New Refractometer

[Big Larr]

When buying a new refractometer should you calibrate it before using it or should it be good to go

 

[143MPCo]

calibrate, calibrate, calibrate... also "calibration" and readings should be done under the same light source each time.

 

[Big Larr]

Thank you so much will definitely do

 

[Big Larr]

Have you heard of using rodi to calibrate with and what do you think about it

 

[143MPCo]

Have you heard of using rodi to calibrate with and what do you think about it

That's correct... RO/DI at 0-TDS is needed to calibrate it to zero.

 

[phillrodrigo]

I would buy a calibration fluid. They aren't expensive. I believe Randy has a recipe for a calibration fluid. You should calibrate closest to what your testing. Rodi may be close buy will be off some.

 

[Big Larr]

Thank you all very much

 

[143MPCo]

My Milwaukee Instruments Seawater Digital Refractometer came with calibration fluid, and was used to calibrate the unit... Just happens I also tried RO/DI water with the unit and it was spot on... If you have "calibration fluid" use it but if you're in a pinch I personally feel 0-TDS RO/DI will also work.

 

[Big Larr]

Awesome thank you