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Why diac should be tested with power supply and cannot be tested with digital multimeter?
Wiki User
∙ 10y ago
It's like a spark plug, it needs higher voltage to transmit the power.
Wiki User
∙ 10y ago
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What can be tested with a digital multimeter?
No. You must use a ground (earth) resistance tester, such as a earth-resistance megger. Apart from the practical requirements for making the test (too long to explain in this answer), a digital multimeter uses a DC supply, which acts to polarise the chemicals in the soil, giving false readings. ANSWER: YES you can but only if there is appreciable Resistance to measure. THERE ARE MANY GROUNDS EARTH IS ONE OF THEM
When switch is off of power supply output shown on the multimeter is negative voltage from power supply?
Yes.
What would happen if ammeter were connected directly across a voltage source?
An ammeter measures current by either being inserted in series with the load being measured or using a clamp-on device that induces a proportional current that the meter measures. Nothing should happen if you connect an ammeter across a voltage source unless it was very high voltage compared to the rating of the meter.
What digital multimeter scale should be used when testing the signal from a Hall-effect switch?
You should use the scale that shows correctly your supply voltage. Most Hall-effect switches provide either a logical output or an open-collector output. If the output is logical, you can expect the value to be between 0 and your supply voltage. If the output is open-collector, you must bias the output to your supply voltage with a resistor; otherwise you will always read "0". If biased, the output will be between 0 and the voltage bias. If you are not certain of which type you have, try finding the datasheet on the Internet; otherwise, you can always bias the output to your supply voltage; if you properly choose the resistor, it should not adversely affect the behaviour of the logical-level output. I would suggest trying 1 kOhm with a 5 V supply; this gives a bias current of 5 mA, which most Hall-effect sensors should be able to cope with. There are other Hall-effect sensors that provide linear output, but this answer is about a Hall-effect switch.
Methods of calculating Ripple voltage in supply without using oscilloscope?
Measure AC voltage with multimeter. It is easiest way to check how big ripple is. There is no way to 'calculate' value.
Why does your 120 outlet measure 49 volts when you test it with a multimeter?
Either the supply or the multimeter is faulty.
What can be tested with a digital multimeter?
No. You must use a ground (earth) resistance tester, such as a earth-resistance megger. Apart from the practical requirements for making the test (too long to explain in this answer), a digital multimeter uses a DC supply, which acts to polarise the chemicals in the soil, giving false readings. ANSWER: YES you can but only if there is appreciable Resistance to measure. THERE ARE MANY GROUNDS EARTH IS ONE OF THEM
How can you tell if your laptop AC power supply is working properly?
Purchase a cheap multimeter: http://www.robotshop.us/elenco-m-1000c-digital-multimeter.html Turn the dial to 200 ACV and mesure the output.
When switch is off of power supply output shown on the multimeter is negative voltage from power supply?
Yes.
What is the most efficient way to determine if your power supply is bad?
test it with a multimeter
What kinds of electronics use a DC power supply?
Almost all digital electronics use a AC to DC power supply. Digital electronics cannot handle AC. all electronics device having battery powered are using DC power supply http://www.wzmicro.com
What should follow through on a tattoo digital power supply?
The person who apprentices you should tell you that. It is not something you should be learning about on the internet
Where can I go to get a TV converter box?
You can get this from your digital broadband, such as Sky or virgin media, because since they are your digital supply then should give you something to do with the T.V.
What tool can you use to troubleshoot power supply issues measure current resistance or voltage?
multimeter
How is it possible your power supply is faulty multimeter test says acceptable?
A multimeter draws next to no current, so will not effectively test the power supply under load. The voltage on the meter is averaged out and so will not show ripple current, or spurious dips in the supply. You will need an oscilloscope to check for ripple current (poor smoothing) and the supply needs to be under a load.
Which multimeter setting to test power supply of a computer?
That depends on what you're testing it for. You would mostly use the volt meter settings to test for proper voltage output at the connectors coming out of the power supply. After verifying the expected volt output from a suspect connector, You should, in case you are wrong or a short is present, start with the highest voltage AC settings first and then reduce to lower settings and DC to confirm proper outputs.
What is used as a diagnostic tool to test the functionality of a defective device such as a power supply but can also be used to test coaxial serial and parallel cables as well as fuses and resistors?
You likely mean a multimeter. A multimeter tests voltage (voltmeter), current (ammeter) and resistance (ohmmeter). You would need a high impedance one to help prevent blowing sensitive circuits, and digital ones tend to be high impedance.
