The prototype was developed and data calibration was completed on January 6, 2020. The acquisition module has 4 channels and uses a 24 bit signal acquisition chip. The collected signal type is DC 0-10V, and it supports RS232 (later upgraded to support both RS232 * and RS485 *), which can meet the collection of various sensors that output this signal. After data calibration correction, the accuracy of the module was finally determined to be 0.1%. The calibration data is shown in the table below.
At present, the module prototype is still in the testing stage of stability and anti-interference.