Temperature instrument installation considerations

1, temperature instrument installation location should choose in the medium temperature change and sensitive representative place, unfavorable choose resistance components such as valves, weld and medium flow beam near a corner. On the instructions to install the thermometer where convenient for observation. The installation of thermocouple location should be far away from the magnetic field. Temperature if a component is installed on tilt or bend pipe installation, should be against the flow. Bimetallic thermometer in & le; (a pipe or thermal resistance, thermocouple in & le; DN70 piping installation, must add tube. Expanding tube should be made (according to the standard drawing See chapter 10) 。 Pressure type thermometer bulb must all immersed in measured medium. 2, temperature of secondary table to form a complete set of use. Thermal resistance, thermocouple to match the corresponding secondary tables or transmitter. Particularly want to pay attention to the index, index number of different tables can't misuse. 3, thermocouple must use the corresponding index number compensating lead wires. Thermal resistance appropriate USES three wire connection, to offset the influence of ambient temperature. Every second table has its external line resistance requirements, in addition to the compensation of the line resistance wire or cable, still must use manganese copper wire with the corresponding resistance, to comply with the requirements of the second table. 4 through the metal flexible pipe, compensation wire or cable connected to the thermocouple or heat resistance. 5, if the same tube line at the same time there is pressure temperature of a point or a point, pressure is a point should be in June and temperature secondary instrument installation is relatively simple. The monomer calibration qualified secondary table installed in the specified separately according to the installation instructions on the dashboard or frame. Temperature of the secondary instrument is developing rapidly in recent years, a kind of display instrument, most of the pointer indicating secondary table ( The moving coil meter) Gradually by the dimensions completely replaced by the digital display thermometer.