T-15 reads lower than K-1766. OK?

Thanks so much for your response. The salt readings were always closer the first couple of years we had the pool. Lately they have been further off, so I just wanted to make sure we didn’t have a problem!
 
To get the performance of the cell, divide the instant salinity by the actual salinity.

If the ratio is less than 75%, it's time for a new cell.

For example, 2,000 (instant salinity) ÷ 3,600 (measured salinity with a test kit)=56%.

Check the cell and clean it if necessary.

If that doesn't work, it's time for a new cell.

 
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