| 摘要 |
FIELD: measurement equipment.SUBSTANCE: method to detect impact of gas medium factors at operability of electromechanical instruments includes formation of gas medium with specified combination of characteristics, such as composition, concentration, temperature, pressure and moisture, detection of the specified characteristics. At the same time the analysed electromechanical instruments are placed into a sealed container, which is equipped with sensors of pressure, temperature and moisture of the formed gas medium and placed into a climatic chamber. Then the container with electromechanical instruments is connected to a system of chromatographs, and gas medium is formed in it with the specified combination of characteristics, previously supplying a gas mixture of specified composition, concentration, pressure and moisture into the container previously dried with silica gel and vacuumised, to impact electromechanical instruments, from the previously prepared source of gas medium, sending the gas mixture via a moist gas generator. Then the container with analysed electromechanical instruments and formed gas medium is heated in the climatic chamber to the specified temperature within the specified period of time. Then detection of concentration of the specified gas components, temperature, pressure and moisture of gas medium acting at electromechanical instruments is carried out dynamically in the on-line mode with the specified time interval using simultaneously all chromatographs connected to the container, and also sensors of temperature and moisture, pressure, available in the container with electromechanical instruments, detection of operability of electromechanical instruments after impact of the formed gas medium is carried out using a set of equipment for inspection of instrument operability. The device for realisation of the method includes chromatographs for detection of concentrations of the gas mixture, sensors for measurement of pressure, temperature and moisture, a vacuum pump. At the same time the unsealed container with instruments and temperature, pressure and moisture sensors in it is placed in a climatic chamber, the sealed container is connected by means of a system of pneumatic transitions to the system of chromatographs, each of which detects concentration of the component from the composition of the analysed gas medium. At the same time at the inlet pneumatic line for supply of the analysed sample of gas medium into the system of chromatographs there are sampling valves installed for automatic and manual supply of a sample of the analysed gas mixture, the system of pneumatic lines is communicated with an exciter of flow maintaining the specified flow in the pneumatic line. Besides, the sealed container is connected with the system of chromatographs by means of an outlet pneumatic line for return of the gas medium into the sealed container.EFFECT: provision of the possibility of efficient and accurate detection of simultaneously all specified combination of characteristics of impacting gas medium, using which they decide on operability after all completed impacts.2 cl, 1 dwg, 2 ex |
