Constant SSR output from JLD-612
Posted: Wed Apr 15, 2015 3:42 am
Hi,
I bought the JLD-612 controller for use in a sous vide setup. I've just recently wired it up, and don't understand the behavior.
Terminals 1 and 2 are connected to 240VAC. Terminals 8,9,10 are connected to a PT100 thermocouple. Terminals 6 and 7 are connected to a small LED and a multimeter.
The device powers on fine, and seems to read accurate temperature from the thermocouple. When the SV is greater than the PV, the "out" light on the controller illuminates on and off, so does the LED on terminals 6 and 7, and I see voltage on my multimeter. When SV is less than PV, both LEDs stop illuminating, but I still read voltage across terminals 6 & 7 (variable, 3-7V). This seems incorrect -- I'd expect there to be little to no voltage on the SSR terminals when the connected load should be off. The SSR that I intend to use has an activation voltage of 3V, so it would be switched on even though the controller indicates off. Am I missing something? Is my controller possibly damaged? I've confirmed that the settings are all factory defaults (other than Inty = P10.0). Outy is definitely 2, and rd = 0.
Also, could someone tell me what the SSR output specification is? The website says "Dual output SSR(8V, 40mA), Relay(3A 120V AC)", so I'm not sure if the SSR output is AC or DC. I have the wrong type of SSR (DC-DC), so I don't want to plug it in to test.
Thanks for your help!
Ross
I bought the JLD-612 controller for use in a sous vide setup. I've just recently wired it up, and don't understand the behavior.
Terminals 1 and 2 are connected to 240VAC. Terminals 8,9,10 are connected to a PT100 thermocouple. Terminals 6 and 7 are connected to a small LED and a multimeter.
The device powers on fine, and seems to read accurate temperature from the thermocouple. When the SV is greater than the PV, the "out" light on the controller illuminates on and off, so does the LED on terminals 6 and 7, and I see voltage on my multimeter. When SV is less than PV, both LEDs stop illuminating, but I still read voltage across terminals 6 & 7 (variable, 3-7V). This seems incorrect -- I'd expect there to be little to no voltage on the SSR terminals when the connected load should be off. The SSR that I intend to use has an activation voltage of 3V, so it would be switched on even though the controller indicates off. Am I missing something? Is my controller possibly damaged? I've confirmed that the settings are all factory defaults (other than Inty = P10.0). Outy is definitely 2, and rd = 0.
Also, could someone tell me what the SSR output specification is? The website says "Dual output SSR(8V, 40mA), Relay(3A 120V AC)", so I'm not sure if the SSR output is AC or DC. I have the wrong type of SSR (DC-DC), so I don't want to plug it in to test.
Thanks for your help!
Ross