SAL readings going crazy, PH now off

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bencollinz
Posts: 151
Joined: Wed Mar 13, 2013 5:36 pm

SAL readings going crazy, PH now off

Post by bencollinz »

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no clue what is going on. everything's been fine for 4 days and then today this...see attached.

re-calibrated both sensors, no help.

my refrac says the water is 1.026...
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rimai
Posts: 12881
Joined: Fri Mar 18, 2011 6:47 pm

Re: SAL readings going crazy, PH now off

Post by rimai »

What happens when you place the probe in a cup with tank water?
Roberto.
bencollinz
Posts: 151
Joined: Wed Mar 13, 2013 5:36 pm

Re: SAL readings going crazy, PH now off

Post by bencollinz »

rimai wrote:What happens when you place the probe in a cup with tank water?
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it's declining still but now it's steady.
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rimai
Posts: 12881
Joined: Fri Mar 18, 2011 6:47 pm

Re: SAL readings going crazy, PH now off

Post by rimai »

That looks like you got some sort of stray voltage.
Can you double check you pumps and float switches?
Roberto.
bencollinz
Posts: 151
Joined: Wed Mar 13, 2013 5:36 pm

Re: SAL readings going crazy, PH now off

Post by bencollinz »

rimai wrote:That looks like you got some sort of stray voltage.
Can you double check you pumps and float switches?
this started when I added the water level expansion.

I don't have any float switches in there yet. I unplugged everything including return pump and got this...
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rimai
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Re: SAL readings going crazy, PH now off

Post by rimai »

Strange...
What happens if you disconnect the water level?
Roberto.
bencollinz
Posts: 151
Joined: Wed Mar 13, 2013 5:36 pm

Re: SAL readings going crazy, PH now off

Post by bencollinz »

rimai wrote:Strange...
What happens if you disconnect the water level?
I unplugged everything except the SAL, including temp and PH and now it says SAL is 6ppt.

If I put the probe in the calibration fluid it's 6ppt as well.

what the heck should I try next?

I rebooted as well, no change.
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rimai
Posts: 12881
Joined: Fri Mar 18, 2011 6:47 pm

Re: SAL readings going crazy, PH now off

Post by rimai »

Is the salinity module connected straight into the relay box?
Roberto.
bencollinz
Posts: 151
Joined: Wed Mar 13, 2013 5:36 pm

Re: SAL readings going crazy, PH now off

Post by bencollinz »

so, to sum up all my troubleshooting, one word, microbubbles. thank you for your help!

moved the sensors to a different part of my sump and all is grand now.
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