I have been having issues with my salinity probe readings. I initially calibrated with 35ppt solution used for refractometers. The value from the calibration screen was ~30ppt. Then I placed the probe in my tank and it read 20ppt and it has been decreasing steadily. I have cross checked salinity with 2 separate refractometers, one of them temperature compensating, and I have 36ppt. Heck, I even used the floating needle type and it was in the 36 neighborhood.
Thinking it was maybe temperature related I tuned on the temperature compensation function and re-calibrated, but same results. Anyone have any idea about this or has run into the same issue?
Any help is gladly appreciated!
P.S.: My first post, so please be gentle...
Hugo
Issue with Salinity Expansion/Probe
Re: Issue with Salinity Expansion/Probe
Can you place it in a cup of tank water, calibrate and leave it there for a few days?
Roberto.
Re: Issue with Salinity Expansion/Probe
OK, I was scanning on the forums and ran into someone that said micro-bubbles may affect salinity readings, so I moved to the pump side of the sump, away from the skimmer and it is holding at 30 ppt, however, my salinity is 35ppt, not 30. Anything else I should be checking?
Re: Issue with Salinity Expansion/Probe
Try recalibrating with the probe in the tank.
Your solution may not be good for electronic meters.
Remember that we are measuring conductivity and not light refraction.
Your solution may not be good for electronic meters.
Remember that we are measuring conductivity and not light refraction.
Roberto.