Weighing the type of sensor error
A load cell application error is generated by the operating staff, this also means that the causes of, for example, temperature measurement errors, including incorrect insulation between the probe placed errors or probe measurement locations, the other some application errors, including error in the air or other gas purification process, application errors involving the error of the transmitter placed, and thus the positive or negative pressure will be the correct reading impact.
2, the characteristic error is defined as equipment inherent, it is the ideal equipment, the difference between recognized the transfer of features and the true character of this error include DC drift value, beveled or slant of the non-linear.
3, the dynamic error characteristics of the sensor and calibration are applicable under static conditions, which means that the input parameters used in static or quasi-static, many sensors with strong damping, so they will not be changes in the input parameters fast response thermistor requires a few seconds to respond to temperature step change.
, Therefore, the thermistor will not immediately jump to the new impedance, or mutate the contrary, it is slowly changing to the new value, which, if the delay characteristics of the load cell to respond to rapid changes in temperature , the output waveform will be distorted, since there contains a dynamic error. The dynamic error factors are response time, amplitude distortion and phase distortion.
5, insert the error is the error generated when a sensor is inserted in the system, due to changes in the measured parameters, generally when making electronic measurements would be such a problem, but will be similar in other ways of measuring, for example, a voltmeter to measure voltage in the loop, it must have an inherent impedance than the loop impedance is much larger, or there is a loop load, then the reading will have large errors, this type of error causes is to use a pair of systems (such as pressure systems) are too large transmitter; or the dynamic characteristics of the system is too slow, or too much heat the system self-heating load.
Environment error from the sensor to use the environment load cell factors including temperature, or swing, vibration, altitude, volatile chemicals, or other factors, which often affects the characteristics of the sensor, so in practical applications, these factors are always are classified together.
· Note when the load cell selection
· Resistance strain gauge load cell
· The load cell errors