As an important measuring equipment in industrial production, the installation quality of electronic hanging scales directly affects weighing accuracy, service life, and operational safety. The scientific installation process needs to take into account mechanical balance, electrical protection, and environmental adaptation. The following provides specific explanations from four dimensions: site selection planning, mechanical assembly, electrical connection, and commissioning calibration.
1、 Site selection and foundation preparation
A comprehensive assessment of the work site is required before installation. Prioritize selecting areas away from strong electromagnetic interference sources such as large motors and transformers to avoid magnetic field fluctuations affecting sensor signal stability; If it is installed outdoors, it should avoid the position of the air outlet to prevent strong winds from causing swinging of the suspended object and resulting in reading deviation. The basic load-bearing structure must meet at least 1.5 times the rated load, and the surface of the concrete base must be polished flat with a horizontal error controlled within ± 2mm/m. For mobile installation scenarios, it is recommended to use specialized brackets with locking devices to ensure that there is no risk of displacement during operation.
2、 Precise positioning of mechanical components
The core load-bearing components (such as lifting rings and shackles) should be vertically suspended directly above the center of gravity of the object being measured. When lifting with double ropes, the tension of the two steel wire ropes should be balanced. The installation height needs to reserve sufficient space, so that the low point of the hanging scale is at least 80cm above the ground, which not only ensures the convenience of material loading and unloading, but also avoids damage to the sensor caused by bottom impact. The key nodes are made of high-strength alloy steel material, and the threaded connections must be coated with anaerobic adhesive to prevent loosening, and tightened with a torque wrench according to the specified values in the manual. Special attention should be paid to the coaxiality deviation between the lifting ear and the sensor not exceeding 0.5 °, which can be corrected with the assistance of a laser level.
3、 Electrical system specification wiring
The signal transmission line should use shielded cables with metal braided mesh. When laying through pipes, the metal hose should be reliably grounded, and the length of a single cable should not exceed 50 meters to reduce signal attenuation. Each terminal block inside the junction box must strictly distinguish between power lines (L/N), excitation voltage lines, and feedback signal lines, and the crimping sequence should follow the principle of "main first, auxiliary second". The weighing display controller should be installed in a dry and ventilated operating room, and can be quickly plugged and unplugged from the scale body through an aviation plug. A silicone rubber sealing ring should be applied to the interface to prevent moisture. The entire system needs to be equipped with an independent power supply circuit and surge protectors to cope with grid fluctuations.
4、 Multi level calibration and functional verification
Insulation resistance test (≥ 500M Ω) is required before initial power on. Perform a zero reset operation in an unloaded state and observe whether the display is stable and reset to zero; Load the standard weight to the three points of 20%, 60%, and 100% of the full range, and record the indication error after holding each level for 3 minutes. The allowable deviation range should comply with the requirements of JJG 539-2016 regulations. During dynamic testing, simulate actual working conditions by repeatedly lifting and lowering different weight loads, with a focus on testing the return to zero speed, repeatability error, and anti bias load capacity. After completing the basic calibration, temperature drift testing is also required to verify data stability within the range of -10 ℃ to 40 ℃.
5、 Security protection and post maintenance
After installation, a load limit sign should be posted in a prominent location, and it is strictly prohibited to use beyond the range. Daily maintenance requires monthly inspection of mechanical wear and quarterly use of a precision multimeter to measure bridge resistance values. Before the rainy season, it is important to check the sealing of the junction box. In winter, the instrument panel can be preheated appropriately in low-temperature environments. Establish equipment file cards to record in detail each calibration parameter and maintenance history, ensuring traceable management throughout the entire lifecycle.