Big divergence between measured salt level and what the SWG reports

cheezedawg

0
Bronze Supporter
May 12, 2012
71
Elk Grove, CA
I’m measuring around 3200ppm, but the salt cell is only reporting 2100ppm. I just went and bought fresh salt test strips but got the same result.

My next step is to acid clean the SWG- could that cause this discrepancy or is the SWG just going bad?
 
I notice a bigger difference between the salt test and the onboard sensor when the water is cold. I haven't turned on my swg yet (about to do it today), but I expect to see it show a low level. In the summer when the water is 87 degrees it tends to get within a few hundred of my test results.
OP, you and I live in the same general area, so I'm guessing your water temp is near 60ish degrees right now?
 
I notice a bigger difference between the salt test and the onboard sensor when the water is cold. I haven't turned on my swg yet (about to do it today), but I expect to see it show a low level. In the summer when the water is 87 degrees it tends to get within a few hundred of my test results.
OP, you and I live in the same general area, so I'm guessing your water temp is near 60ish degrees right now?
Yes water is around 60. I can heat up the spa water to see if that changes anything.
 
Thanks- salt is the only thing I used strips for but it’s always been close enough. I’ve never seen it 1000+ ppm different than what the SWG reports.
That's all fine and dandy *until* it reports a 1k difference. Then there is no way in h - e - double hockey sticks you are tearing out the flow switch per a test strip.

Test with a k1766 and go from there.
 
I heated up my spa to 80 degrees and now the salt cell is reading 3200ppm- looks like it is just struggling with the lower water temp. Everything lines up. The water is a bit colder than when I normally start trying to open the pool. Weird cold weather. We’ve been swimming in March in some years in the past.
 
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I heated up my spa to 80 degrees and now the salt cell is reading 3200ppm- looks like it is just struggling with the lower water temp. Everything lines up. The water is a bit colder than when I normally start trying to open the pool. Weird cold weather. We’ve been swimming in March in some years in the past.
Was it generating when it was reporting 2100?
BTW I started up my SWG today and it was reporting 2700 when my k1766 test gives me 3400.
 

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