Common faults and solutions of electronic platform weighing instruments
The key to the maintenance of the electronic platform weighing instrument is to maintain the weighing platform and the area where the sensor is placed, because if there is enough water in this area, it will endanger all the normal applications of the sensor. Therefore, it is necessary to set up a work shed and a weighing room so that the sensors can be maintained very well. In addition, the intersections between the weighing platform and the leading slope must also be well connected, otherwise it is very easy to produce collisions and frictions, and the heavy symmetry will inevitably lead to certain hazards. In addition, it is necessary to regularly maintain whether there is any dirt stuck on the bottom of the electronic truck scale. If there is dirt stuck, it will also harm the data signal transmission of the sensor, so it must be removed immediately. If the maintenance is not carried out, it will cause common failures of the sensor, and the maintenance of the load cell is an inconvenient thing. Since the sensor involves several levels, if the maintenance is not good, you must replace it with a new one. Sensors, this will cost a lot of money. Below, Guangdong Kenweigh will introduce the common faults and solutions of electronic platform scale weighing instruments for everyone. Common faults and solutions for electronic platform weighing instruments: (1) Analysis of common faults that cannot return to zero after the hanging object is cleared. Check whether the output data signal value of the load cell is within the specification (A/D total increase) Code/application code category/base code category), if the data signal value is not within the specification, adjust the variable resistance of the sensor, and adjust the data signal value to the specification. If there is no compensation, please check if there is any problem with the sensor. Under the condition of ensuring that the sensor output is all normal (the scale body is stable), the common faults of the instrument panel are locked, usually the operational amplifier and the A/D conversion power circuit have problems, and then the circuit principles are distinguished, detected and analyzed one by one to finally solve the difficulties. (2)Analysis of common faults of inaccurate weighing. Observe whether the internal code value is stable, whether there is friction in each part of the sensor, whether the adjustable regulated power supply is stable, and whether everything is normal in the power circuit during operation, use the standard The weight checks whether the four-foot scale with the weighing pan is symmetrical. According to the label in the instructions for use, further carry out partial analysis or net weight calibration of the instrument panel. (3) The common faults that electronic platform scales cannot be turned on are the first to clarify the problems caused by non-fuse, main power switch, power plug and working voltage changeover switch, and check whether the transformer has AC current input and AC current output. If the dashboard contains a rechargeable battery, the battery can be disassembled and then started with AC switching power supply to check whether the car battery voltage is insufficient. Secondly, check whether the inverter circuit, stabilized power supply circuit, and display information optocoupler circuit are abnormal. If there is no problem, check whether the CPU and attached power supply circuit are burned out.
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