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-   -   Manually adjusting for temperature (http://www.hydroponicsonline.com/forums/showthread.php?t=1988)

someone 05-08-2011 03:40 PM

Manually adjusting for temperature
I have a TDS meter for measuring nutrient solution, but I know fro research and experimentation that the measurement is dependent on the temperature of the solution, so when the temperature goes up, the reading goes up for the same actual amount of nutrient. How would I, for example, find the actual concentration nutrient if my meter reads 800 PPM NaCL and the temperature is 85 F? I have seen TDS meters that have built in thermometers, and they can do this automatically, so I know its theoretically possible.

GpsFrontier 05-08-2011 05:18 PM

My best advice is to contact the manufacture (or check there website), and see if they have a temperature adjustment chart (it may be included with the owners manual). Just like conversion rates from EC (that all meters use) to convert to the TDS reading you see on the meter. I'm sure any accurate temperature adjustment would be dependent on the manufacture, model number, and region of the world where it was built.

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