Weighing sensor is actually a quality signal into electrical signal output of the sensor device can be measured. Weighing sensor according to the conversion method is divided into photoelectric type, hydraulic type, the electromagnetic type, capacitance type, magnetic pole to change form, vibrating, gyro ceremony, the resistance strain type 8 classes, such as the most widely by using resistance strain type. On the weighing platform, the weight of the load must be a third (range) in different position of difference, as long as the absolute value of difference is greater than or equal to a degree value, we think the balance Angle difference.

If there is a Angle difference directly affects the accuracy of the weighing sensor, but the Angle difference of the influence of the weighing accuracy has certain concealment, is not easy to find for non-specialists. Users in weighing test, often in the middle of the scale body will think the whole balance between accurately, easy to ignore the Angle difference, so that the weight is not among the scale body weighing error caused when it is hard to find. So-called Angle difference of the main reason is because the sensors in the factory, the consistency of the sensor may not very ideal, coupled with the field of environmental factors in use (corrosion, collision, stamping, long-term partial load, etc.) and installation method of limit, bring more sensors and transmitte scale imbalance. To solve the above problem, must choose junction box to adjust the sensitivity of the sensor and the ratio of the sensor output impedance (mV/V/Ω) close, to ensure the balance of body balance.

Adjustment methods of weighing sensor junction box is divided into two kinds: adjust the voltage and the output signal for the bridge. From the actual use of perspective, tend to use voltage regulation for bridge, its advantage lies in the adjusting range is big (80 d), downside is that if the junction box quality is not good, later in the process of using, scale of drift. But on the whole precision, tend to use to adjust the output signal, its weakness is regulating range is small (6 d). We can have when the adjustable resistance in the middle position, record partial load test when the Angle of the maximum and the minimum, average, adjust the adjustable resistance of each sensor, the instrument shows the values for average. If directly from the maximum to the minimum or directly from the minimum to the maximum, probably because the adjusting range is limited, when the number of sensors is adjustable resistance has transferred to the limit are not up to requirements, and then the other weighing sensor adjustable resistance, effect is not obvious. Such weighing sensor Angle difference adjustment also become very simple.