Calibrating Refractometer

[Stones]

Originally Posted by jason604

I just use 0ppm rodi water. Dunno if that's the right thing to do but hey it's working n free!!! Lol

I used to do this as well but it is much better to calibrate with a known 35 ppt solution such as the pinpoint one listed above.

Using 0 ppm RODI water to calibrate my refractometer, my salinity was acutally at 1.028 when the refractometer was reading 1.025. Didn't know this until after I had used the pinpoint solution to calibrate.