How to improve the performance of electronic platform scales

Electronic platform scale, printing electronic platform scale, how to improve the performance of universal electronic platform scale

2017-6-28 Zhongyuan Weighing Apparatus Factory

How to improve the performance of the electronic platform:

1. Sensor technical indicators guarantee: As the core component of the electronic scale, the sensor is the key to ensure the quality of the electronic scale. Whether it is linearity, creep, no-load temperature coefficient, sensitivity, etc. are important indicators of the load cell.

2. Nonlinear compensation: The digital quantity of the electronic scale after analog-to-digital conversion should be linear with the weight applied to the electronic scale. During the production process, the accuracy is calibrated and the internal computer program is used for single-point calibration. The slope of the number and weight is calculated according to the ideal straight line and stored in the memory. This makes it impossible to overcome the nonlinearity errors produced by the load cell and the integrator. With multi-point correction, using multiple lines to approximate a curve effectively reduces nonlinear errors without increasing hardware costs.

3. Circuit temperature coefficient. Theoretical analysis and experiments prove that the input resistor and the temperature coefficient of the feedback resistor are important factors affecting the sensitivity temperature coefficient of the electronic scale. The metal film resistor with a temperature coefficient of 5×10-6 must be selected. High temperature testing must be performed for each electronic scale produced. For some products with a small temperature difference, the product can be compensated with a metal film resistor with a temperature coefficient of less than 25×10-6. At the same time of high temperature test, the product is temperature aging, which improves the stability of the product.