How to Choose The Weighing Controller Matched with The Weighing Sensor

(1) Excitation voltage sent by the controller to the weighing sensor: each special weighing controller is generally equipped with a set of regulated DC power supply, which is sent to the sensor as the general weighing controller with excitation voltage (bridge output voltage), and the voltage is taken as 5V, 6V, 10V, 12.5V and 15V. It must be adapted to the recommended excitation voltage of the selected sensor. The load cell is allowed to use under voltage, but it is better not to exceed the recommended voltage.
(2) Load capacity of the controller : the output power of the excitation voltage source supplied by the weighing controller to the weighing sensor is limited. Therefore, the number of sensors it can accept is limited. This will be given in the instruction manual of the controller .
(3) It is easy to understand the length of the connecting cable from the controller to the sensor. The length of the cable from the sensor to the weighing controller should be limited, because in this cable, there is a considerable current on the core wire that outputs the excitation voltage to the sensor. Due to the effect of wire resistance, it will cause the loss (reduction) of the excitation voltage to the sensor, This will affect the work of the load cell. The length of the cable will be given in the operation manual of the weighing controller , so it should be consulted when necessary. In addition, if a slightly longer transmission distance is needed, the method of thickening the cable core can also be used.
(4) "Microvolt / division value" of weighing controller（ μ V / D value check: any weighing controller has built-in amplifier. Any amplifier, there must be a linear amplification area, that is, the input signal is too small or too large, the output of the amplifier will appear abnormal. Taking the 8142pro controller of Changzhou Toledo as an example, its input signal range is 3MV ~ 30mV; The display output value of the digital weighing controller is always increased or decreased by an integral multiple of the set graduation value. Therefore, the microvolt of the input signal corresponding to each graduation value output can be used as a characterization value of the weighing controller, namely the so-called "microvolt / graduation value"（ μ V / D value can be used as a characterization value.
Generally, a table will be attached to the instruction manual of each weighing controller to indicate the "microvolt / division value" of the controller（ μ V / D). Every time we choose the type, number of sensors to be used and the controller to be used, we should check whether the configuration conforms to the regulation of "microvolt / division value" of the controller. The sensitivity of the selected sensor is 2 MV / v; It is estimated that the output excitation voltage of the selected controller is 15V. According to the above parameters, the total output of the sensor is 2mV / v × 15V = 30mV meter's "microvolt / division value" value:   The division number of the controller is n: 5000kg / 1kg = 5000. Check the value given in the operation instructions of the controller.
According to 8142 instrument (single display), when the instrument is used at 5000 degree, the "microvolt / degree value" of the instrument is required to be 0.6 μ v/d~7.0 μ V / D, so the above configuration is available.

NOTICE: This site is reproduced by the editor of this website. The purpose of the reprint is to transmit more information. It does not mean that this website agrees with its views and is responsible for its authenticity. If you are involved in the content, copyright and other issues, please contact us within 30 days, we will delete the content in the first time! [Declaration] The copyright of this article belongs to the original author. The content is the author's personal opinion. This site is only for reference and does not constitute any investment and application advice. This site has the final interpretation of this statement.