What should I do if the digital dynamometer fails?
The dynamometer is used more and more widely in life. It is generally considered as a digital dynamometer. It can be said to be a mechanical dynamometer. The dynamometer is applicable to electronic appliances, light industrial textiles, and architectural hardware. , lighters and ignition devices, fire equipment, pens, locks, fishing gear, power machinery, scientific research institutions and other industries push-pull load testing and so on. The use of such a wide range of dynamometers will inevitably lead to failures. How to eliminate the simple faults of these dynamometers? The following is a brief explanation.
1, knocking hand pressure method
It is often the case that the dynamometer is operating in good or bad condition. The vast majority of this phenomenon is due to poor contact or welding. For this situation, tapping and hand pressure can be used. The so-called "knocking" is to lightly hit the board or component with a small rubber hoe or other knocker to see if it will cause an error or stop failure. The so-called "hand pressure" is when the fault occurs, after the power is turned off, the plugged parts and the plug and the seat are re-pressed firmly by hand, and if the power supply is turned on, it will eliminate the fault. If you find that the cabinet is normal, and then you are not normal, then you should try to re-insert all the connectors and try again. If you are unsuccessful, you have to find another solution.
2, observation method
Uses sight, smell, touch. In some cases, the damaged components will discolor, blistering, or burn spots; burned devices will produce some special odors; short-circuited chips will become hot; visible or unwelded areas can also be observed with the naked eye. .
3, elimination method
The so-called exclusion method is to determine the cause of the fault by inserting and removing some plug-in boards and devices. When the dynamometer returns to normal after removing a certain board or device, it indicates that the fault occurred.
4, replacement method
Two dynamometers of the same type or sufficient spare parts are required. Replace a good spare with the same component on the faulty machine and see if the fault is eliminated.
5. Comparison method
Two dynamometers of the same type are required and one is operational. Use this method must also have the necessary equipment, for example, digital dynamometer, oscilloscope and so on. According to the nature of comparison, there are voltage comparison, waveform comparison, static impedance comparison, output comparison, and current comparison. The specific method is: let the faulty dynamometer and the normal dynamometer run under the same conditions, and then detect the signals of some points and then compare the measured two signals. If there are differences, you can conclude that the fault is out here. This method requires maintenance personnel with considerable knowledge and skills.
6, lift the temperature method
Sometimes, the dynamometer will work for a long time, or it will malfunction when the working environment temperature is high in the summer. The shutdown check is normal, and after a while, it is normal and after a while, it will malfunction again. This phenomenon is due to the poor performance of individual ICs or components, and the high temperature characteristic parameters do not meet the requirements of the specifications. In order to find out the cause of the fault, it is possible to use the heating and cooling method. The so-called cooling, that is, in the event of a failure, the use of cotton fiber will be wiped in the area of ​​possible failure of the alcohol to make it cool, observe whether the failure is eliminated. The so-called warming is artificially raising the temperature of the environment, such as using a soldering iron near the point of doubt (note that the temperature must not rise too high so as to damage the normal device) to see if the fault appears.
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