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The Load Cell Error Analysis
Oct 26, 2017

The load cell error analysis

1.weighing sensor use error is the operator occurred, this also means that there are many reasons for this, such as the failure of the temperature to occur at the same time, including the fault of the probe placement or the improper insulation between the probe and the measuring address, and some other errors that include the fault in the process of purifying air or other gases, Using errors also touches the fault placement of the transmitter, so positive or negative pressure will affect the correct readings.


2.the characteristic mistake is inherent to the equipment, it is the difference between the equipment, the accepted characteristic of transporting function and the real characteristic, this kind of mistake includes the DC drift value, the slant incorrect or the slant's non-linear.


3.dynamic error Many of the sensor's characteristics and calibration are applicable to static conditions, this means that the input parameters used are static or similar to static, many of the sensors have strong damping, so they do not respond to the changes in the input parameters, such as, thermistor demand for a number of seconds to echo the step change in temperature.


4.Thermistor will not immediately jump to the new impedance, or a sudden change, on the contrary, it is slowly changed to the new value, and then, if the delay characteristics of the weighing sensor to the temperature of the rapid changes in the echo, the output waveform will be distorted, due to the dynamic error involved. The factors of dynamic error are echo time, amplitude distortion and phase distortion.


5.Insertion error is when a sensor is punctured in the system, as a result of changes to the measurement parameters, the common is in the electronic measurement of the problem will be presented, but in other methods of measurement will also present similar problems, such as a voltmeter in the loop to measure the voltage, it will certainly have an inherent impedance, Much larger than the loop impedance, which may present a loop load, at this point, the reading will be a big mistake, this type of error occurs because of the use of a system (such as the pressure system) too large transmitter; Perhaps the system is too slow, perhaps the system has been heated to load too much heat.


6.Environmental error comes from the use of the sensor environment, weighing sensor elements include temperature, or swing, sensation, elevation, chemical evaporation or other elements, which often affect the characteristics of the sensor, so in practice, these elements are always sorted together.