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Oscilloscope for power testing

post #1 of 9
Thread Starter 
There are a number of products out there offered to solve various power line contaminates, transformers, regenerators, filters, pixie dust, etc. I would like to take a look at my own power at the AV system, and plan to purchase a used Oscilloscope to take a peek.

Seeing as I have not used one of these since Physics for Poets (Yes, that was the name of the class - Lehigh, late 80's) I'm not sure which features I should be looking for to test for DC on the line, harmonics, and other garbage.

Thanks!
post #2 of 9
This will tell you very little. You really need a signal recorder to look at what you getting over a longer period of time. Something like a digital oscillograph.

My opinion, save your time and money. Everyone getting their hackles up over power conditioning reminds me of a pack of dogs barking at the moon. Your equipment is designed to run off line power. The 1st thing your equipment does is rectify and filter the AC line voltage to the DC voltages required for circuits. Power condtioning advocates will say, "but modern day power supplies are underdesigned". Hogwash. It reminds me of people who claim your colon is filled with junk accumulated over decades of you life. So you need their special enema program. Trust me your power line does not need an enema.

Jon
post #3 of 9
But for your own edification, if you should need to get a power recorder. Rent one from Electrorent or some other place. I recommend a Reliable Power meter or something similar.

I would recommend that you look at your electrical system and determine if you have whole house surge suppression at the main panel. If not, install some. Then look at installing a secondary unit at your AV rack to protect the equipment there from let through voltages after the main panel. I would spend money here first. If you don't currently have a problem with power, then I wouldn't spend the money to fix it.
post #4 of 9
Yes, I was going to say either rent the device or call up your power company. You can often get them to come out and measure the quality of your incoming power (if you have a "problem")...
post #5 of 9
About all most power companies will tell you is whether the voltages are within their tolerances.
post #6 of 9
post #7 of 9
Quote:

Hey that looks pretty slick, too bad they don't list the price online. But it certainly would work for this purpose.

Any idea how much it is? I might recomend one to our field tech's.
post #8 of 9
Quote:
Originally Posted by Colm View Post

About all most power companies will tell you is whether the voltages are within their tolerances.


This is true. They typically will not provide you information....especially if they are outside of tariff levels.
post #9 of 9
Quote:
Originally Posted by 11001011 View Post

Hey that looks pretty slick, too bad they don't list the price online. But it certainly would work for this purpose.

Any idea how much it is? I might recomend one to our field tech's.


Those units are interesting, but they have poor tolerance. I am referring to the RPM units which Fluke bought some time ago. Look under Reliable Power Meters.
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