Why is my Refractometer stuck 30ish PPT?

[Krixic]

Just got a BRS ATC refractometer today to compare it to my hanna (funny how I'm using a 30 dollar instrument to test the accuracy of an 80 dollar one ). Thing is, when calibrating (using calibration fluid) I cant seem to move the line above 30/31 (I'm trying to get it to 35 per the instructions). It goes below that number just fine but won't budge past it. I can still keep twisting the calibrator past it but it remains still. What am I doing wrong?

 

[h2so4hurts]

Sounds broken. Get another one. Or make sure you're calibrating to 35ppt solution and not RODI

 

[Krixic]

Sounds broken. Get another one. Or make sure you're calibrating to 35ppt solution and not RODI

Yea im calibraring to 35ppt solution. Ill give brs a call today and see what they say. Im sure they will replace it.