Sine wave monitor
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Jadnashua
Retired Defense Industry Engineer xxx
What aspect do you want to monitor? Voltage, wave shape, current, frequency?
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Jimbo
Plumber
The big question would be WHY? The frequency is controlled to a very tight tolerance by the power company. Are you doing anything geeky at home which would somehow affect the waveshape??
To answer your question, powerline voltage monitors are very common, with a recorder, and these days I would assume any model would have some kind of serial or USB interface.
Frequency and waveshape are monitored with an oscilloscope, and a data interface should be available on those as well. Simple programs are undoubtedly available to display the data.
As always, let your fingers do the walking>>> GOOGLE
To answer your question, powerline voltage monitors are very common, with a recorder, and these days I would assume any model would have some kind of serial or USB interface.
Frequency and waveshape are monitored with an oscilloscope, and a data interface should be available on those as well. Simple programs are undoubtedly available to display the data.
As always, let your fingers do the walking>>> GOOGLE
Billy_Bob
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The guy on the following page shows tests of sine waves from various devices. Shows that not all sine waves are equal!
He is using an oscilloscope. And for your PC to monitor this, you would need some sort of device to test with which would connect to your computer as well as the software.
Basically the computer has no "direct testing" connection to the power.
Observations on the quality of power produced by various backup devices...
http://www.jkovach.net/projects/powerquality/
Oscilloscope...
He is using an oscilloscope. And for your PC to monitor this, you would need some sort of device to test with which would connect to your computer as well as the software.
Basically the computer has no "direct testing" connection to the power.
Observations on the quality of power produced by various backup devices...
http://www.jkovach.net/projects/powerquality/
Oscilloscope...
Your tax dollars already paid for these kind of stats.
Prying them out of PoCo is another thing altogether.
I once saw a chart of NYC power. They had the envelope of 1/day, 1/week, 1/month transient magnitude and duration. Newspapers get this kind of info way easier than us peasants.
Power quality is worse in FL or the Ozarks.
http://books.google.com/books?id=SY...ahqMEB&sa=X&oi=book_result&ct=result&resnum=3
But, yeah, what question are you hoping to answer?
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hj
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sine wave
He may be trying to replicate one of the "power saving" devices that purport to condition the sine waves to "equalize" and "eliminate" the wasted power in your home.
He may be trying to replicate one of the "power saving" devices that purport to condition the sine waves to "equalize" and "eliminate" the wasted power in your home.
R_2016
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What I want to do is monitor the incoming power from the electric company. Sometimes at my house we get voltage sags and spikes, so I want to be able to monitor it with some kind of program that will create log files so I can keep an eye on things.
Bill Arden
Computer Programmer
I once wrote a program that uses the PC sound card and a AC wall wart and a resistor divider, however most sound cards have a bit of phase distortion at 60hz.
As for better equipment there are lots of USB based scope boards. Most of the scope boards accept low voltage voltages. You can drop the voltage using a AC output wall wart or by using a 24volt "control" transformer.
As for better equipment there are lots of USB based scope boards. Most of the scope boards accept low voltage voltages. You can drop the voltage using a AC output wall wart or by using a 24volt "control" transformer.
Billy_Bob
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Actually large computer facilities want "clean power" and do so with a large "online" "true sine wave" UPS system.
And these log all "power events" which would be anything with the power which is not as it should be.
I've seen these and they were recording events at least once an hour. Sometimes every half hour.
I don't know if smaller UPS units would have the detailed logging abilities of these larger units or not? But these might do what you want.
(And a UPS is an "Uninterruptible Power Supply")
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hj
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If all you want to do is register the voltage coming in, there are all kinds of recording meters which make a continuous log on a circular disc. The particular meter will determine whether the disc records a 24 hours or 7 days period. But I don't know how the knowledge will help you, because whatever your incoming power is, that is ALL that the power company can/will provide, and you will have to live with it.
If all you want to do is register the voltage coming in, there are all kinds of recording meters which make a continuous log on a circular disc. The particular meter will determine whether the disc records a 24 hours or 7 days period. But I don't know how the knowledge will help you, because whatever your incoming power is, that is ALL that the power company can/will provide, and you will have to live with it.
Bobelectric
Electrical Contractor
With that,I'm going to close this thread.
sawdust123
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Audio Precision has a device called the ATS1 or Portable 1 that will show you voltage frequency and the distortion levels of the incoming sine wave. Of course, it does a lot more too but you would only care if you were an audio guy. They sell for several thousand dollars.
