How to detect compressed air flowmeter? What are the detection methods?
2021-06-08
When there is a problem in the work of the compressed air flow meter, it is necessary to stop working, detect the product, and find out the root cause of the problem in order to operate the correct maintenance method.
Detection method of compressed air flowmeter:
1.tapping hand press method,
Often encounter the phenomenon of good or bad operation of the instrument, which is mostly caused by poor contact or virtual welding. In this case, tapping and hand pressing can be used.
The so-called "tapping" is to gently tap the plug-in board or part through a small rubber 𨱠head or other percussion objects to see if it will cause errors or stop The so-called "hand pressure" is that when the fault occurs, after turning off the power, the inserted parts and plugs and seats are re-pressed by hand, and then the machine is turned on to try whether it will eliminate the fault. If it is found that knocking the casing is normal, and then knocking it is not normal, it is best to re-insert all the joints and try again, if the nerve-wracking is not successful, we have to find another way.
2. Method of observation
Use sight, smell and touch. In some cases, damaged components may become discolored, blistered, or charred; Burned-out devices produce some peculiar odors; Short-circuited chips get hot; It is also possible to see the spot where the weld is faulty or unwelded with the naked eye.
3. Elimination method
The so-called elimination method is a method to determine the cause of the fault by some plug-in boards and devices in the plug-in machine. When the meter returns to normal after removing a board or device, it indicates that the fault occurred there.
4. Substitution method
Two instruments of the same model or sufficient spare parts are required. Replace a good spare with the same component on the faulty machine to see if the fault is eliminated.
5. Contrast method
It is required to have two instruments of the same model, and one is in normal operation. The use of this method also has the necessary equipment, such as multimeters, oscilloscopes, etc. According to the nature of comparison, there are voltage comparison, waveform comparison, static impedance comparison, output result comparison, current comparison and so on.
The specific method is: let the faulty instrument and the normal instrument operate in the same situation, and then detect the signal of some points and compare the two groups of signals measured, if there is a difference, you can determine that the fault is here. This method requires the maintenance personnel to have considerable knowledge and skills.
The above is Aister editer introduction to the detection method of compressed air flowmeter. I hope you can better understand it after reading it.
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