Analyze five causes of errors in load cells

The load cell is actually a device that converts the quality signal into a measurable electrical signal output. When using a sensor, we must first consider the actual working environment where the sensor is located. This is very important for the correct selection of the load cell. It is related to the normal operation of the sensor, its safety and service life, and the reliability and safety of the entire weighing instrument. Sex. In the basic concepts and evaluation methods of the main technical indicators of load cells, there are qualitative differences between the old and new national standards.

Then the load cell will inevitably produce errors in use, and what types of errors will the load cell have? What causes the error?

1. Application error of load cell.

Errors caused by operation, including incorrect placement of probes, incorrect insulation between the probe and the measuring location, errors in the purification process of air or other gases, incorrect placement of transmitters, and other operating errors. Error.

2. Characteristic error.

It is caused by the device itself, including the DC drift value, incorrect slope or non-linear slope. After all, there will be a gap between the ideal transfer function characteristics of the device and the real characteristics.

3. Dynamic error.

Sensors suitable for static conditions will have strong damping, so the response to changes in input parameters is slow, and it may even take several seconds to respond to a step change in temperature. Some load cells with delay characteristics will produce dynamic errors in response to rapid changes. Response time, amplitude distortion, and phase distortion all cause dynamic errors.

4. Insertion error.

It is the error caused by changing the measurement parameters when a sensor is inserted into the system. Using a transmitter that is too large for the system, the dynamic characteristics of the system is too slow, and the self-heating in the system loads too much heat, etc., will cause insertion errors.

 5. Environmental error.

The use of load cells will also be affected by the environment such as temperature, swing, vibration, altitude, chemical substance volatilization, etc. These factors are very easy to cause environment