Page 1 of 1

How to bench test an electric meter?

Posted: Tue Feb 24, 2015 8:40 am
by sub3marathonman
I got a couple of electric meters recently, and before I buy the box and setting everything up, I was wondering if there was some way to test them and make sure they work.

I tried to see if there was a video somewhere, but mostly they are testing installed electric company meters for accuracy. All I want to do is see if the meters I have will even register, prior to doing anything else with them.

Thanks.

Re: How to bench test an electric meter?

Posted: Wed Feb 25, 2015 1:52 am
by DaveEV
What kind of electric meter - a utility style kWh meter?

A 120V 12A space heater works well for this or other resistive loads (100W lightbulb, etc). You could even charge your car on L1. You can use a Kill-A-Watt to verify or a voltmeter + clamp-on ampmeter.

Re: How to bench test an electric meter?

Posted: Wed Feb 25, 2015 7:55 am
by sub3marathonman
drees wrote:What kind of electric meter - a utility style kWh meter?
Yes, a 240v utility kWh meter, round (in case they all aren't round) with the four big prongs sticking out the back. A Sensus iCon MXU Model 530-E to be exact.

So I have checked, but you have to modify the meter if you want to measure 120v usage. I was hoping to keep it and monitor 240v usage.

Thanks for the help.

Re: How to bench test an electric meter?

Posted: Wed Feb 25, 2015 1:51 pm
by Randy
In case that doesn't work out, pretty hard to go wrong with this "old school" meter for 15 bucks...No configuration needed...

http://www.hialeahmeter.com/spwm.html" onclick="window.open(this.href);return false;

Re: How to bench test an electric meter?

Posted: Wed Feb 25, 2015 2:02 pm
by DaveEV
Your meter will monitor 120V just fine. Drop the meter into a meter box and attach your 120V load to one hot and a neutral.

If you want to pull power across both leads plug in two identical loads on opposite hots and neutral.

Looks like you picked these up here, eh?

http://forum.solar-electric.com/forum/s ... our-meters" onclick="window.open(this.href);return false;

Re: How to bench test an electric meter?

Posted: Wed Feb 25, 2015 6:04 pm
by ElectricEddy
The above methods would work to determine accurate reads however if the meter is being used for collecting $ ie rental suite or similar, you may want to have it certified by an independent certification agency to avoid disputes in the future.