0
Why does your 120 outlet measure 49 volts when you test it with a multimeter?
Wiki User
∙ 9y ago
Either the supply or the multimeter is faulty.
Wiki User
∙ 9y ago
Add your answer:
Earn +20 pts
How do you test speaker impedance?
You can measure speaker impedance with a multimeter set to the ohmmeter setting. Just place the multimeter probes across the two terminals of the speaker and you'll get the impedance value.
Which mode is use in digital multimeter for testing of diode?
A: For a digital meter to test a diode it must have a scale for resistance for it to work, If not a 1.25 v cell with series limiting resistor will work. If you measure across the diode the reading should be .7 volts reverse the cell polarity then the diode voltage should be 1.25 v .7v is forward voltage 1.25 is reverse voltage.
Why must a multimeter only be use to test the resistance of a deionized circuit or component?
It isn't true, a multimeter can be used for all kinds of other measurements as well.
How do you test to see if you have a dedicated electrical outlet?
Put the meter on AC Volts, 200V range. For residential US service you should have 120V between hot and neutral, 120V between hot and ground, and 0V between neutral and ground. Remember: narrow prong is hot, wide prong is neutral, round prong is ground. Don't set your meter to current or you will zap it. Reisitance shouldn't damage it, but the reading will be worthless. (If you don't know what you are testing for or how to use your tool, should you really be sticking things in a wall outlet?)
What happens when you push the test button on a outlet?
It safely grounds or faults the GFCI outlet. You're supposed to check/test them once a month, they do wear-out and need replacing.
What are the function of multimeter?
They allow the user to test: Volts (AC and DC), Amps, Ohms and basic continuity.
What are three test that the digital multimeter is used for?
To measure voltage, current and resistance.
How do you test that inverter battery is exhausted or need to be replaced?
Use a multimeter to measure the voltage.
How do you do different test on automotive cars using a multimeter?
Ohms=resistance in the wiring. Volts=your power. Amps=how much power u got;)
When measuring voltage how should test probes be connected?
First connect the positive terminal of the voltage line to positive terminal of multimeter and negative to negative terminal of multimeter. Select voltage in multimeter and measure the voltage
Is it possible to test a diode with multimeter?
Yes it is possible to test a diode with a multimeter.
How can you test a battery?
You can test a battery by using multimeter. Set the multimeter to the DC voltmeter setting and then place the leads of the multimeter across the leads of the battery. the multimeter will have a readout of the voltage.
What is the advantage provided by multimeter?
A multimeter, also called a VOM, is an ohmmeter, ammeter, and voltmeter combined in one case. A function knob can be turned to select the type of measurement to be made, such as volts, amps, or ohms. The multimeter's test lead connections to the circuit will depend on whether you are using it as a voltmeter, an ammeter, or an ohmmeter.
What are the basic test instruments in electricity?
A "multimeter" to test resistances, voltages, amperages. An external "clamp" meter to measure high ac currents. A "mega" meter to test insulation.
How do you test the alternator in a 99 Chevy Malibu?
You will need a digital multimeter that can measure DC voltage for an accurate reading. Open the hood and connect the positive and negative multimeter leads to the positive and negative battery posts. Turn on the multimeter and make note of the battery voltage you have before starting the engine. The battery needs to be fully charged to get an accurate alternator reading. A fully charged battery should read 12.68 volts. Assuming the battery is healthy and fully charged, start the engine and let it idle. Make note of the multimeter reading. A healthy alternator should read 14.2 Volts. Now with engine still running, turn on the headlights and turn on the heater blower on high. Multimeter reading should stay above 13.8 volts. If you are below these numbers you may have a tired alternator.
How can you test an alternator efficiency?
A simple test is to start the engine and let it run at idle. Connect a digital multimeter set to 20 volts DC to the battery. Red to + and black to -. If the alternator is good you will read from 13.5 to 15.5 volts. This tells you allot but is not a definitive test. To test it completely drive to your local auto parts store and have then test it under load. Most will do this for free.
How many volts should be coming out of the alternator on a 1995 Lincoln Mark VIII?
With everything (all electrical items) turned off, your alt. should be producing 13.2 to 14.6 volts. You can test this with a multimeter by putting the red tester on the big terminal on the back of the alt. and the black tester on the negative battery post. make sure the multimeter is set to DC current.
