How to convert sugar meter readings to concentration percentage
The refractive index of each cutting fluid is different, but there is a relatively accurate method.
Buy a 0-32% refractometer, configure 5% cutting fluid dilution, and read with a light meter, then the refractive index of this cutting fluid is 5%. Daily, calculate the concentration according to the reading of the refractometer, add some water if it is high, and add cutting fluid if it is low.
How to read the handheld refractometer
The general recommended method is to add 5% for the first time, and add 3% each time after that, and use it in a cycle. With this method, after a lot of practical operations, it can basically ensure that the daily use concentration is 4- 6%. It has a lot to do with whether the amount of cutting fluid taken by each worker is accurate.
In order to protect the cleanliness of the dial, the refractometer generally installs the dial in the cover. When reading, first open the small window above the cover to let the light enter, and then read the corresponding indication on the scale from the reading telescope.
Since the eyes are prone to fatigue when judging whether the critical line is at the intersection of the quasi-filaments, in order to reduce accidental errors, turn the handle and repeat the measurement three times. The difference between the three readings should not be greater than 0.0002, and then take the average value.
The influence of the composition of the sample on the refractive index is extremely sensitive. Due to contamination or evaporation of volatile components in the sample, small changes in the composition of the sample will result in inaccurate readings. Therefore, when measuring a sample, it must be Samples were taken three times, the data of these three samples were measured, and the average value was taken.
