1、 Daily cleaning and dust prevention

1. Cleaning frequency
   • After daily useWipe the surface of the weighing platform with a dry soft cloth to remove dust, oil stains, or residual materials.
   • once a weekUse neutral cleaning agents (such as soapy water) to clean the weighing platform, avoiding the use of strong acids, alkalis, or organic solvents (such as gasoline, alcohol) to prevent corrosion of the sensor or housing.
   • once a monthClean the dust at the bottom of the scale body and around the sensor to prevent debris from jamming the sensor or affecting heat dissipation.
2. dustproof measures
   • In dusty environments such as flour mills and cement plants, install dust covers (such as transparent plastic covers) on the weighing platform to reduce the entry of dust.
   • Regularly check whether the sealing strip of the scale body is intact. If it is aged or damaged, it should be replaced in a timely manner to prevent dust from entering through the gaps.

2、 Regular calibration and parameter inspection

1. calibration cycle
   • Daily zeroingAfter each startup, perform a tare operation to eliminate the impact of the weight of the weighing platform.
   • Monthly calibrationUse standard weights (such as 1kg, 5kg, 10kg) to verify weighing accuracy, and adjust parameters if the error exceeds the allowable range (such as ± 0.1%).
   • Annual comprehensive calibrationEntrust a third-party metrology institution or use high-precision standards (such as M1 grade weights) for full range calibration, and issue a calibration certificate.
2. Calibration steps
   • No load calibrationClear the weighing platform, press the "Cal" or "Calibration" button to enter calibration mode, wait for the display to stabilize, and confirm the zero point.
   • Load calibrationPlace standard weights (such as 20%, 50%, and 100% of the range) in sequence, record the displayed values, and adjust the calibration coefficient until the error is within the allowable range.
   • Linear calibrationIf there is a non-linear error in the weighing platform (such as a large error at both ends of the range), multi-point linear calibration is required to ensure consistent accuracy across the entire range.
3. parameter check
   • Division value settingAdjust the division values (such as 1g, 5g, 10g) according to actual needs to avoid display fluctuations caused by too small division values or affecting accuracy due to too large division values.
   • Filter parametersAdjust the digital filtering time according to the material characteristics (such as 0.1-1 second), balance response speed and stability (such as shortening the filtering time for light and small materials).
   • Counting mode parametersIf used for counting function, it is necessary to set a reference weight for a single material (such as calculating the average value by weighing 10 samples), and regularly verify the accuracy of the reference weight.

3、 Environmental Control and Protection

1. Temperature and Humidity
   • Operating TemperatureEnsure that the ambient temperature is within the allowable range of the sensor (usually -10 ℃~+40 ℃), and avoid direct sunlight or high temperature radiation (such as near boilers and heaters).
   • humidity controlWhen the humidity is too high (such as>85% RH), use a dehumidifier or air conditioner to reduce the humidity and prevent condensation inside the sensor from causing a short circuit.
   • temperature compensationIf the ambient temperature changes significantly, it is necessary to calibrate separately at high and low temperatures and input the temperature compensation coefficient (some scales support automatic temperature compensation).
2. Anti vibration and anti impact
   • Installation locationAvoid installing the weighing platform near vibrating equipment such as motors, fans, and stamping machines. If necessary, use shock-absorbing pads or anti vibration brackets to isolate vibrations.
   • Operating SpecificationsDuring weighing, it is prohibited to strike the weighing platform or place heavy objects to prevent damage or deformation of the sensor.
   • overload protectionIt is strictly prohibited to exceed the maximum range of the weighing platform (usually 120% of the range), otherwise it may damage the sensor or structural components.
3. Corrosion and rust prevention
   • Material SelectionIn humid or corrosive environments such as chemical plants and seaside warehouses, stainless steel weighing platforms (such as 304 or 316L stainless steel) or surface galvanizing treatment should be selected.
   • coating protectionRegularly check whether the surface coating of the weighing platform is intact. If there are scratches or peeling, it is necessary to promptly apply anti rust paint or epoxy resin.
   • Dry after cleaningAfter cleaning the weighing platform, it is necessary to dry it with a dry cloth to avoid residual moisture that may cause rust.

4、 Electrical system maintenance

1. power management
   • voltage stabilityUse a regulated power supply or UPS (uninterruptible power supply) to avoid voltage fluctuations (such as>± 10%) that can damage the circuit of the weighing platform.
   • power isolationThe power supply of the weighing system needs to be separated from other power sources (such as motors and frequency converters) to prevent electromagnetic interference (EMI) from affecting the weighing signal.
   • grounding protectionEnsure that the weighing platform is well grounded (grounding resistance<4 Ω) to prevent static electricity accumulation or lightning damage to the equipment.
2. Signal line inspection
   • Shielding and groundingThe sensor signal line needs to be threaded through a metal tube or shielded cable, and grounded at one end (to avoid circulating interference caused by multiple grounding points).
   • Fasten securelyCheck the connection wires of sensors, junction boxes, and displays for looseness every month, tighten bolts, and apply rust proof oil.
   • Rat prevention measuresInstall anti rodent nets or sealing adhesive at the signal line conduit to prevent rodents from biting and causing circuit breaks.
3. battery maintenance
   • Built-in batteryIf the weighing platform is equipped with a backup battery (for power-off data storage), it needs to be charged regularly (usually every 3 months) to avoid battery damage caused by over discharge.
   • replacement cycleThe lifespan of lithium batteries is usually 3-5 years. If there is a low battery prompt (such as displaying "Lo" or "low battery"), it is necessary to replace the battery with the same model in a timely manner.

5、 Inspection of sensors and structural components

1. Sensor status
   • Visual inspectionCheck the surface of the sensor monthly for cracks, deformation, or corrosion, and replace it immediately if any problems are found.
   • Output testUse a multimeter to measure the output signal of the sensor (such as mV level voltage). If the output is unstable or the linearity is poor, the sensor needs to be recalibrated or replaced.
   • Moisture-proof treatmentIn humid environments, waterproof silicone can be applied to the surface of the sensor or a protective cover can be added to prevent moisture from entering.
2. Structural component fastening
   • Scale platform levelEvery quarter, use a spirit level to check if the weighing platform is level. If it tilts, adjust the height of the support feet to ensure that the four sensors are evenly stressed.
   • bolt tighteningCheck if the connecting bolts between the scale platform and the sensor, as well as between the sensor and the base plate, are loose. The tightening torque should comply with the instructions (e.g. M8 bolt torque is 20-25N · m).
   • limit stopIf the weighing platform is equipped with limit bolts (to prevent the platform from shifting due to overload), it is necessary to regularly check the limit clearance (usually 1-2mm) to avoid unstable weighing caused by excessive clearance.

6、 Software and Data Management

1. Firmware update
   • Regularly visit manufacturers, download the latest firmware and upgrade the scale platform program, fix known vulnerabilities or optimize features (such as adding new counting modes, improving filtering algorithms).
   • Backup the current parameter settings before upgrading to avoid data loss after the upgrade.
2. data backup
   • If the weighing platform supports data recording functions (such as weighing history and counting statistics), it is necessary to regularly export the data to a computer or cloud storage to prevent data loss due to memory saturation.
   • The recommended backup cycle is once a week, and important data can be encrypted and saved.
3. Operation permission management
   • Set administrator password to restrict ordinary users from modifying calibration parameters or system settings, to prevent weighing errors caused by misoperation.
   • Regularly change passwords to avoid password leaks.

7、 Long term idle maintenance

1. Cleaning and drying
   • Before long-term idle, clean the weighing platform and dry it of moisture to prevent rust or mold.
   • Apply rust proof oil (such as WD-40) on the surface of the weighing platform and cover it with a dust cover.
2. storage environment
   • Store the weighing platform in a dry, ventilated, and non corrosive indoor environment, avoiding direct sunlight or high temperatures (such as near a boiler room).
   • During storage, the scale platform shall be placed horizontally, and wood blocks or foam shall be padded on the four corners to prevent deformation.
3. Regularly power on
   • Power on once every 3 months (at least 2 hours each time) to drive the internal circuit for dehumidification and prevent electronic components from being damaged by moisture.

8、 Common faults and emergency response

1. Display abnormalities (such as garbled text, not lit)
   • reasonPower failure, monitor damage, motherboard malfunction.
   • processCheck if the power supply voltage is normal and replace the monitor or motherboard (requires professional operation).
2. Inaccurate weighing (such as large fluctuations or excessive weight)
   • reasonSensor looseness, calibration failure, environmental interference.
   • processTighten the sensor connection, recalibrate the scale platform, and check if it is close to the vibration source or electromagnetic field.
3. Counting function failure
   • reasonReference weight setting error, significant difference in material weight.
   • processRe weigh 10 samples to calculate the average reference weight, or switch to the "average counting" mode (suitable for materials with large weight fluctuations).