Fault Analysis 1. survey: review before ignition failure, smoke, odor, change the power supply, lightning, humidity, misuse, wrong maintenance. 2. visual method: observation loop external damage, leakage impulse tube circuit overheating Rosemount transmitters, power switch status. 3. Detection method: 1) open circuit detection: suspected faulty part with the rest of separate check if the fault disappears, the disappearance of Rosemount transmitters origin if it is determined that the fault lies, or can enter the next step to find, such as: Smart Pressure Transmitter not properly Hart telecommunications, power can be disconnected from the meter body, with additional power field method for the transmitter is powered communicate, to see if the cable is about 2kHz superposition of electromagnetic signals and interference communications. 2) short-circuit detection: to ensure the safety of the case, the relevant parts of the circuit shorted directly, such as: the difference between the transmitter output value is small, impulse pipe can be disconnected from the outside take a pressure valve directly to the differential signal Bilateral directly lead to the differential pressure transmitter, observe the transmitter output to determine pressure pipe blocking leakage of connectivity. 3) Replace detection: suspected faulty part replacement, determine fault location. Such as: suspect transmitter circuit board failure, it can temporarily replace a Rosemount transmitters 3051s, in order to determine the cause. 4) Segment test: the measurement circuit is divided into several parts, such as: power supply, signal output, signal transmission, signal detection, by sub-part examination, from simple to complex, from outside to inside, narrow range, to find fault Location. Development pressure transmitter has undergone four stages: 1, early pressure transmitter works with large displacement, such as mass production of mercury has float and bellows differential pressure gauge pressure transmitter Rosemount change transmitter 3051, these transmitters low precision and bulky. 2,20 1950 with higher precision force balanced differential pressure transmitter, but the small force feedback, complex structure, reliability, stability and vibration resistance are poor. 3, the mid-1970s, with the emergence of new technology, new materials, new technology, especially the emergence of the rapid development of electronic technology, compact, simple structure displacement transducer. 4, the rapid development of science and technology 1990s, high measurement accuracy of these transmitters and the gradual development of the intelligent digital signal transmission is more conducive to data collection. Rosemount transmitters 3051s, Rosemount transmitters, Hua Hui science and technology provided by the Jinan-Technology Co., Ltd. Jinan Huahui Technology Co., Ltd. (www.cnhuahui.com/) strong, credible, in Jinan, Shandong pressure instrumentation industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead China-Technology into the brilliant and you work for a better future!