TDS calibration

[SmyrnaReefer]

does anyone locally sale calibration solution? im curious to see if my dual in-line TDS meter is lying to me...

 

[Pickupman66]

I didnt know there was a TDS solution you could use. I check mine against a handheld meter.

 

[nightfire]

I didnt know there was a TDS solution you could use. I check mine against a handheld meter.

they even sell it for hand helds too....i use distiled water to make sure mines ok

 

[GT_Jacket]

BRS sells this. Anybody ever used it?

http://www.bulkreefsupply.com/store/products/reverse-osmosis-filters-and-systems/ro-di-accessories/tds-342-calibration-solutions.html

 

[Jennifier615]

I use millipore water from the lab that is quality control checked......I may could get some extra.

 

[Tomoko Schum]

Here's Dr. Randy's DIY instruction for TDS meter calibration solution.

He prefers that we use salt water solution than freshwater solution.

 

[Jennifier615]

That doesn't seem right to me....I want to make sure that my DI water is truly at zero before I add salt. Am I not correct in thinking that when you add salt solution your TDS is gonna be elevated by the elements added in the solution which would give an opportunity for unwanted dissolved solids to hide in a mixed solution....If you start with 0 TDS with RO/DI water you can say safely when you mix salt your ending elevated TDS is all solvents that belong there....

Here's Dr. Randy's DIY instruction for TDS meter calibration solution.

He prefers that we use salt water solution than freshwater solution.

 

[NeveSSL]

Did you read it, Jennifer?

Its for salinity, not TDS.

Is there a different one for TDS, Tomoko? Or is that the correct one, I just missed it?

Brandon

 

[Tomoko Schum]

Oops, I am sorry, I was thinking about refractometer. Someone was just asking about a refractometer on another thread.

I use a commercial (BRS's) calibration fluid for my TDS meter (the one made for TDS calibration.) I had to do this recently since my hand held TDS meter and my inline TDS meter did not agree with each other.