Techniques and safety precautions for temperature-correcting and calibrating a portable sugar refractometer
Calibration and temperature correction methods and precautions for hand-held sugar refractometer
1. Hand-held sugar content refractometer calibration and temperature correction
The instrument needs to be zero-calibrated before measurement.
Take a few drops of distilled water, put it on the detection prism, and turn the zero adjustment screw to adjust the dividing line to the 0% position of the scale. Then wipe off the detection prism for detection. Some models of instruments need to configure standard solution instead of distilled water when calibrating.
Another method is (only suitable for the determination of sugar content): use the temperature correction table to add (or subtract) the temperature correction value to the value read at the ambient temperature to obtain an accurate value.
2. Precautions for hand-held sugar refractometer
The instrument is a precision optical instrument, and the following items should be paid attention to during use and maintenance:
1). You must be careful and cautious during use, use it strictly according to the instructions, do not loosen the connecting parts of the instrument arbitrarily, do not drop, collide, and violent vibration is strictly prohibited.
2). After use, it is strictly forbidden to put it in water directly for cleaning, and wipe it with a clean soft cloth. For the optical surface, it should not be scratched or scratched.
3). The instrument should be kept in a dry place without corrosive gas.
4). Avoid loss of spare parts.
3. The sugar content meter currently on the market is divided into:
Non-destructive sugar meter: without cutting the fruit, directly touch the probe head to the surface of the fruit to be tested to measure the sweetness of the fruit.
Portable sugar content measurement: Before picking the fruit, measure the sweetness of the fruit to ensure the uniformity of the sweetness and improve the production management goals of the crop.
Computerized Sugar Tester: Each fruit has been tested for sweetness, according to quality inspection, grading, processing and packaging operations, which can increase the high price.
