Electronic Weigh Scale. Car Floor Scale. Electronic Floor Scale Troubleshooting

Example 1

Failure phenomenon: An electronic weighbridge with a range of 120 tons, when compared with three points on the lower end of the scale, the car after the balance of the instrument has a residual value of tens of kilograms to one hundred kilograms.

Fault Analysis: The fault phenomenon can be judged not to be the cause of the instrument. Because there is no obvious hop count when measuring, it is estimated that it will not be caused by the broken sensor line or the damage of the sensor. Therefore, the judgement is likely to be a mechanical reason. After checking the limit, it was found that the scale end stop of the scale body has been dead, causing the scale to weigh. Poor freedom, the vehicle does not return to zero after balancing.

Troubleshooting: Adjust the limit gap so that the limit gap is maintained within 2 to 3 mm.

Example 2

Failure phenomenon: An electronic scale weighing 120 tons, in the measurement of vehicles below 20 tons when the meter display is normal, in the measurement of heavy vehicles, the meter value jump phenomenon, the number of hops in the range of tens of kilograms to one hundred kilograms, after Compared with other scales, the total amount is low. When the car is under the balance, it can return to zero.

Fault Analysis: The fault phenomenon can be judged not to be the cause of the instrument. Because there is no fault in the measurement of light vehicles, and the number of hops in heavy vehicles is not a special rule, it is estimated that it will not be caused by the breakage of the sensor line. It may be due to mechanical reasons. After checking the limit, there is no problem. Finally, the vehicle is found to be free. It was very poor. After inspection, it was found that several places on the bottom of the scale body were dead by muddy ice and other debris.

Troubleshooting: Remove the debris under the truck scale body and restore the scale platform freedom.

Example 3

Symptom: An electronic scale sometimes displays a negative overload after the heavy vehicle is turned on, and sometimes it can return to normal after restarting. This phenomenon often occurs.

Failure analysis: sometimes there is no fault, it is not estimated that the reason of the instrument. Check that the weighing platform, connectors, and limit are all normal and eliminate mechanical reasons. Check all solder joints on the wiring board again to eliminate the possibility of soldering or soldering. So it is very likely that the sensor or sensor cable is faulty. First, disconnect the sensor bus with a multimeter or shake meter to check whether there is a virtual connection or a short circuit. If the bus is intact, reset the bus. Turn off the instrument, remove the sub-bus, open the meter, and observe the meter to indicate the number of changes. If the fault phenomenon is eliminated, then the sub-bus or the connected sensor is faulty. If the sub-bus is not eliminated, the fault is eliminated. Use a multimeter or a rocker to check. Whether the sub-bus whether there is a virtual connection or short-circuit phenomenon, after inspection no problem, one by one off the sensor to determine, and ultimately find out that 3 # sensor wiring is broken to create a short circuit, the fault occurs.

Troubleshooting: Cut off the sensor signal line from the damaged part and make a joint. The truck scale will return to normal.

Example 4

Symptom: The drift of a 120t car balance zero drifts. When weighing 30 tons of heavy trucks, it is less than 2 tons compared with another scale.

Failure analysis: Through inspection, limit, scale body and other parts to eliminate the possibility of mechanical, it is estimated that the sensor performance deterioration. Weighed three points with a heavy vehicle and found that the three points of the weighing instrument had large deviations. With a 10 ton code pressure angle, we found that the largest error was in the middle of the sensor, which was only 6 tons. The other sensors were basically normal. It was estimated that the sensor was damaged due to the largest error angle. .

Troubleshooting: Replace the damaged sensor and rectify the fault.

    There are many repair methods called on the electronic platform , such as alternative methods, observation methods, pull-off methods, percussion methods, code diagnosis methods, instrument inspection methods, etc. In practice, it is often necessary to adopt several methods in a comprehensive manner. . Can not die, the key is to focus on analysis, accumulate experience, to avoid detours, quickly find out where the fault. The following examples illustrate several kinds of fault phenomena, analysis and treatment methods, hope to solve the problem of rapid maintenance of ground scales

Business Contact: Lu Qing Tel :   QQ QQ: 1739856070

Shanghai Jie Hui Electronic Technology Co., Ltd.

Company's main business: automatic unattended electronic truck scale , portable truck scale , dynamic axle weight scale , special axle weight scale for highway toll station , stainless steel scale , electronic platform scale , weighing module , electronic crane scale , electronic platform scale , explosion-proof electronic Scales , electronic platform scales , electronic balances , electronic scales , electronic crane scales , electronic forklift scales , waterproof food scales and other products