How to perform daily maintenance on electronic truck scales?
How to perform daily maintenance on electronic truck scales? Here are practical recommendations from Fujian Fangda Weighbridge manufacturer.
In logistics parks, mining sites, and commercial concrete mixing stations, weighbridges (electronic truck scales) operate nonstop almost daily. While robust equipment quality is essential, inadequate maintenance can lead to issues like zero drift and data instability even in top-tier systems. With over two decades of experience in the weighing equipment industry, Fujian Fangda Weighbridge has worked with numerous clients. Today, we'll explore key maintenance points from practical usage perspectives for your reference.
1. Cleaning of the weighing platform and surrounding areas:
The scale platform is exposed daily, making it susceptible to accumulation of mud, gravel, and even oil contaminants brought in by truck tires. These substances can easily accumulate in the gaps around the platform and its surroundings. Excessive buildup may lead to uneven force distribution on the scale body, and in severe cases, may even press against the platform's limit switches, impairing the normal reset function of sensors.
We recommend that on-site personnel use brooms or high-pressure air guns to clean the scale surface of floating dust during daily shift handovers. Regular inspection of drainage ditches on both sides is essential, particularly during rainy seasons, as water accumulation seeping into junction boxes or sensor cable connections can lead to significant issues. If hard stone blocks become lodged in the gaps of the scale platform, they should be promptly removed to prevent prolonged stress that may cause deformation of the scale edges.
2. Regular Inspection of Scale Structure and Connectors:
The weighbridge is subjected to daily pressure from heavy vehicles weighing dozens of tons, which can lead to fatigue in metal structures. Allocate time monthly or quarterly to inspect the foundation pit for visible corrosion, welding delamination, or cracks on the scale body. Particular attention should be paid to stress-concentrated areas such as the welding joints between U-shaped beams and end plates, as well as the vicinity of sensor mounting bases.
Special attention should be paid to the clearance between sensor connecting rods and limit bolts. Insufficient clearance may cause the scale body to become trapped due to thermal expansion and contraction under temperature fluctuations, while excessive clearance can lead to severe shaking of the weighing platform during vehicle passage, resulting in prolonged data instability. Fujian Fangda Weighing Instruments factory-installs the limit clearance within optimal parameters. However, prolonged use may require fine-tuning due to foundation settlement effects. We recommend consulting the manufacturer's after-sales service for adjustments rather than attempting unauthorized bolt modifications.
3. Waterproof and Moisture-Resistant Design of Sensors and Junction Boxes: Regardless of the protection rating of sensors, prolonged immersion remains a concern. In some older weighbridge foundation pits with inadequate drainage systems, sensors become submerged during flood seasons, leading to zero drift and insulation degradation over time. It is essential to maintain pit dryness under normal conditions, and installing an automatic drainage pump is recommended when feasible.
Regularly inspect the terminal blocks inside the junction box for signs of moisture-induced green discoloration or loose screws. Use a hairdryer's cold setting to remove dust particles, verify the integrity of sealing gaskets before resealing. For self-installation challenges, contact the manufacturer for remote technical support. Fujian Fangda Weighing Equipment Co., Ltd. provides periodic inspection reminders to long-term clients.
4Lightning Protection Grounding Must Not Be Neglected. Southern regions experience frequent thunderstorms, and since weighbridges are outdoor metal structures, inadequate lightning protection grounding can lead to instrument damage or even sensor breakdown when struck by lightning. Inspect grounding piles for rust or loosening, and it is recommended to measure grounding resistance annually before the thunderstorm season. For open areas, installing independent lightning rods is a common protective measure.
5. Operational Habits Equally Affect Service Life Even the most advanced weighbridge cannot withstand reckless driving. Heavy vehicles must be loaded and unloaded at a constant low speed, with strict prohibition of sudden braking or abrupt steering on the weighing platform, as lateral impact forces can cause significant damage to sensors. During weighing operations, vehicles should be positioned as centrally as possible on the platform to avoid prolonged uneven loading that may lead to sensor stress distribution imbalances.
Additionally, vehicles exceeding the rated load capacity of the weighbridge must not be allowed to proceed. Some drivers believe that slight overloading is harmless and may not cause issues after one or two instances. However, metal fatigue is cumulative, and remedial measures become costly only when permanent deformation of the weighing bridge structure occurs.
In summary, maintaining weighbridge systems isn't inherently difficult—the key lies in establishing consistent daily inspection routines. A properly maintained electronic truck scale can maintain stable accuracy for seven to eight years or even longer, as evidenced by the equipment of many long-term clients at Fangda Weighbridge Equipment. When uncertain whether certain anomalies indicate potential failures, immediate communication with manufacturers is essential. Sometimes, a single on-site photograph or short video clip can help technicians make preliminary assessments, which proves far more effective than letting minor issues escalate into major problems.
