Commonly used instrument commissioning and maintenance methods

Methods for debugging and maintenance of commonly used instruments. Commonly used instruments will also have certain malfunctions during use, which will cause the commonly used instrument products to be unable to be used normally. So how should the maintenance of analytical instruments be carried out at this time? 1. Observation method The method of observing and finding faults through human eyes is called observation method. This method is mainly used to check the deterioration and damage of parts, missing soldering of circuit boards, false soldering, short circuits between lines, broken wires and incorrect soldering of components. 2. The touch method uses human fingers or other parts to touch the mold components to find out whether the components are overheated or should be hot but not hot (such as power transformers and electron tubes should be hot), thereby indirectly judging The method of locating the faulty part is called touch and teach method. 3. Static measurement method This mainly uses a multimeter to measure the DC operating voltage and phase current in the line to determine the fault. Delay is a commonly used method for troubleshooting, and it is especially important for testing linear circuits. 4. Dynamic observation method: The method of observing the waveform of relevant points through the indicator to find the fault phase and eliminate the fault is called the dynamic observation method. 5. Tracking method: The method of finding some clues in the process of searching for faults and following the clues is called the tracking method. 6. Segmentation method: In the process of finding the fault, the method of gradually narrowing down the scope of the fault by unplugging part of the bracket, unplugging part of the circuit board or disconnecting the circuit board, and then isolating the fault point is called the segmentation method. . 7. Replacement method: The method of replacing electrical wires, circuit boards, electron tubes or other components to determine whether the fault is in a certain range is called the replacement method. 8. Simulation method. In the process of searching for faults, the method of determining the fault can be determined by comparing the obtained data by testing the same points of the * instrument and the fault instrument respectively. This method is called the simulation method. 9. In the process of searching for faults by heuristic method, if after measurement and analysis, several reasons can cause this kind of fault, then at this time, you can try to use one method to eliminate the fault. If it is invalid, then use another method. This method is called heuristic to troubleshoot. 10. Local heating method If the instrument malfunctions due to increased humidity, it is usually eliminated by local heating. For example, one of the instruments cannot work normally when the temperature is 40°C, but it can work normally again after the temperature is lowered. This team can restore the instrument to normal temperature and use an electric hair dryer or electric soldering iron to partially expose it to find the fault. This is called the local heating method. The above methods are just some common methods used in debugging or repairing common instruments. They are not isolated from each other in actual application. Sometimes it is necessary to use several methods in an interleaved manner and conduct a comprehensive analysis of the test results to make a correct judgment.