Cause Analysis of Common Errors of Weighing Sensors

Weighing sensor is a kind of electrical signal output device which can convert mass signal into measurable signal. Weighing sensor will inevitably produce errors in use. What are the causes of errors in our daily life? The following is an introduction to the analysis of common errors of weighing sensors.

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

Application error of weighing sensor: It is also caused by operation error, including misplacement of probe, incorrect insulation between probe and measuring site, misplacement of air or other gas purification process, misplacement of transmitter and other operation errors.

Dynamic error: Sensors suitable for static conditions will have strong damping, so the response to the change of input parameters is slow, even several seconds before the corresponding temperature step change. Some weighing sensors with delay characteristics will produce dynamic errors in response to rapid changes. Response time, amplitude distortion and phase distortion all lead to dynamic errors.

Insertion error: It is caused by the change of measurement parameters when a sensor is inserted into the system. The use of a transmitter with too large a system, too slow dynamic characteristics of the system, too much heat loaded by the system self-heating will lead to insertion errors.

Environmental error: The use of weighing sensors will also be affected by temperature, oscillation, vibration, altitude, volatilization of chemical substances and other environmental factors, these factors are very easy to cause environmental problems.