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LMartin
Joined: 25 Dec 2012 Posts: 22 Location: Brookfield, WI
Drinking: Brown Shugga, Bridgeburner, Accidental Amber, Electric IPA
Working on: Red IPA
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Link Posted: Tue Jul 31, 2018 1:34 am Post subject: |
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I incorrectly wired the temperature probes, but have corrected the problem. Thanks again for the help Kal.
Lynn
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akbull24
Joined: 30 Jul 2018 Posts: 4 Location: Alaska
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Link Posted: Tue Jul 31, 2018 1:50 am Post subject: SSR's closed all the time... |
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Just finished wiring up my 80amp SSR's and did some testing. From what I can tell, they are closed at all times that they have 120V circuit running to one on the output terminals. A continuity test tells me that when there is no power to one of the output terminals the SSR is opening and closing as commanded by the PID. As far as I can tell, when 120v is applied to one of the output terminals it is causing the SSR's to close, irregardless of the PID command (same scenario if LED light on SSR is on or off). I am confident that it is something I have done in my wiring or something to cause this, as I had ordered a spare SSR (three total) and all are doing the same thing. I also tested PID output and it is right on (12VDC), and the light turns on and off as it should. Any ideas as to what I am doing wrong or other tests I can run to try to figure out what is going on? Thanks!
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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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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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Link Posted: Tue Jul 31, 2018 1:58 am Post subject: Re: SSR's closed all the time... |
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akbull24 wrote: | Just finished wiring up my 80amp SSR's and did some testing. From what I can tell, they are closed at all times that they have 120V circuit running to one on the output terminals. A continuity test tells me that when there is no power to one of the output terminals the SSR is opening and closing as commanded by the PID. As far as I can tell, when 120v is applied to one of the output terminals it is causing the SSR's to close, irregardless of the PID command (same scenario if LED light on SSR is on or off). I am confident that it is something I have done in my wiring or something to cause this, as I had ordered a spare SSR (three total) and all are doing the same thing. I also tested PID output and it is right on (12VDC), and the light turns on and off as it should. Any ideas as to what I am doing wrong or other tests I can run to try to figure out what is going on? Thanks! |
Hi! You can't do continuity tests or measure voltage on SSRs as they have voltage/current characteristics of semiconductors rather than mechanical relays. Because of this it's normal to always see voltage on the output due to their design. See the FAQ in the first post of this thread for complete details, specifically the section "I'm measuring voltage at the output of the SSR even though the SSR is supposed to be off! Is it broken?".
If you're having problems with the elements firing, see the section "My heating element is not firing at all! (or firing continuously)". It'll walk you through step by step.
Welcome to the forum!
Kal
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akbull24
Joined: 30 Jul 2018 Posts: 4 Location: Alaska
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Link Posted: Tue Jul 31, 2018 3:13 am Post subject: |
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Thanks Kal!
I was under the impression the voltage you might see would amount to the 'leak through' voltage amount, not full phase like I was seeing, after your reply and some additional research I am thinking all is normal! Thanks so much!
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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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