Pressure monitoring unit for online analysis instrument

Abstract

The invention provides a pressure monitoring unit for an online analysis instrument. The pressure monitoring unit comprises an analyzer body; the analyzer body is provided with a gas circuit module; one side of the gas circuit module is connected with an external to-be-detected gas source; the other side of the gas circuit module is connected with a pressure monitoring module; and the pressure monitoring module converts a pressure value into an electric signal through a pressure sensor and transmits the electric signal to a monitoring circuit module. The pressure monitoring module converts thepressure value into the electric signal through the pressure sensor, the pressure monitoring module is connected with an online analysis instrument system through the gas circuit module, the monitoring circuit module is a main control unit, AD conversion and recording can be conducted on the electric signal of the pressure monitoring module, and meanwhile current pressure is analyzed; and when the pressure value fluctuates abnormally, a signal is sent to a user through a communication transmission module, and then timely response can be made when an external gas generator breaks down or the pressure of a steel cylinder gas source is insufficient.

Description

technical field [0001] The invention relates to the technical field of on-line analyzers, in particular to a pressure monitoring unit used in on-line analyzers. Background technique [0002] On-line analytical instruments are applied in various fields, and indicators are continuously monitored. In order to ensure the reliable, stable and accurate operation of on-line analytical instruments, the stability and reliability of gas sources are particularly important for chromatographic analysis instruments. [0003] At present, the commonly used online analysis instruments on the market do not include a gas source pressure monitoring unit and cannot record the external pressure in real time. Therefore, when the external gas generator fails or the gas source pressure of the cylinder is not enough, it cannot respond in time. Contents of the invention [0004] The object of the present invention is to provide a pressure monitoring unit used in an on-line analytical instrument to s...

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Problems solved by technology

[0003] At present, the online analysis instruments commonly used in the market do not include a gas source pressure monitoring unit, and cannot record the external pressure in real time. Therefore, when the external gas generator fails or the gas source pressure of the cylinder is not enough, it cannot respond in time.

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