HD-LU vortex flowmeter in the whole process of use will occur a variety of common faults, it is a difficult point often encountered by the owner, at first the business will review the internal basic parameters of the steam flowmeter, after the basic parameters are clear, the following more detailed methods can be checked, until the existence of deficiencies.
1. The basic concept of the impact measurement method is to release the interference signal to the power supply circuit, observe the embodiment of the power supply circuit, and thus identify the location of the common fault power supply circuit. For workers with a variety of work experience in maintenance, this method is more convenient, fast and effective.
2. The electronic device substitution method does not need to change the power supply circuit of the HD-LU vortex flowmeter, disassemble some electronic devices that are very likely to be damaged, and observe whether the common fault conditions dissipate after disassembly, but in the maintenance of the HD-LU vortex flowmeter. There is no need to disassemble the instrumentation equipment in the power supply circuit, and it is necessary to temporarily replace the questionable part of the HD-LU vortex flowmeter with electronic devices or printed circuit boards of the same model and specification, which is conducive to observing its damage to common fault conditions. If the common fault condition disappears, it indicates that there is a common fault in the part being replaced. This method is a more practical way for professional and technical personnel in the field technology at present.
3. The working standard voltage measurement method is to use digital multimeters and other mechanical equipment to check whether everything is normal in each electronic device inside the HD-LU vortex flowmeter, which is the basic way to retrieve the common fault causes. Overhaul the HD-LU vortex flow meter. It is important to accurately measure whether the working center of each electronic device on the relevant electronic circuit is working at the center of the circle and whether the standard voltage is normalThe resistance measurement method overhauls the HD-LU vortex flow meter, which can find the pin or drag contact point of electronic components, the resistance value, and the damage of the power capacitor, etc., and can quickly find the location of common faults.
4. Immediate observation is to immediately observe the status of the power main switch, knob, detection camera, wiring, jack and other electronic devices on the power supply circuit of the HD-LU vortex flowmeter, and then open the shell cover plate of the HD-LU vortex flowmeter, observe the internal circuits, and properly deal with the leakage and steam cracking of the stabilizer tube, the opening and welding of electronic devices, the liquid leakage of low-voltage capacitors, and the burning of transformers. Problems such as transistor pole breakage can not only eliminate some common faults, but also avoid the cause of some common faults, so the method of unplugged observation cannot be ignored.
5. The observation wave pattern method is to use an analog oscilloscope to observe the working standard voltage wave type of the HD-LU vortex flowmeter, carefully observe the appearance of the wave type, and compare it with all normal wave types, so as to find out common faults. Electronic devices can also be used to simulate the oscilloscope, from the signal input end, observe the waveform and amplitude of the input and output signals of the variometer, and identify the shortcomings of the HD-LU vortex flowmeter according to the basic parameters obtained.