Method for detecting the quality of weighing sensors

Firstly, measure the resistance values of the input and output terminals of the sensor. If there is a certificate of conformity for this sensor, compare it with the resistance indicated in the certificate. If the measured values exceed the standard range, it indicates that there is a problem with this sensor. There are currently two commonly used sensor resistance values:

One type is low impedance, with an input of 400& Omega& Amp; Plusmn; 20& Omega;, Output terminal: 350& Omega& Amp; Plusmn; 5& Omega;; One type is high impedance, with an input of 800& Omega& Amp; Plusmn; 20& Omega;, Output terminal: 700& Omega& Amp; Plusmn; 5& Omega;; In addition, you can also measure the output signal of the sensor. Using the MV voltage range of a digital multimeter, add 10VDC to the input terminal of the sensor, and then measure the output terminal voltage of the sensor. This voltage value is 10V X sensor sensitivity X sensor force value/sensor range value; If the measured value differs significantly from the calculated value, it indicates that the sensor is damaged.

1. The working voltage of the weighing sensor EXC+, EXC - must remain stable (sensor working voltage)

2. Each group of sensors should have the same range and sensitivity

3. When there are 3 2Ts, the total full range of the pot is 6T

When the sensitivity of each sensor is 2.0mv/v, the total output of the junction box is also 2.0mv/v

When the weighing of various positions on the weighing platform is inaccurate, it is necessary to adjust the scale and place the calibrated weights in the four corners of the platform in sequence, so that the weight of each corner is displayed equal and equal to the value of the weight placed