Bimetallic thermometer in what problems may arise in the process of installation and debugging

Bimetallic thermometer during the process of installation and debugging, what are the possible problems and how to solve? Transmitter output. Have encountered this kind of circumstance to see the power of the transmitter to reverse, if meet the, to connect power supply polarity can be correctly; Measurement transducer power supply, check whether there is a 24 v voltage, transmitter power is greater than 12 v, if there is no power supply, check whether the circuit break line, testing instrument have selected error and so on; If it's with a header, check whether the header is damaged, if is a problem of header, it is ok to replace. Check whether the power is in the transmitter power input; Take the power cord on the power supply terminals. Transmitter output is less than 20 ma, check whether the power of the transmitter is normal, if less than 12, will check whether there is a big load in the circuit, the input impedance of transformer load to conform to the transmitter power supply voltage; Whether the actual pressure more than pressure transmitter of the selected range, to choose appropriate range of pressure transmitter. If the pressure sensor is damaged, serious overload can damage isolation diaphragm, this time need to send back the manufacturer to repair; Connection is loose, broken line and tight; The power line connection is correct, the power cord to connect on the corresponding terminal. Problems of the bimetallic thermometer, we need to understand some simple processing method, that it doesn't appear problem when the controls.