How to adjust the weighing error of the moisture analyzer?
1. Adjustment of the weighing error of the moisture analyzer
The balance in the moisture meter is a quantitative balance, and its structure belongs to the two-knife beam structure balance, which is similar to the single-pan balance structure. Its particularity is that the amount of the item it weighs is a certain value. When weighing, the material in the pan is always At this time, the balance can be guaranteed to be in the zero-point balance state, that is, in the "no-load" state. When the 10g combined standard weight is put on for calibration, the balance position of the balance is not at zero, but there is a deviation. The deviation can be eliminated by adjusting the balance. When the deviation is small, adjust the small balance at the front end of the balance. , if the deviation is large, the beam can be taken out, and the large balance thallium at the rear of the beam can be adjusted until the balance is in a balanced position. It should be noted that after the adjustment is completed, the balance thallium must be tightened. In order to prevent the balance thallium from loosening and causing the variability of the weighing error to be out of tolerance.
2. Adjustment of the division value of the fast moisture analyzer
Whether the moisture content of the item measured by the rapid moisture analyzer is correct or not depends on the correctness and error of the division value of the instrument's label. As an important measurement technical index, the division value must be adjusted after the weighing error of the balance is adjusted. Check the graduation value of the sign. The method is to take out a 1g standard weight from the weighing pan. At this time, through the projection screen, the scale line at the end of the sign should coincide with the baseline on the light screen, and the error should not be greater than ±1 division value. If the error exceeds the allowable value, the beam of the balance should be taken out, and the division value should be adjusted by rotating the center of gravity thallium. Since the pointer of the beam of the quantitative balance of the fast moisture analyzer is upward, and the center of gravity is at the lower end, which is opposite to the installation method of the beam of the ordinary balance, the adjustment method of the center of gravity of the balance is opposite to that of the general balance. After taking out the beam, put the pointer Downward, when the division value is large, rotate the center of gravity counterclockwise, that is, increase the distance between the center of gravity and the fulcrum blade; when the division value is small, rotate the center of gravity clockwise to reduce the distance between the center of gravity and the fulcrum blade , Adjust the graduation value to meet the requirements, and then tighten the center of gravity thallium.
