Weighing instrument load cell maintenance precautions

Abstract: The information on the maintenance precautions of the load cell of the weighing instrument is provided by the excellent manufacturers of flow meters and flow meters. The weighing instruments used belong to the category of precision instruments. Installation, use and maintenance must be done according to the requirements in the manual to ensure the safety, normality and accuracy of the instrument. Otherwise, the meter may be damaged or its service life may be shortened. say. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The weighing instruments used belong to the category of precision instruments. Installation, use and maintenance must be done according to the requirements in the manual to ensure the safety, normality and accuracy of the instrument. Otherwise, the meter may be damaged or its service life may be shortened. The following points should be noted in the use and maintenance of the load cell of the weighing instrument; 1. Installation: Generally, the instrument should be placed in a clean, dry, ventilated and suitable temperature environment. The position of the instrument should be fixed and do not move frequently, otherwise it may cause the internal lead of the signal cable plug to fall off and cause malfunction. 2. Power supply: Most of the weighing instruments use 220V AC power supply, and the allowable voltage range is generally 187V---242V. After changing the power line, remember to measure whether the voltage meets the requirements before powering on the instrument. Failure to apply 380 volts to the meter by mistake may cause damage. In the occasions where the power supply voltage fluctuates greatly, a voltage stabilizer with good performance (such as CW type AC parameter voltage stabilizer) should be equipped to ensure the normal use of the instrument. Do not use the same power socket with strong interference sources (such as electric motors, electric bells, fluorescent lamps), so as to avoid unstable instrument display values. Some instruments (such as HAWK meters, etc.) are used for both AC and DC. When using dry batteries, it should be noted that battery leakage will damage the instrument. When the battery is not used for a long time, the battery should be removed. 3. Grounding: The weighing instrument should be connected to an independent and good grounding wire (the grounding resistance is less than 4 ohms, and the grounding lead should be as short as possible). The ground wire has dual functions: it not only protects the operator's personal safety, but also has an important anti-interference effect, which can ensure the stable operation of the instrument. The ground wire is connected to the power socket of the instrument. If the ground wire of the instrument is connected to a public strong This may cause power interference to the instrument and cause the instrument display value to fluctuate. The ground connection point should be checked regularly for good contact. Because after a long time, the connection points will be oxidized, rusted, etc., which will make the instrument practically ineffective. 4. Sun protection: Avoid direct sunlight on the black shell of the meter, otherwise the meter may be damaged beyond the rated temperature range. 5. Waterproof: Under normal circumstances, although the humidity of the working environment of the instrument can reach 95%, it is stipulated that no condensation can occur. The exception is the special stainless steel housing instrument with waterproof function. 6. Anti-corrosion: Corrosive substances cannot penetrate into the inside of the instrument, otherwise it will corrode the components on the circuit board and the circuit board itself, and the instrument may be scrapped for a long time. Even a meter with anti-corrosion function will have the same result if the sealing is not tight. 7. Lightning protection: The electronic weighing apparatus is a weak current system, which is easily attacked by lightning and damaged components. Lightning mainly enters the instrument from two aspects: imported from the power line and imported from the weighing platform through the signal cable. In normal weather, the operator only needs to operate the power switch, but in the case of a short-range lightning strike, the power plug of the instrument and the plug of the weighing platform signal cable must be unplugged. It is best to take anti-lightning measures, such as adding anti-surge protectors to the power circuit of the instrument. 8. Anti-strong electricity: the live wire of the power supply above 220 volts accidentally hits the scale platform or uses the scale platform as the ground wire, and the electric welding operation on the scale platform may damage the instrument. 9. Cleaning: In an industrial environment, there will be dust accumulation or contamination on the case of the instrument, which must be cleaned with a damp cloth frequently when the power is off. But be careful not to wipe the display window with solvents such as alcohol, which will deteriorate the light transmission performance and make the display blurry. 10. Anti-static: Once the instrument is damaged, it must be sent for repair. In order to speed up the transfer back and forth, some units like to remove the PCB board of the instrument and send it by express mail, which causes an anti-static problem. When taking the PCB board, hold the four corners of the board, and do not touch the place with the integrated block pins. Because it is easy to damage the integrated block by static electricity. The removed PCB board should be put into a shielding bag immediately, and can be wrapped with ordinary newspaper if there is no shielding bag. If the board is placed on a high-insulation desktop, it may damage the PCB board. When you receive the repaired PCB board and need to re-install the instrument, you should also pay attention to anti-static. 11. Anti-vibration: When transporting the instrument, it is best to put it in the original packing box, or take appropriate anti-vibration measures. 12. Explosion-proof: If the instrument is used in a composite or intrinsically safe explosion-proof system,The relevant regulations on explosion protection should be followed. 13. Responsibilities: Electronic weighing apparatus is a relatively advanced weighing system, which should be operated and maintained by trained personnel. At present, most weighing instruments determine the function and performance of the weighing instrument through parameter setting and calibration on the software. Once these parameters are arbitrarily changed, it may affect the weighing accuracy and function (such as no printing or no communication, etc.). Therefore, it is also very important to determine the respective responsibilities of operators and maintenance personnel. The above is the entire content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Weighing Instrument Load Cell Maintenance Precautions'

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