As the core equipment of industrial weighing, electronic truck scales are widely used in logistics, warehousing, mining, ports and other fields. Their accuracy and stability are directly related to production efficiency and trade fairness. To ensure the long-term reliable operation of the equipment, scientific maintenance should be carried out from various aspects such as daily maintenance, regular inspection, environmental management, and operating standards. The following elaborates on the key points of maintenance from ten dimensions:

1、 Daily basic maintenance

1. Cleaning and dust removal

Clean the debris, dust, and accumulated water on the surface of the scale platform daily to avoid foreign objects getting stuck in the gaps of the scale body and causing weighing errors.

Regularly clean key components such as sensors and junction boxes, use a soft bristled brush or vacuum cleaner to remove dust, and prevent short circuits or signal interference.

During the rainy season, it is necessary to promptly remove accumulated water from the scale body, check if the drainage channels are unobstructed, and avoid long-term dampness that may cause corrosion.

2. Visual inspection

Observe daily whether the scale platform is deformed or cracked, whether the limit device is loose, and whether the sensor housing is damaged or leaking.

Check if the cables inside the junction box are damaged or oxidized, and if the wiring terminals are securely fastened to prevent poor contact from causing abnormal signals.

3. Simple calibration

Before each use, a standard weight or vehicle static compaction test is conducted to verify the zero point and weighing accuracy of the empty load, and any deviations are promptly adjusted.

2、 Periodic professional maintenance

1. Monthly inspection

Check if the bolts connecting the scale platform and sensor are loose, tighten them again, and apply rust proof oil.

Test the stability of the sensor output signal, use a multimeter to measure the excitation voltage and feedback millivolt value, and determine if the performance is normal.

Clean up the debris under the scale body and check whether the supporting structures (such as foundations and buffer pads) are stable.

2. Quarterly in-depth maintenance

After disconnecting the power supply, open the junction box to check the internal circuit board solder joints and replace the aging sealing ring or desiccant.

Perform load testing on sensors, simulate 50% and 100% loading of rated load, and compare data consistency.

Lubricate the moving parts of the scale body (such as limit screws, support hinges) to prevent friction loss.

3. Annual comprehensive maintenance

Disassemble the sensor as a whole, calibrate the sensitivity after cleaning, and replace aging seals or fatigue components.

Check the overall structural strength of the weighing platform, repair local deformations, and recalibrate the measuring parameters if necessary.

Update the instrument software version to ensure compatibility with the latest measurement standards.

3、 Environmental Control and Protection

1. Moisture and rust prevention

Install sunshades or rain covers to avoid direct sunlight or rainwater erosion, and regularly spray anti-corrosion paint in coastal areas.

Wrap the sensor connector with waterproof tape and place silicone desiccant inside the junction box.

2. Lightning protection grounding

Equipped with a dedicated lightning protection device, with a grounding resistance of ≤ 4 Ω. Cut off the power and unplug the sensor plug before thunderstorms.

Regularly check the stability of grounding piles to avoid poor conductivity caused by oxidation.

3. Temperature adaptability

Weather resistant sensors (40 ℃~80 ℃) should be selected for special temperature difference environments, and forced loading is prohibited when the scale body freezes in winter.

Install ventilation and heat dissipation equipment in high-temperature areas to prevent instruments from overheating and crashing.

4、 Operation standard management

1. Load control

Overloading is strictly prohibited. When weighing dynamic vehicles, the speed should be ≤ 5km/h to avoid damage to the sensor caused by impact loads.

Heavy vehicles need to be equipped with speed bumps in front and behind the weighing platform to distribute pressure and reduce vibration.

2. Electrical safety

During power outage maintenance, the main power supply must be disconnected and warning signs must be hung to prevent accidental electric shock.

Instrument parameter settings need to be operated by authorized personnel to avoid unauthorized changes by non professionals.

3. Data backup

Regularly export weighing data to local storage or cloud to prevent data loss caused by system failures.

Calibration records and maintenance logs must be archived for at least 5 years for traceability and auditing purposes.

5、 Common fault emergency handling

1. Inaccurate weighing

Check if the sensor is damp or damaged, and recalibrate the zero point and range.

Check for short circuits or poor contacts in the wiring inside the junction box, and replace the faulty cables.

2. Abnormal instrument display

If there is still no signal after reinstalling the meter, check the power module or sensor supply voltage.

When the LCD screen is black or garbled, try restoring the factory settings or updating the firmware.

3. 通信故障

Check if the RS485/USB interface is loose, unplug or replace the data cable.

Network instruments need to confirm that the IP address configuration is correct and that the firewall is not blocking the port.

6、 Personnel training and responsibility implementation

1. Operation training

Regularly organize operators to learn about equipment principles, daily maintenance procedures, and fault identification methods.

Explicitly prohibit behaviors such as hammering the scale body or rinsing electrical components with water.

2. Division of Responsibilities

Establish dedicated maintenance positions, develop inspection checklists, and sign and confirm.

Establish a reward and punishment mechanism to link the equipment integrity rate with performance evaluation.

7、 Spare parts management and upgrading transformation

1. Spare parts reserve

Reserve vulnerable parts (such as sensors, junction boxes, fuses) to ensure model matching.

Eliminate the parts that have been discontinued by the original factory and gradually replace them with modular universal parts.

2. Technological upgrade

Upgrade the weighing accuracy level according to the new national standard (such as OIML R76).

Introducing new technologies such as digital sensors and unmanned systems to improve efficiency.