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  3. 157777-13272

Measuring line noise and power conditioners

I recently purchased a Trifield EMI (Dirty Electricity) Line Meter to measure noise coming from my outlets. To my surprise, my $500 power conditioner (name withheld to protect the potentially innocent) appears to not filter any noise per the Trifield readings. In fact, with some of my outlets the measures are higher through the conditioner’s outlets, than the measures coming straight out of the wall. The manufacturer denies anything is wrong with their conditioner, claiming the Trifield is measuring the wrong frequencies. Can anyone explain?

output555
slaw's avatar
slaw
21,644 posts
 
@erik_squires ,

In your recent responses, you say RFI. We are referring to EMI.

What I hear ain't luck. Having a device that can measure what I hear ain't luck.
erik_squires
16,133 posts
 
In your recent responses, you say RFI. We are referring to EMI.


My bad.


What I hear ain't luck. Having a device that can measure what I hear ain't luck.

Coincidence and bias are real, which doesn't mean you haven't done enough experimentation to eliminate them, they are just the first to things to eliminate before claiming more.

slaw's avatar
slaw
21,644 posts
 
@tvad ,

That's really high my friend. Mine on either dedicated line is now measuring around 220.
When you achieve a lower level, you will be surprised at the increase in SQ.
slaw's avatar
slaw
21,644 posts
 
@erik_squires ,

Now you seem to be backing off your original post.

I never said I'm done. Just reporting my experience.
three_easy_payments's avatar
three_easy_payments
2,097 posts
 
I guess I never thought that hash on the AC line was associated with any frequency....I assumed it was an equal opportunity offender of all frequencies regardless of where you were measuring the dB reduction.
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