I got my Apex set up the other day and calibrated the Salinity probe. When I put it in my water it was right on at ~35ppm, but shortly after it dropped to about 20ppm. After doing some research, I learned that these probes need a "break in" period, so I decided to leave it alone for a few days. Sure enough, all of a sudden yesterday the value started increasing. This morning it is now up to 30ppm. I'm expecting it to creep right back up to its accurate measurement...
But the scientist in me just needs to know how/why this occurs with these probes? Would someone mind explaining? Why would the correctly calibrated probe suddenly loose calibration significantly but then slowly creep back up?
Here's the graph:
But the scientist in me just needs to know how/why this occurs with these probes? Would someone mind explaining? Why would the correctly calibrated probe suddenly loose calibration significantly but then slowly creep back up?
Here's the graph:
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