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Ev Archive for April 2000
1598 messages, last added Wed Aug 08 18:48:15 2001

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Re: gaining energy overnight



Michael Haseltine wrote:
> I checked the emeter and it said -.26 (kwh), whereas when I got home
> the evening before, it showed -.32. What's going on here?

Well, you "gained" 0.32-0.26=0.06 kwh in about 12 hours. That's a rate
of 60wh / 12h = 5 watts. Assuming a 120v pack, I = 5w / 120v = 0.042a.

1. The E-meter itself have an offset error of 42mA. (I.e. the E-meter
thinks that 0v on the shunt is 42ma).

2. The E-meter's shunt wires are faulty or hooked up wrong (picking up
noise, thermal emf, voltage drops, etc.

3. You have some load connected to the E-meter shunt wrong.

4. You have a ground fault that's causing a leakage current through the
shunt. 
-- 
Lee A. Hart                     Ring the bells that you can ring
4209 France Ave. N.             Forget the perfect offering
Robbinsdale, MN 55422 USA       There is a crack in everything
phone (612) 533-3226            That's how the light gets in
leeahart@earthlink.net                  Leonard Cohen