Instruments and meters are used in various production enterprises, and are more widely used in electronic production enterprises. Many electronic products need to be tested by instruments before they leave the factory. Instruments similar to image measuring instruments detect electronic components. Instrument testing can reduce the probability of defective products and defective products, and can improve the quality of enterprise products. However, the detection of instrumentation is also very important. Taking electronics companies as examples, briefly describe several common methods of instrumentation maintenance:
The first commonly used method is to observe the instrument and use vision, smell, touch, hearing, etc. to see if the instrument has a burnt smell, spots, or noise. Generally, the burned out instrument will have a bad smell and it is easy to smell. If the chip is short-circuited, it will feel hot. The broken part can be seen with the eyes. Sometimes the abnormal noise of the machine can be heard These may be problems with the instrument.
2. Restart method
If the operation of the instrument is poor or the suspension fails, you can turn off the instrument, plug in the power switch again, or tap the faulty part of the instrument, and then restart. After restarting, see if the instrument can run normally. If it can, it indicates that there is poor contact in some parts of the instrument or poor contact from the power supply.
3. Temperature adjustment method
Due to seasonal reasons, the temperature is sometimes too high or too low, which may affect the instrument. If the instrument shuts down after a failure, restarts after a while, and then fails again after a period of normal operation. Repeated occurrence of this phenomenon may be that a certain part of the instrument cannot be used normally due to the increased temperature during work. It can be cooled with absolute alcohol. And for too low temperature can adjust the indoor working environment temperature.
The elimination method is that when the instrument fails, you can unplug some internal boards or components. If the instrument returns to normal after a certain component is unplugged, it means that the unplugged part is out of order and needs to be replaced.
5. Replacement method
If you know the faulty component of the instrument, or if you are not sure whether a component is faulty, you can see if the fault is eliminated by replacing the same new component.
If you have common and necessary equipment such as multimeters and oscilloscopes, and there are two instruments of the same model, you can perform some comparison tests. Such as waveform comparison, voltage comparison, current comparison, output result comparison and so on. Run the normal instrument and the instrument under test under the same conditions, and then measure these comparative data. If there are differences in some places, it is likely that the problem will occur here.
7. Fault flowchart method
Eliminate and narrow down the fault one by one according to the fault flowchart. You do not need to use the same model of instrument to perform the same condition detection and comparison. You can check the cause of the fault through signal comparison and component exchange.