What's Wrong With My Refractometer?

[Nanna]

Tonight my hubby decided to calibrate our refractometer (been awhile since it was done so just wanted to check it). It did need a small adjustment. Then he tried to check the water in our tank and the refractometer just stayed on zero. Any ideas why it would stop working? It's only about 6 months old and we've never had problems with it before. Any comments or suggestions will be appreciated.

 

[AdeptMrSniffles]

what brand is it? Did you let it temp adjust for atleast 20min with fresh water? (or atleast that's how mine works)

 

[Nanna]

It doesn't have a manufacture's name on it but I bought it from Foster & Smith. It's model number RHS-10ATC. I only have to wait 30 seconds to take a reading because it has automatic temperature compensation. Thank you for your reply.

 

[little_fish]

with most refractometers you can also adjust the focus of the lens, the line just might be out of focus. Mine adjusts by twisting the eye piece

 

[fastrd400]

What are you using to calibrated it with, RO water? Or are you using a 35ppm saline solution?

 

[Nanna]

I'm using the calibration fluid that I ordered with the refractometer.


Edit: Thanks Little Fish, I'll check that to see if it might be my problems.