how to measure smps voltage

March 15, 2011 at 08:01:50
Specs: Windows 7
i jst want to knw how we can measure the smpa voltage

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#1
March 15, 2011 at 12:58:56
I'd use a VTVM.

"The era of big government is over," said Clinton 1996


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#2
March 15, 2011 at 15:44:13
jefro - when was your VTVM last calibrated? Use a voltmeter or multitester.

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#3
March 15, 2011 at 16:47:28
It has been a while.

"The era of big government is over," said Clinton 1996


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Related Solutions

#4
March 15, 2011 at 17:13:23
jefro - Just wondering - the tube must be pretty tired after so many years. Digital meters now are so much cheaper and are easier to read.

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#5
March 16, 2011 at 13:13:25
That is true.
Also the input impedance is much different so that it can skew results on digital stuff.

I guess I will have to buy one of those new fangled igfet/jfet front end deals.

Getting hard to get tubes also.

"The era of big government is over," said Clinton 1996


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#6
March 16, 2011 at 13:46:10
If the system is working, the computer's bios shows the current voltage readings for the system. If there's nothing wrong with the mboard, those voltage readings are fairly accurate.The readings for what is supposed to be +3.3v, +5v, and +12v are direct indicators of the voltages the power supply is putting out and should be within 10% of the nominal values.

Failing or dead computer power supplies are common. They're relatively cheap these days and there's no point to trying to figure out what's wrong with it if it actually doesn't work properly. Even if it is putting out all it's voltages within specs, there can be other things wrong with it.

The only sure way of determining whether your problem is caused by the power supply is to connect it to a known working system (that your power supply has enough capacity for), or try a different power supply (that has enough capacity for your system) from a known working system with your non working system


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