Q&A

Installation steps

1) After opening the package, check whether the range of the sensor is consistent with the package, whether the appearance has deformation or other bad phenomena caused by transportation.(Minor scratches or color error in appearance is a normal phenomenon in the production process and does not affect the normal use of the sensor)

2) Fix according to the corresponding installation method of the product, check whether the sensor is installed correctly, and test according to the correct voltage and range.

Notes and instructions

1) Untrained personnel are not allowed to operate, clean, check, maintain, repair or modify the equipment. Be sure to disconnect the equipment before cleaning or performing maintenance.

Only qualified personnel are allowed to repair the equipment. Be careful during power checking, testing and adjustment. Failure to comply with the above precautions can cause personal injury.

2) When welding the scale, please put the grounding wire clip to prevent the welding current from transmitting to you through the weighing sensor. Please make the welding equipment as close to the working ground as possible. Do not weld within 4 feet (1.2 m) of the weighing sensor without its removal.

3) Common faults occurring on the site

Q1:The display data is unstable and jumping during no-load or weighing process.

After the sensor, junction box and meter are disconnected from the power supply, re-power them up to see if they automatically return to normal.

Q2:Zero drift

Check whether the cable between the sensor and the junction box and meter is broken or damaged, and reconnect the connector if it is connected with the connector.

Q3:No display after loading

Check whether the power supply is stable and whether the power supply voltage is normal.

Q4:The display data is too big when no load.

When using multiple load cells, check whether each load cell is in contact with the loaded object.

Q5:The display data does not return to zero after weighing.

The green and white output wires of the load cell are disconnected from the junction box or meter; use a multimeter to measure the mV value. The junction box or meter needs to keep power supply. From the measured mV value to determine whether it is a sensor failure.

Q6:Large weighing error

Cut off the power supply, disconnect the sensor input and output lines (four-core cable) from the junction box or meter; use a multimeter to measure the resistance value of input (red, black) and output (green, white), no resistance value can be directly judged as a fault of this sensor, and judge whether the resistance value is normal against the certificate or manual.

 

Use the working environment

General corrosion protection situation, radio frequency interference, lightning strike and electrostatic phenomenon. The operating temperature of the operating environment is-20℃ ~ + 70℃.

Safety precautions

1) The input voltage is at 5V~12V, if below 5V may lead to abnormal output, and if higher than 12V may damage the sensor.

2) A strong impact force at the loading end may cause permanent damage to the sensor.

3) Mechanical collision and friction may lead to reducing the measurement accuracy and service life of the sensor.

4) The disassembled sensors may not receive a good warranty.

Corporate Responsibility

We focus on continued profitable growth which allows us to invest in our business, employees and customer service. Since our establishment many years ago, we have a long-term vision and strategy at the heart of everything that we do as a business.

Continued high levels of investment – in excess of 10% of annual sales revenues – is used to drive innovation and new product development. Increasingly, more of our products and solutions are used by clients in a diverse range of industries to increase machine and process efficiencies and to enhance the health and safety of equipment.

We operate in countries across the world and ensure all of our employees uphold and benefit from our values.

Quality Control

Whatever your needs, you can rely on us here at QL Sensor to provide you with the best in quality and precision. We guarantee high performance through our passion, dedication and full compliance with international standards.

We have ISO 9001 certification for quality management systems. This reflects our commitment to provide a consistent service that exceeds our customers’ expectations.

Our CE NTS certification is a quality management system for the design and manufacture of medical devices. This makes us an ideal partner for providing solutions within the medical industry.

How We Can Help

Our in-house work includes metallurgy, stress analysis, metrology, process engineering, industrial design, electronics, and software. Such a diverse skill set ideally places us to tackle any custom solution you might need.

We can take care of all the steps involved in bringing your custom solution to fruition. This includes the sensor, hardware, electronic and software development, verification and validation processes.

We will tailor the manufacturing process of our custom load cells to suit your demand. We can provide low-volume specialist work, yet quickly scale up to high-volume output via dedicated work cells.

We also offer technical support for clients inexperienced with weight and force measurement technology. We will work in conjunction with your engineering team to advise and instruct.

Certificate