What are the precautions for calibration and inspection of load cell?

Pre-calibration and regular inspection of load cells are important steps to ensure their accuracy and reliability. Here are some considerations to help you do these things better:

Precalibration considerations

Select the appropriate calibration mechanism:

Select qualified third-party calibration laboratories or calibration services provided by manufacturers to ensure the accuracy and credibility of calibration results.

Calibration institutions should have corresponding equipment and technical capabilities, and it is best to provide calibration certificates.

Preparation before calibration:

Ensure that the sensor is in a clean state and free of impurities such as dust and oil.

Check whether the sensor is firmly installed and whether the connecting wire is intact.

Record the basic information of the sensor, such as model, serial number, last calibration date, etc.

Calibration process:

Follow the calibration procedures to ensure that each step meets the standard requirements.

Use standard weights or test equipment with known accuracy for calibration.

Calibration is carried out at multiple points, covering the whole measuring range of the sensor to ensure linearity and repeatability.

Recording and analysis:

Record the readings of each point in the calibration process, including the standard reference value and the sensor output value.

Analyze calibration data, calculate errors and deviations, and judge whether the performance of the sensor meets the requirements.

If the error is found to be beyond the allowable range, the sensor needs to be further adjusted or repaired.

Matters needing attention in regular inspection

Make inspection plan:

According to the use frequency and working environment of the sensor, a reasonable inspection cycle is formulated, and it is generally recommended to conduct a comprehensive inspection at least once a year.

For sensors used in key applications or high frequency, the inspection frequency can be appropriately increased.

Visual inspection:

Check the appearance of the load cell for obvious damage, corrosion or deformation.

Check whether the connecting wires and connectors are loose or damaged.

Function check:

Under the condition of no load, check whether the zero output of the sensor is normal.

Check whether the output of the sensor is stable and the load with known weight is accurately applied,

Test the repeatability of the sensor: apply the same load for many times and observe the change of the output value.

Environmental impact:

Check the installation environment of the sensor to ensure that there is no excessive temperature, humidity or electromagnetic interference.

If the sensor is used in special environment (such as high temperature, low temperature, high humidity, etc.), special attention should be paid to its adaptability and stability.

Records and reports:

Record the results of each inspection in detail, including inspection date, inspectors, inspection items and results.

If problems are found, they should be recorded in time and corresponding measures should be taken to repair or replace them.

Regularly summarize the inspection reports, and analyze the usage and performance trends of sensors.

Maintenance and maintenance:

Clean the sensor regularly, especially the contact surface and connection parts.

Carry out necessary lubrication and maintenance according to our suggestions.

Avoid damp, high temperature and strong magnetic field when storing.

Through the above precautions, you can ensure that the load cell is always in the best working condition, thus improving the accuracy and reliability of measurement. If you have any questions or encounter complicated problems, it is recommended to contact our technicians of Kaidechang Sensing for help.