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If the instrument fails, as you can easily find:
1. Replacement method
requires two sets of the same model The instrument or have enough spare parts. Replace a good part with the same component on the faulty machine to see if the fault is resolved.
2. Method of elimination
The so-called method of elimination consists in judging the cause of the error by plugging and inserting some plug-in cards and devices into the machine. If the instrument returns to normal after a specific plug-in card or device is unplugged, it means that the error occurred there.
4. Isolation method
Fault isolation method There is no need to compare devices or spare parts of the same model, and it is safe and reliable. According to the fault detection flowchart, segmentation and circling gradually narrow the fault finding range, and then work together with signal comparison, component replacement and other methods, generally finding the fault quickly.
5. Heating and cooling method
Sometimes , the meter works for a long time, or when the temperature of the working environment is high in summer, an error occurs. It is normal to turn off and check the device.It is normal if it stops for a while and then restarts.Error.This phenomenon is due to the poor performance of individual ICs or components, and the high-temperature characteristic parameters can not meet the index requirements To find out the cause of failure, the heating and cooling method can be used.
So-called cooling means that when a failure occurs, you use anhydrous alcohol to wipe anhydrous alcohol on the possibly failed part to cool it and observe whether the error is resolved.The so-called temperature increase consists in artificially increasing the ambient temperature, for example, by bringing an electric soldering iron close byproper parts (be careful not to raise the temperature too high to damage normal equipment) to see if the error occurs.
