Nowadays, weighing control instruments are used in industrial equipment, food processing and other industries. And when we use electronic crane scales, automobile floor scales, electronic forklift scales, etc., there will be some minor problems, how should we repair them.
The fault diagnosis and analysis in the use of weighing instrument repair sensors. The fault phenomenon of automatic weighing instrument is always displayed on the terminal display of the system. After the fault phenomenon is manifested, do not blindly dismantle the weighing sensor. Firstly, judge the fault from Which part of the measurement system. The following measures can be taken:
1. Open the middle junction box, and use a multimeter to detect the working status of each sensor to determine whether a certain sensor is faulty. Use the above methods to narrow down the scope of the fault, find the faulty sensor and understand the operating conditions of the fault in time and perform fault diagnosis. Therefore, the fault caused by the sensor is often related to the illegal operation or the abnormal mechanical device;
2. Check the installation status of the interface MBI shear beam load cell mechanism;
3. Remove the mechanical fault and use a shake meter to check whether the cable is injured.
Next, we will talk about some basic understandings on the maintenance points of automatic load cell instruments and the use and maintenance of load cells:
The use characteristics and faults of the load cell sensor:
1. The ambient temperature has different effects on load cells of different grades. The ambient temperature of the sensor at the use site is far from that during the verification operation. Therefore, when the user finds that the sensor has excessive temperature drift during use, measures should be taken to create a local relatively constant temperature environment around it.
2. Zero point change caused by overload and eccentric load. In use, if the force application plane is not parallel to the supporting base surface, the eccentric load condition will be bad. Overload or eccentric load will cause a large plastic deformation in a certain part of the elastic body, the zero point will suddenly become larger, and the local stress will exceed the strength limit, which will cause damage to the sensor.
3. Zero point change caused by electromagnetic field interference. If the space electromagnetic field in the application site is suddenly impacted or changed, a considerable amount of induced electric potential is excited on the bridge network or signal transmission line, which will cause the sensor output to fluctuate.
Precautions for the use of load cell sensors:
1. The screen cover and the shell are grounded to ensure that the sensor itself has a stable zero potential;
2. It is forbidden to place heavy objects on the weighing platform for a long time to prevent the sensor from creeping;
3. Check the system frequently for irregularities;
4. The ground potential grounding should consider the change of the power equipment load and the influence of lightning.
Weighing sensor, weighing module, weight transmitter, weighing control instrument, weighing application system
