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SAL readings going crazy, PH now off
Posted: Thu Mar 21, 2013 4:27 pm
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...
Re: SAL readings going crazy, PH now off
Posted: Thu Mar 21, 2013 6:01 pm
by rimai
What happens when you place the probe in a cup with tank water?
Re: SAL readings going crazy, PH now off
Posted: Fri Mar 22, 2013 8:00 am
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.
Re: SAL readings going crazy, PH now off
Posted: Fri Mar 22, 2013 8:42 am
by rimai
That looks like you got some sort of stray voltage.
Can you double check you pumps and float switches?
Re: SAL readings going crazy, PH now off
Posted: Fri Mar 22, 2013 12:02 pm
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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Re: SAL readings going crazy, PH now off
Posted: Fri Mar 22, 2013 12:05 pm
by rimai
Strange...
What happens if you disconnect the water level?
Re: SAL readings going crazy, PH now off
Posted: Fri Mar 22, 2013 12:31 pm
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.
Re: SAL readings going crazy, PH now off
Posted: Fri Mar 22, 2013 12:57 pm
by rimai
Is the salinity module connected straight into the relay box?
Re: SAL readings going crazy, PH now off
Posted: Sun Mar 24, 2013 8:21 am
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.