In fact, to do a good job in the maintenance of electronic weighing apparatus is basically basic skills, which is basic knowledge plus basic skills. As we all know, electronic scales are electronic technology, sensor technology and machinery Electronic weighbridge Comprehensive application of manufacturing technology. If you know the basic knowledge and can master some maintenance skills well, you can get twice the result with half the effort.
1. Grasp the characteristics of fault phenomenon
The fault phenomenon can often directly reflect the essence or location of the fault, so we can form a clear maintenance idea according to the specific fault phenomenon. For example, if the zero point indication of the most common electronic truck scale is not stable, the fault location can be identified according to the characteristics of the fault phenomenon. If only the platform can not return to zero after passing the loaded vehicle, the fault location should be the place where the scale body collides with the foundation pit wall, the electronic scale manufacturer or the spacing adjustment of the limiting device is improper and other mechanical problems. If the zero point indication has been unstable over time, then we should consider whether the shielding grounding of the load cell is good? What is the insulation resistance of the load cell? If the zero point indication is not always unstable, but is sometimes stable and sometimes unstable, it is recommended by the electronic weighbridge that it may be affected by electromagnetic interference. Pay attention to check whether there are high-power electrical equipment running nearby, especially pay attention to some frequency conversion equipment.
2. Grasp the fault characteristics of the device
The aging of components is caused by moisture, dust, oxidation, wear, heating and other reasons. The junction box of the electronic truck scale is generally installed under the outdoor scale body, which is easily affected by moisture and pollution. When the truck scale has a fault, it is the focus of search and the object of treatment.
For example, the indication of the electronic truck scale jumps frequently, most likely because the junction box is damp. It is recommended to open the junction box and scrub it with alcohol at this time. After the electric hair dryer dries, the fault can be eliminated. The other possibility is that the signal bus from the junction box to the instrument is broken. At this time, we can pull the bus to see whether the digital jump of the instrument is obvious. If the bus indication has obvious jump once pulled, then we need to focus on the signal bus. We can try to change the signal bus to see whether the fault is eliminated.
