Oginme
Grandmaster Brewer
For any instrument, a single point calibration is near useless. I make my own sugar solution which is the nice thing about working in a lab with analytical scales.
With your salinity refractometer, having a calibration point at or near your target is of some value, but the correction for being off will be skewed if the refractometer has the wrong slope to it. A zero point and one near the desired target confirms both the slope and intercept of the calibration curve, which allows for more accurate corrections and interpretations.
With your salinity refractometer, having a calibration point at or near your target is of some value, but the correction for being off will be skewed if the refractometer has the wrong slope to it. A zero point and one near the desired target confirms both the slope and intercept of the calibration curve, which allows for more accurate corrections and interpretations.