Dead ssr? - Home Brew Forums
Home Brew Forums > Home Brewing Beer > Electric Brewing > Dead ssr?

Reply
 
Thread Tools
Old 08-12-2011, 01:24 PM   #1
gitapaynts
Recipes 
 
Oct 2007
Atlanta, Georgia
Posts: 17
Liked 4 Times on 3 Posts



Looking for someone with a working ssr to measure resistance across the switch both when the control panel is off and when there is no input signal from the PID.

I think mine is fried from a direct fault since there is constant current flowing through it with or without PID signal (which appears to be triggering the signal correctly). Want to be sure it's dead before having to order a new one and heat sink and bust it out of my panel...

Cheers



 
Reply With Quote
Old 08-12-2011, 02:09 PM   #2
samc
Recipes 
 
Aug 2008
Portland OR
Posts: 5,387
Liked 62 Times on 58 Posts


try this http://tinyurl.com/4zd9952



 
Reply With Quote
Old 08-12-2011, 03:53 PM   #3
jkarp
Recipes 
 
Jun 2008
Elizabeth, CO
Posts: 2,108
Liked 44 Times on 34 Posts


Unlikely it's dead. All SSRs leak a few mA when "off". More than enough to get a reading on a DVM. Simply test your SSR with a load like an incandescent lamp.
__________________
Many Bothans died to bring you this information.

 
Reply With Quote
Old 08-12-2011, 04:32 PM   #4
gitapaynts
Recipes 
 
Oct 2007
Atlanta, Georgia
Posts: 17
Liked 4 Times on 3 Posts


Even leaky, should I be getting 240v by measuring the output from the ssr with one probe and the other leg out of the power in? I assume not if the ssr isn't being triggered closed....

I guess I'll try the light test, but it will require me to do some additionally wiring for it all. Seems to me the way it is installed is essentially the same and telling me the ssr is failing to open....

I'm still wondering if anyone has measured resistance across the switch terminals of an ssr when there is no inout trigger signal and if they see 0 resistance like I do.

 
Reply With Quote
Old 08-12-2011, 05:22 PM   #5
P-J
HBT_LIFETIMESUPPORTER.png
Recipes 
 
Mar 2010
Charlotte, NC
Posts: 3,337
Liked 301 Times on 235 Posts


Question... Is the element heating with the SSR input wires disconnected?

Just want to be sure.

 
Reply With Quote
Old 08-12-2011, 05:28 PM   #6
gitapaynts
Recipes 
 
Oct 2007
Atlanta, Georgia
Posts: 17
Liked 4 Times on 3 Posts


Good call. I'll double check when I skip out of work early this Friday afternoon... not like I'm getting mug done here with my brewery on the verge of completion.

 
Reply With Quote
Old 08-12-2011, 05:38 PM   #7
P-J
HBT_LIFETIMESUPPORTER.png
Recipes 
 
Mar 2010
Charlotte, NC
Posts: 3,337
Liked 301 Times on 235 Posts


I'm really interested. (Taps foot and waits) -

P-J

 
Reply With Quote
Old 08-12-2011, 05:39 PM   #8
jkarp
Recipes 
 
Jun 2008
Elizabeth, CO
Posts: 2,108
Liked 44 Times on 34 Posts


Quote:
Originally Posted by gitapaynts View Post
Even leaky, should I be getting 240v by measuring the output from the ssr with one probe and the other leg out of the power in? I assume not if the ssr isn't being triggered closed....
Yes you absolutely should be seeing 240v. SSRs switch current, not voltage.
__________________
Many Bothans died to bring you this information.

 
Reply With Quote
Old 08-12-2011, 05:41 PM   #9
lschiavo
HBT_LIFETIMESUPPORTER.png
 
lschiavo's Avatar
Recipes 
 
Sep 2009
Surrounded by Yoopers
Posts: 4,514
Liked 1016 Times on 689 Posts


Quote:
Originally Posted by gitapaynts View Post
Even leaky, should I be getting 240v by measuring the output from the ssr with one probe and the other leg out of the power in? I assume not if the ssr isn't being triggered closed....
This is exactly what mine did. I was a bit surprised by it too. It's not a mechanical switch though. You may see voltage but will not get current flow until its triggered.

 
Reply With Quote
Old 08-12-2011, 08:51 PM   #10
gitapaynts
Recipes 
 
Oct 2007
Atlanta, Georgia
Posts: 17
Liked 4 Times on 3 Posts


Just got home and per PJ unhooked the ssr and checked the element output. I get 1 volt across hots, 120 from 1 leg to neutral and 55 from the leg that was going through the ssr to neutral. The first two make sense to me, but I don't understand why I would get 55 from between the neutral and the disconnect other hot leg.



 
Reply With Quote
Reply
Thread Tools



Forum Jump