My digital refractometer appears to be out of calibration. Using RODI I will zero the unit and then test my sample.
When I test known calibration solutions at 35 ppt, they always read 37ppt.
I have two different calibration solutions and they both report 37ppt.
I have been running my tank at 37ppt as per the refractometer assuming that it is actually 35ppt.
Does this sound reasonable? Should I buy another method of testing salinity ?
Should I trash this Milwaukee ? It is around 4 years old.
When I test known calibration solutions at 35 ppt, they always read 37ppt.
I have two different calibration solutions and they both report 37ppt.
I have been running my tank at 37ppt as per the refractometer assuming that it is actually 35ppt.
Does this sound reasonable? Should I buy another method of testing salinity ?
Should I trash this Milwaukee ? It is around 4 years old.