Small metal tube float flow meter with LCD display failure how to solve
Changzhou Liangbang Instrument Development Co., Ltd. introduced a new generation of tiny metal tube floater flowmeter, which has carried out technical innovation on the basis of the original product. The introduction of foreign advanced calculation software ensures accurate calculation, medium, viscosity, density, temperature, pressure multi-level correction. The following five unique advantages have been formed: First, one-piece molding of inner and outer tapered tubes; Second, low pressure loss design; Third, the float is not easy to block, the magnetic element is not affected by the magnetic field; Fourth, the measurement tube has no dead angle; The fifth is modular, intelligent, card-type indicator design, and the new ESK transmitter synchronized with the international market.
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When on-site maintenance and inspection of the tiny metal floater flowmeter, it is often seen that the flow indication is unchanged and fixed at a certain value, and the liquid crystal table still has numerical values ​​displayed. The quick determination method is to change the position of the local remote transmission display part and the rotor part up and down to simulate the state of the float dynamic flow. In this case, the float in the metal tube is fixed and fixed. Using the magnetic principle of the float, if the follower magnet in the display is linked with the float, if the float is stuck, the pointer of the mobile display part can be normally changed and displayed, and the display part is normal. If the pointer can not be changed to find the remote display and signal power failure. The cause of the fault is the following:
1. Tiny pointer stuck
(1) Metal floater flowmeter glass panel damage Squeeze pointer stuck. The processing method is: open the display table to replace the glass panel;
(2) Vibration, when the other equipment is overhauled or the instrument is overhauled, the instrument pointer is loosely deformed so that the deformation of the pointer does not reflect the actual flow value. The method is: replace the installation adjustment with the equivalent model display.
2. Signal power failure
(1) screw loose line transmission failure;
(2) damage to the signal amplification conversion component;
(3) I/O module failure of the control station;
(4) DCS control station terminal failure.
Troubleshooting method is: using the "segmentation method" in the control room to control the station disc terminal voltage measurement DC (1-5) V, analysis and judgment is the scene of fault or control room failure, the highest failure rate is the terminal screw loose, fastening screw failure Can be ruled out. Failure can not be ruled out by looking for DCS measurement module fault according to terminal wire number, looking for module fault indicator to see if there is any fault, or replace the measurement module of the same model with “replacement method†to see if it shows normal.
Pointer jitter
(1) Slight fluctuations in pipelines and media due to unstable operating pressure;
(2) The metal float gauge pointer will fluctuate slightly due to line and medium fluctuations.
The above faults can be contacted with the control room to find the operation reason, adjust the stable pressure of the process parameters, temperature flow, increase the damping of the metal float meter, and improve the process environment to stabilize the flow meter.
Changzhou Liangbang has been devoted to the R&D and production of flow meters and level meters for more than a decade since its establishment. Over the years, we have sold not only products, but also services and quality, focusing on the feelings of customers. Experience, truly from the perspective of customers, and strive to achieve the perfect pre-sale sales and after-sales service! 
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