sub3marathonman
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How to bench test an electric meter?

Tue Feb 24, 2015 8:40 am

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.

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drees
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Re: How to bench test an electric meter?

Wed Feb 25, 2015 1:52 am

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.
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sub3marathonman
Posts: 302
Joined: Wed Nov 03, 2010 11:57 am
Delivery Date: 31 Mar 2012
Location: Bartow, FL

Re: How to bench test an electric meter?

Wed Feb 25, 2015 7:55 am

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.

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Randy
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Re: How to bench test an electric meter?

Wed Feb 25, 2015 1:51 pm

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

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drees
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Re: How to bench test an electric meter?

Wed Feb 25, 2015 2:02 pm

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
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ElectricEddy
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Re: How to bench test an electric meter?

Wed Feb 25, 2015 6:04 pm

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.
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