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Volt and amp meters installation

 
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jtomasrl




Joined: 24 Dec 2015
Posts: 1



PostLink    Posted: Thu Dec 24, 2015 11:39 pm    Post subject: Volt and amp meters installation Reply with quote


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I have a question when installing the volt/amps meters. Why using 2 adjustable DC power supply and 120VAC to 12VAC transformers when you can use one set and connect both elements
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chastuck




Joined: 06 Oct 2013
Posts: 193
Location: Beckenham, Kent, UK

Drinking: Bitter

Working on: IPA


PostLink    Posted: Fri Dec 25, 2015 10:22 am    Post subject: Re: Volt and amp meters installation Reply with quote

jtomasrl wrote:
I have a question when installing the volt/amps meters. Why using 2 adjustable DC power supply and 120VAC to 12VAC transformers when you can use one set and connect both elements

This question crops up time and time again on this forum and it's always the same answer. With the specified amp and voltmeter there is an interaction between the two if only one transformer is used, which leads to false readings. The two meters must have an isolated power supply for each.
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kal
Forum Administrator



Joined: 12 Dec 2010
Posts: 11116
Location: Ottawa, Canada

Drinking: Pub Ale, Electric Creamsicle, Mild, Pliny the Younger, Belgian Dark Strong, Weizen, Russian Imperial Stout, Black Butte Porter


PostLink    Posted: Sat Dec 26, 2015 3:17 pm    Post subject: Reply with quote

Correct! See the "How it works" section of the wiring instructions here for a full explanation:

http://www.theelectricbrewery.com/control-panel-part-2?page=9

Kal

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