Whats a good economical way to test the electricity on a circuit?

I don't think smart meters are bad, I think they collect a lot of information and STOP, meter readers in their tracks. I really think that is what it's all about. Smart meters cost a LOT of folks their jobs and as a results few EVER come by to check.. That leaves a simple visual inspection of your equipment, unattended.

500.00 meter. 100,000.00 (with H/W and retirement package) per year employee. LOL

Again, you already know it's dirty, and needs maintenance. 300.00 usd and you don't have to check or worry. It checks for you in Milliseconds and responds in milliseconds.. Mine tell me what they are doing, My server monitors the, backup system for the server its self, and any parameter I want to monitor. Hi/Low voltage peak, amps drawn, interruptions, time stamp, WiFi reboot or shutdown...

Most laptops can monitor all that stuff, if you want...Can't fix it though...

Regards

Don’t waste your time and money on measuring noise on your audio circuits. They are all noisy to a certain extent. If you want to make sure you have the least noise on your audio electrical circuits,  just hire a qualified electrician and install dedicated circuits and audiophile grade AC outlets (Furutech).
You should wire 2-3 dedicated 20 A circuits, depending on your system configuration. I have 3 dedicated circuits, one for each of my monobloc amps and another circuit for my source components. On the source circuit, I also added a Shunyata VRay II power conditionner.

For my own information, I purchased a used Entech AC line analyser meter. Measured the dedicated AC line noise on my dedicated and non-dedicated AC lines. The dedicated lines had 98% less noise than the non-dedicaged lines...

Hasn't heard Michael Fremer say ONE dedicated line, and then explain how audiophiles used to believe you needed more, "which is a really stupid idea" (his words not mine!).  

Like I said, its not that you can't measure the noise, its that its a waste of time. Because the noise is there. Guaranteed. And so being as we all are limited in our time and money it does no good - no good at all - to spend time and money only to confirm what we already know: there is indeed noise!  

People can prove this in like ten minutes. Already explained exactly how to do it. How many have bothered to try? Zero. Yet here we are reading all their uninformed opinions. 

What someone should do, maybe I will, cut and paste all the same old posts so next time someone asks the same question we can provide all the wrong answers in one fell swoop. 

Please someone go flip the breakers. There's only like a dozen people I have done this demo for, most of them absolutely convinced it was BS, half of them not even audiophiles, every single one shocked at how obvious a difference it was. One guy his wife, I said What's your favorite song and played it for her, then excuse me a minute went and flipped the breakers came back do you mind if we play it again? Instant it was done she is all excited says What did you do it sounded SO MUCH BETTER!!! 

Yet here we are whole slew of audiophiles supposedly willing to do anything to get better sound yet too lazy to try this one simple trick. But all with time to post misleading opinions. Sad.
https://ultimist.com/video/2018/07/21/michael-fremers-listening-room/
Skip to 15:50. Please.

Don't worry about measuring. Start somewhere. Start with clamping any led lamps in the room.
https://www.russandrews.com/us/rf-clamp-pack-of-2-small/