How is a refractometer calibrated?
How is a refractometer calibrated?
To calibrate the refractometer, do the following: Make sure the calibration fluid* and the refractometer are at the same temperature. Open the cover and put a drop of calibration fluid onto the prism. Adjust the calibration screw on top of the refractometer until the brix value reads 70.
How do you clean a refractometer?
To clean the refractometer use a soft cloth or soft tissue paper moistened with water and wipe the prism and bottom surfaces of the cover plate. Dry the surfaces with a soft cloth or tissue paper. If the surfaces are not well cleaned before the next sample is loaded, an erroneous or fuzzy dividing line may result.
How will you read the results using the refractometer?
Point the front of the refractometer again toward a light source and look into the eyepiece. You will now see the line delineated at a different point on the refractometer’s internal index. Read the point on the index at which the line falls to determine the refractive index of your liquid sample.
How often should I calibrate my refractometer?
WC every two weeks, and would check the refractometer using a seawater standard solution(35ppt/1.026), but would rarely need any adjustment.
Do you need to calibrate a refractometer?
Refractometers should be calibrated at the beginning of each use and, depending on how many samples are being measured, periodically throughout the sampling process. Proper calibration requires a pure water source and testing solutions of known sucrose concentration.
Can you use alcohol to clean a refractometer?
Please do not over apply the Isopropyl Alcohol as in large quantities it can attack the binder that keeps your prism glued to your refractometer! Clean and re-clean as needed.
Why ether or acetone Cannot be used for cleaning purpose of refractometer?
Do not use acetone or ethyl acetate to clean the refractometer prisms because they can dissolve the adhesive holding the prisms in place.
