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pH probe shocking tank?

Posted: Mon Jun 23, 2014 7:42 am
by Gugs Jr
So it seems after I use the feed more timer on the RA, my pH probe shocks my tank.

After I disconnect for about 30 minutes or so I can plug it back in with no voltage going into the tank.

Any way to fix this?

Re: pH probe shocking tank?

Posted: Mon Jun 23, 2014 7:53 am
by rimai
Sounds like stray voltage.
Do you have LED drivers?

Re: pH probe shocking tank?

Posted: Mon Jun 23, 2014 8:48 am
by Gugs Jr
rimai wrote:Sounds like stray voltage.
Do you have LED drivers?
I do . I'm using: 4 Mean Well ELN-60-48P dimmable driver

Re: pH probe shocking tank?

Posted: Mon Jun 23, 2014 9:11 am
by rimai
What happens if you disconnect them?

Re: pH probe shocking tank?

Posted: Mon Jun 23, 2014 11:23 am
by Gugs Jr
rimai wrote:What happens if you disconnect them?
The lights go off? JK

you mean from the dimmable port or from the relays. I wouldn't be able to test this until I get off of work.

It does stop the voltage leak when I disconnect the pH probe. Its fine after I reconnect them after about 30 - 60 minutes.

Re: pH probe shocking tank?

Posted: Mon Jun 23, 2014 11:26 am
by rimai
Gugs Jr wrote: The lights go off? JK
:lol:

Yes, from the relay box.
My suspicion is that you are getting this stray voltage from your LED drivers.

Re: pH probe shocking tank?

Posted: Tue Jun 24, 2014 8:17 am
by Gugs Jr
rimai wrote:
Gugs Jr wrote: The lights go off? JK
:lol:

Yes, from the relay box.
My suspicion is that you are getting this stray voltage from your LED drivers.

Well I didn't have time to play around with different scenarios since I got stuck at work.

I did find out that if I use my android app to run the feed mode timer it didn't cause a stray volt.


I'm going to use the RA itself to use the feed mode timer to see if that makes it go off. My suspicion is that its when the LCD screen on the RA goes on that it cause it.

Re: pH probe shocking tank?

Posted: Wed Jun 25, 2014 4:44 am
by cosmith71
The pH probe will complete a circuit for stray voltage coming from another device.

You say you don't have it with feed mode? What pumps turn off with feed mode? Check those devices for voltage leaks.

--Colin

Re: pH probe shocking tank?

Posted: Thu Jun 26, 2014 3:19 pm
by Gugs Jr
cosmith71 wrote:The pH probe will complete a circuit for stray voltage coming from another device.

You say you don't have it with feed mode? What pumps turn off with feed mode? Check those devices for voltage leaks.

--Colin
Ok,

I just tested the LEDs and they weren't the cause of it.

The ones that turn off are my 4 Powerheads, Return pump and Skimmer. Guess now I'll start with those. So once I find out which has the stray volt do I just remove it for good or what would I do?

Re: pH probe shocking tank?

Posted: Thu Jun 26, 2014 6:06 pm
by cosmith71
Replace the faulty pump. It's dangerous.

--Colin

Re: pH probe shocking tank?

Posted: Fri Jun 27, 2014 6:34 am
by fatman
I have the same drivers you have and when I unplug them the voltage in the tank drops to zero. I'm going to try moving them and if that doesn't work I'll convert over to LDD drivers.

Re: pH probe shocking tank?

Posted: Mon Jun 30, 2014 12:41 pm
by Gugs Jr
So this weekend I tried unplugging every item one at a time and there was still a small shock. I'm going to try again with a multi-meter to try and pin point what could be causing it.

Re: pH probe shocking tank?

Posted: Mon Jun 30, 2014 7:43 pm
by meadowsad
I just created a similar thread earlier today, I thought I was the only one with this issue so I didn't even look through the forum.

I unplugged everything and noticed the same problem. I went as far as unplugging everything and moving the head unit and relay box to another outlet on another wall. I hooked up the pH probe and stuck it in a glass of water and still got a small shock. I am getting a multimeter tomorrow as well, I'm curious to see what you find out.

Re: pH probe shocking tank?

Posted: Mon Jun 30, 2014 9:42 pm
by fatman
Mine was my LEDs with Meanwell ELN 60-48P drivers. None of the cords was touching the tank, the outlet was not going through the relay box, just the driver signal from my PWM port on the relay box. Unplugged it and it went away. I have since moved it to a dimming expansion model, but haven't had time to see it that helped.

Fat

Re: pH probe shocking tank?

Posted: Tue Jul 01, 2014 8:43 am
by Gugs Jr
fatman wrote:Mine was my LEDs with Meanwell ELN 60-48P drivers. None of the cords was touching the tank, the outlet was not going through the relay box, just the driver signal from my PWM port on the relay box. Unplugged it and it went away. I have since moved it to a dimming expansion model, but haven't had time to see it that helped.

Fat
That seems odd that the LEDs would do this. I'm wondering if there is another way to wire them up.

I went with the reef angel so that I wouldn't have to change my drivers.

Re: pH probe shocking tank?

Posted: Mon Feb 15, 2016 1:39 pm
by joaocdestro
I have these same issues, ph probe and Meanwell, did you found the issue?

Re: pH probe shocking tank?

Posted: Thu Feb 25, 2016 6:22 pm
by saf1
What exactly was the stray voltage related or isolated to?

Only reason why I'm asking is because I was going to order a pH probe replacement and set it back up. I am using a pair of multi chip LED's with each using a pair of MeanWell LDD's and power supply. They are connected up to the expansion hub but I am using the relay box Daylight/Actinic ports for my R4's Jebao.

Would hate to introduce voltage or whatever it is doing. I would hate to shock or hurt a family member while away on travel when they feed the tank for me. I'm sure I'd get the mother of all molly whoppin's when I entered the door even if I got picked up at the airport - lol.