anyone heard of this and know how to use it

[mwoodruff964]

Ok so I went to my lfs and asked for refracto calibration fluid and they gave me a little packet of hanna instruments 800 ppm tds solution. Never seen it before but anyway got home put a couple of drops on the refracto and was off zero just a little bit. My question here is I thought calibration fluid was supposed to put your refracto at 1.026 since thats what we measure for? I'm I doing something wrong or did the idiot behind the counter give me something that has nothing to do with refracto calibration?

[seapug]

that's for a TDS meter to measure freshwater purity.

[mwoodruff964]

great!!!! thanks seapug i figured as much

[seapug]

since it's a solution of known density you could probably use it to calibrate a refractometer using a conversion to PPT, but that's really not what it's made for.