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Builder
Joined: 03 Sep 2017 Posts: 32 Location: Indiana
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Link Posted: Sat Dec 04, 2021 1:40 pm Post subject: replace shunt or not? |
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A few years ago hen I first assembled my panel, I neglected to check the voltage output of my 5v power supplies. This resulted in a loss of both volt and amp meters. I also found that the 5v supplies had shorted out on the backplane sepite the rubber spacers. I have since repaired the 5v supplies and added spacers to keep them from shorting again. I also just received new meters. (Thanks Kal I can't wait to get them in)
Ok, so on to the point...
Somewhere around here there is a blurb that says the shunt and amp meter are a matched set. Since I am replacing the amp meter with an identical replacement, can I use the shunt that's already installed, or do I have to replace it with the one that comes with the new meter? I'll replace it if it's reccomended, but if if doesn't matter I'll throw it in the parts drawer.
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kal Forum Administrator
Joined: 12 Dec 2010 Posts: 11121 Location: Ottawa, Canada
Drinking: Pub Ale, Electric Creamsicle, Mild, Pliny the Younger, Belgian Dark Strong, Weizen, Russian Imperial Stout, Black Butte Porter
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Builder
Joined: 03 Sep 2017 Posts: 32 Location: Indiana
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Link Posted: Wed Dec 08, 2021 5:05 pm Post subject: |
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Swapped out the shunt just because. Wired 120 to the bus bar, meters unhooked. Both power supplies lit up and read 4.5v. I plugged in the meters and tred again, so far so good. I then hung the panel back on the wall, plugged int he240, and something happened. One of my power supplies died again, Burned to coating off one of the traces and melted the wire I used to repair and burnt trace. I wonder if it has something to do with the dc ground being tied to one of the AC inputs? (It was the powersupply for the volt meter)
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kal Forum Administrator
Joined: 12 Dec 2010 Posts: 11121 Location: Ottawa, Canada
Drinking: Pub Ale, Electric Creamsicle, Mild, Pliny the Younger, Belgian Dark Strong, Weizen, Russian Imperial Stout, Black Butte Porter
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