After checking that the sensor wiring is correct, turn on the power of the control cabinet and preheat it for 15 minutes before proceeding with the debugging. This article will introduce the following examples based on the maximum weighing capacity of 100kg, a graduation value of 0.2kg, a quantitative value of 90kg, and an accuracy level meeting the technical requirements of X(0.2):
(1) Load imbalance adjustment
Place 10kg weights respectively at the two supporting points of the weighing hopper. When the weighing display shows "positive difference", the sensor output should be adjusted in the lowering direction; when the weighing display shows "negative difference", the sensor output should be adjusted in the raising direction. For example: when the output of the L/C-1 sensor decreases, rotate the corresponding group of fine-tuning resistors (the original value is 10 ohms) to the left by the same rotation amount. Rotating to the right (clockwise direction) reduces the resistance value and increases the display value (recorded as "add"); rotating to the left (counterclockwise direction) increases the resistance value and decreases the display value (recorded as "subtract"). Note: When rotating the fine-tuning resistors, if the rotation amounts of the two resistors in each group are not consistent, it will make the adjustment difficult. Therefore, the rotation amount of each group of fine-tuning resistors during adjustment should be as consistent as possible. The absolute value of the error at each supporting point should not exceed 10g to be qualified.
(2) Weighing adjustment
Carry out weighing adjustment according to the calibration steps specified in the weighing display controller manual. During inspection, increase the weights in the order of 0kg, 40kg, 70kg, 90kg, 100kg from the zero point to the maximum point, and the error should not exceed 10g, 20g, 35g, 45g, 50g respectively; decrease the weights in the order of 100kg, 90kg, 70kg, 40kg, 0kg from the maximum point to the zero point, and the error should not exceed the respective tolerance; repeat the verification at the two quantitative points of 40kg and 100kg, and perform 3 measurements at each weighing point, with the error not exceeding the respective tolerance.
