Testing voltage with a multimeter

Set the multimeter to “2V” in the DC (direct current) range. Almost all portable electronics use direct current), not alternating current. Multimeters are generally not autoranging.

Note: Most multimeters power up in Autorange mode. First insert the black lead into the COM jack.

Next insert the red lead into the VΩ jack.

When finishe remove the leads in reverse order: red first, then black.

Connect the test leads to the . Just recognize if the probes touch opposite terminals, a negative symbol will appear in the display. Professional supervision advised. Warning: If unfamiliar with electrical safety proced.

You can also use it for checking continuity of wires and fuses. If you like to DIY, do car maintenance or troubleshoot electronic or electrical equipment, . Well, we have something for you. HomeChannel Checking the voltag. This knowledge is necessary for anyone that is installing their own car audio systems or working with electronics.

Free by coupon or very low cost by wallet! For this reason, the highest range possible is selected so that the meter circuitry and movement will not be damaged by voltage greater than expected. If your multimeter is not auto-ranging, knowing which scale to pick can be tricky, especially if you are not very familiar with metric prefixes. Here are two rules of thumb you can follow for measuring voltage , current, and resistance: Voltage : . A diode is best tested by measuring the voltage drop across the diode when it is forward-biased. Steps for measuring continuity.

A good fuse, for example, should have continuity. A DMM emits an audible response (a beep). If voltage in the circuit is unknown, set the range to highest voltage setting. Note the maximum voltage for each setting, household current is approximately 1volts, set the dial accordingly. When measuring resistance, all musltimeters use exactly the same principle whether they are analogue multimeters or digital multimeters.

In fact other forms of test equipment that measure resistance also use the same basic principle. A multimeter is an electronics testing device that, um, tests multiple things, including resistance, voltage , and current. Using certain multimeter models, you can test to be sure that components — such as diodes, capacitors, and transistors — function properly. Ever wonder if power is actually reaching an outlet?

Properly use your multimeter also can tell you whether the white and black wires are reverse whether the receptacle is properly grounde and which cable entering the box feeds power to the outlet.