What are the maintenance and troubleshooting methods of electronic belt weigher? Follow the small knitting of the belt scale manufacturer.
1 Calibration of drift
Calibrate drift frequently to reduce drift of zero point and interval.
2 Drift of zero point calibration
Generally, the zero drift is related to the conveying system. When the zero drift occurs, the interval drift will occur.
General causes of zero drift:
1. Weigh the dust and materials on the bridge;
2. The stone is stuck in the weighing bridge;
3. Sticking material of conveyor belt;
4. Uneven conveyor belt;
5. Due to the temperature characteristics of materials, the belt of the conveyor is stretched;
6. Failure of electronic measuring elements;
7. Severe overload of load sensor.
3 Drift of interval calibration
Generally, the interval drift is related to the measuring components of the system and the belt tension.
1. Change of conveyor belt tension
2. Speed sensor roller sliding;
3. Serious overload of load sensor;
4. Failure of the electronic measuring element (the output of the multimeter measuring sensor is about 2MV without load).
4 Field wiring
1) Check the corresponding internal wiring between components in the system, and all wiring must be carried out in accordance with the provisions of the field wiring diagram;
2) Check whether all wiring and connections are firm, short circuit and resistance to ground;
3) When the contact is loose, the welding is not reliable, there is short circuit or open circuit, and the grounding is not as required, the reading error and unstable weighing reading will occur;
5 Check the weight signal input
To check the weight signal input, do the following:
1. Power on
2. No load
The weight signal value in the diagnosis menu displays the number of weight input feeling. The displayed value is about 2mv, indicating that the weight input is normal. The displayed number increases with the weight increase and decreases with the weight decrease. When the displayed value exceeds the normal value by plus or minus 2mv, it indicates that the weight sensor is abnormal (the multimeter directly measures the sensor output in the junction box to confirm the specific sensor number is abnormal), and the wiring or main board is damaged.
