Smart Pressure Transmitter Calibration using conventional methods described above for smart transmitter calibration is not enough, because it is the principle of HART transmitter structure decision. Because smart transmitter between 4-20mA current signal input pressure source and produce, in addition to mechanical, circuit outside STG74L, there are micro-processing chip computing tasks STG74L input data online, so adjust the conventional methods are the difference. In fact, manufacturers of smart transmitter calibration is also described as ABB transmitter smart transmitters STG74L, calibration there: "Setting Range" and "re quantitative process", "fine-tuning" of the points. The "set range" operating mainly through the LRV, URV is set to complete the configuration of the digital work, but "the quantitative process' operator requires the transmitter is connected to a standard pressure source imported STG74L, guided through a series of instructions, direct induction by the transmitter and the actual pressure value can be set. The initial range ultimately set depends directly on the real pressure input value. But to see that in spite of the transmitter analog output and input values ??used in the correct relationship, but Numerical values ??will display digital readout process is slightly different, which can be calibrated by spinner Fault commissioning steps 1, views differential pressure transmitter power is reversed, and the positive and negative power supply is not connected correct. 2, the measuring transmitter power supply, if there is 24V DC voltage; it must ensure the supply of power to the transmitter voltage ≥12V (ie the transmitter power input voltage ≥12V) should be checked if there is no power circuit is disconnected. detecting whether the selected instrument error (input impedance should ≤250Ω) and so on imports STG74L |. Hua Hui Technology (online consultation) | STG74L provided by the Jinan-Technology Co., Ltd. Jinan Huahui Technology Co., Ltd. (www.cnhuahui.com/. ) Shandong Jinan, pressure meters leaders, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer demand in China - Technology leadership with the staff warmly welcome all inquiries negotiations, Chong Hua Hui science and technology better future.