1、 Pre operation inspection

1. Appearance and structural inspection
   • Check whether the scale body, hook, connecting ring and other components are intact, without cracks, deformation or severe wear.
   • Confirm whether the hook opening is flexible and the locking device is reliable to prevent detachment during the weighing process.
   • Check whether key components such as sensors and cables are loose or damaged to avoid signal interference or short circuits.
2. Environmental adaptability inspection
   • temperature rangeEnsure that the operating environment temperature is within the specified range of the scale body (such as -10 ℃~40 ℃),harshTemperature may affect sensor accuracy.
   • humidity controlAvoid using in damp or corrosive environments to prevent circuit boards from getting damp or metal parts from rusting.
   • electromagnetic interferenceStay away from strong magnetic fields, high-voltage lines, or large motors to prevent signal distortion or data errors.
3. Calibration and preheating
   • After use or long-term idle, it is necessary to calibrate according to the instructions (such as weight calibration or automatic calibration).
   • Preheat the sensor for 5-10 minutes after startup to ensure stable operation and ensure weighing accuracy.

2、 Safety regulations in use

1. Load limit
   • Overloading is strictly prohibited, and the maximum load should not exceed 90% of the nominal range of the scale body (such as a 5-ton scale weighing a maximum of 4.5 tons).
   • Avoid unbalanced loading (the center of gravity of the goods deviates from the center of the scale), and prevent uneven force on the sensor from causing damage.
2. Lifting and moving
   • Before lifting, confirm that the goods are securely tied and the hook is stably connected to the goods to prevent slipping or tilting.
   • Maintain stability during movement, avoid violent shaking or emergency stop, and prevent damage to the scale body due to impact.
   • It is prohibited to adjust the position of the goods or perform other operations while weighing.
3. Dynamic weighing limit
   • The wireless hook scale needs to read data in a stationary state, and dynamic weighing (such as when the crane is moving) may cause errors.
   • The wired hook scale needs to ensure that the cable is not pulled, to avoid signal interruption or cable breakage.

3、 Maintenance and upkeep

1. Daily cleaning
   • Clean the dust, oil stains, or corrosive substances on the surface of the scale body in a timely manner after use to prevent damage to the sensor or housing.
   • Avoid scratching the scale body with sharp tools to prevent scratches from affecting its waterproof performance.
2. Battery Management
   • The wireless hook scale needs to regularly check the battery level and replace it in a timely manner when the battery is low (such as lithium batteries or dry batteries).
   • Remove the battery during long-term storage to prevent leakage and corrosion of the circuit.
3. Sensor protection
   • Avoid strong impacts on the scale body (such as falls or collisions) and prevent damage to the internal components of the sensor.
   • Regularly check whether the sensor connection wire is loose to ensure stable signal transmission.
4. Storage conditions
   • When idle for a long time, store the scale body in a dry and ventilated environment to avoid moisture or high temperatures.
   • The hook should be hung vertically to prevent deformation or locking device jamming.

4、 Safety protection measures

1. personal protection
   • Operators need to wear protective equipment such as safety helmets, anti slip shoes, gloves, etc. to prevent objects from falling and injuring people during the lifting process.
   • Do not stand or walk under the scale, maintain a safe distance.
2. Fall prevention design
   • Use anti unhooking devices or safety locks to prevent the hook from accidentally opening.
   • Regularly inspect the wear and tear of lifting tools such as wire ropes and chains, and replace aging components in a timely manner.
3. emergency response
   • Develop an emergency plan to immediately stop operations and investigate the cause if any abnormalities occur during the weighing process, such as overload alarms or data fluctuations.
   • Equipped with spare scales or manual weighing tools to prevent work interruption caused by main equipment failure.

5、 Compliance and Records

1. Metrological verification
   • Regularly send the scale for inspection to the legal metrology institution to ensure that the scale body meets the national metrology standards (such as calibration every six months or one year).
   • Retain the calibration certificate as the basis for the legal use of the equipment.
2. Operation log
   • Record the data, time, operator and other information of each weighing for easy traceability and problem investigation.
   • Annotate and analyze the reasons for abnormal weighing results (such as data jumps and poor repeatability).
3. Training and Qualification
   • Operators need to undergo professional training, familiarize themselves with the structure of the scale, operating procedures, and safety regulations.
   • Unauthorized personnel are prohibited from operating or repairing the scale body.

6、 Common problem handling

1. Unstable data
   • Check for electromagnetic interference and keep away from equipment such as frequency converters and welding machines.
   • Confirm whether the scale body is level, adjust the lifting angle to make the center of gravity of the goods coincide with the center of the scale body.
2. Unable to turn on or display abnormally
   • Check the battery level or power connection, replace the battery or repair the power cord.
   • Restart the scale body and recalibrate. If the problem persists, contact after-sales maintenance.
3. Error exceeds the standard
   • Re calibrate the weights and check if the sensor is aging or damaged.
   • Confirm whether the scale body is impacted by external forces and replace key components if necessary.