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7, choose the international famous brand intelligent control instrument -- SIEMENS PLC programmable controller as the core, combined with the
The company's unique design, can modify the system operating parameters, LCD liquid crystal display input and output status, date, time and other parameters, with RS485 communication interface. Through the simulation operation of the visual display system (A, B adsorption tower adsorption regeneration, unqualified automatic emptying state, molecular sieve nitrogen sink alarm indication, fault alarm etc. the purity of intuitive and simple operation process); provide passive remote control, status monitoring, automatic and manual operation and fault prompt the dry contact signal; the equipment under the chain control and automatic operation control system, when the user is not stable when the amount of nitrogen, gas equipment based on the changes of automatic start / stop, can make such (using gas must be installed together. The nitrogen storage tank); automatic disqualified nitrogen emptying system, ensure the qualified nitrogen output. The user can according to the requirements set by the purity of nitrogen nitrogen purity alarm, when the equipment is started or when using purity declined, the device will automatically discharge substandard nitrogen, without manual venting; online monitoring shows the purity of nitrogen, nitrogen purity percentage, with distance 4 ~ 20mA analog output, can realize remote monitoring. The calibration instrument can be directly in the air, convenient use and maintenance.