the ” + “, black on the ” – ” in direct current.Place a point of the bead on each of the two points of the voltage to be measured. The black cord on the terminal usually marked “COM”.Ĥ.The red lead on the terminal usually marked “VΩmA”.Choose the rating just above the measured voltage.For example an electrical outlet, an electrical panel On V ~ to measure alternating current voltage.On V to measure a voltage in direct current or in rectified current.To perform this measurement, proceed as follows.

How to use gmt 312