Instrument in the industrial production process plays an important role in the detection, display, record or control of process parameters, process production process detection is the basic means to understand and control industrial production, only at any time can accurately understand the overall picture of the process and control, in order to ensure that the production process is smooth and with high productivity and small consumption to produce qualified products. So don't look at the instrument, but the most indispensable, so the selection of instruments is also very important!
1. Conditions of the process
The temperature, pressure, flow, viscosity, toxicity, pulsation and other factors in the process are the main conditions to determine the selection of instruments, which is related to the rationality of instrument selection, the service life of the instrument and the fire prevention and explosion prevention of the workshop.
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2. Operational importance
The importance of the parameters of each detection point in operation is the basis for the selection of the instrument's indication, recording, integration, alarm, control, remote control and other functions. Generally speaking, the variables that have little impact on the process but need to be monitored frequently are optional indicators. For important variables that need to know the changing trend frequently, recording should be selected. For some variables that have a greater impact on the process and need to be monitored at any time, control should be set, for variables that are related to material accounting and power consumption and require measurement or economic accounting, should be set up, and some variables that may affect production or safety should be set up alarm.
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3. Economy and uniformity
Instrument selection is also determined by the scale of investment, in order to meet the requirements of the process and self-control under the premise of the necessary economic accounting, to obtain the appropriate cost performance, in order to facilitate the maintenance and management of the instrument, in the selection should also pay attention to the unity of the instrument, as far as possible to choose the same series, the same specification model and the same manufacturer's products.
4, the use and supply of instruments
The selection of instruments should be a more mature product that has been used on site to prove reliable performance. At the same time, it should be noted that the selection of instruments should be a sufficient supply of resources and will not affect the production schedule