A field sample is a measurement taken from the process that has the calculated average of 10 consequent measurements. A field sample is usually taken when a snapshot of the process condition is needed.
To take a field sample, select the refractometer >
.The result of the field sample is displayed on the screen, with date, time and measurement results. The results can be used to calculate corrections against a laboratory or other reference if needed: For example, if the raw concentration (the measurement value without field correction) indicates a value of 10.0, and laboratory reference indicates a value of 9.0, the required field offset would be -1.0 to make the refractometer reading to match the laboratory.