How to detect the failure of the load cell of the checkweigher?
We know that, as a dynamic weighing and measuring equipment, the weighing of the checkweigher is inseparable from the load cell. Despite its small size in the whole set of equipment, its role is not small. In the daily production activities of the enterprise, the checkweigher continues to 'work out' in the workshop; for a long time, due to various reasons, some problems will inevitably occur with the weighing sensor as a key part, which will lead to the failure of the checkweigher machine to continue to be used normally. . So, if we suspect that there may be a problem with the load cell of the checkweigher machine, how can we check and deal with it? First of all, when the belt scale is in a static state (the conveyor is stopped at no load), we can measure the output voltage and excitation voltage of the load cell on the terminal of the instrument to judge. If the output voltage is found to be unstable and the excitation voltage is normal, the terminals should be checked again in the junction box. If the measurement results in the box are correct with the measurement results at the instrument end just now, and there is no abnormality at each connection of the load cell, if the belt scale has only one load cell (usually a pressure sensor), we can consider replacing it It's gone. In the case that the checkweigher is composed of two load cells in parallel (usually a pull-type sensor), the output line of the load cell can be removed from the terminal, and then the output of the two load cells can be measured separately. voltage, find the sensor whose output voltage is abnormal and replace it. If there is no problem with the above static measurement, for a single load cell checkweigher, the sensor can be replaced for testing; and for a double sensor checkweigher, remove the output wire of one of the load cells from the terminal of the junction box. Then, only another load cell is used, and then the checkweigher can be started and the zero value stability of the checkweigher machine can be measured in the idling state. Then the load cell that caused the poor stability of the zero value should be replaced in time. It is worth noting that when replacing the load cell, be sure to carefully check the relevant technical parameters of the equipment, and pay attention to keep them consistent.
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