Principle of Gas Concentration Online Monitoring and Alarm System

Principle of Gas Concentration Online Monitoring and Alarm System

This system uses * sensors, combined with the powerful control capability of the CPU, to monitor the concentration, oxygen content, and environmental temperature and humidity of SF6 gas in real-time online, and transmit the measurement results digitally through a bus. Accurately and timely grasp the condition of the operating equipment, and also control the exhaust of the fan.

system function

◆ Quantitative detection function for SF6 gas and O2 concentration in the environment;

◆ Quantitative detection function for temperature and humidity in the environment;

The detection interval can be adjusted by the user, and the tracking function of suspicious detection points can be automatically strengthened;

◆ Determine whether the on-site data exceeds the set limit, and if it does, perform control output actions such as alarm and fan start;

The LCD displays real-time detection data and historical data records. The historical data records include the alarm time, various environmental parameters at the time of the alarm, the most recent measurement parameters, the most recent fan start time, and other parameter recording and query functions.

◆ Time setting, fan working parameter setting, unit setting, detection mode setting, alarm limit setting can be done through the keyboard, and there is a manual forced start function for the fan.

◆ It has the function of uploading data to a PC;

◆ It has the function of linkage with fire protection;

◆ Equipped with human body sensing start voice function;

◆ Equipped with human body induction to start the fan function;

◆ Automatic zero calibration function, overcoming drift and false alarms, and system self diagnostic function;

Principle of Gas Concentration Online Monitoring and Alarm SystemProduct Features

◇ High precision real-time detection

The combination of ultrasonic sound velocity measurement and attenuation method in this system enables quantitative and real-time online measurement of SF6 gas concentration, overcoming the shortcomings of traditional measurement methods such as negative corona discharge method and halogen sensor method that can only qualitatively determine whether the limit is exceeded, and cannot accurately obtain the SF6 content in the gas.

◇ Software and hardware can be trimmed

The detector of this system is multifunctional, and its functions can be flexibly adjusted through convenient external settings to meet the needs of different occasions, making every effort to save costs for customers.

◇ Ultra low false alarm rate

This system addresses the high false alarm rate of traditional products by using temperature compensation to eliminate the effects of air disturbances, mixed gases, temperature and humidity changes, and fundamentally solve the problem of system instability.

◇Multi detection function

This system is mainly designed to detect SF6 gas leakage and oxygen deficiency, and also has auxiliary detection functions for environmental data such as temperature and humidity, which comply with the requirements of the "Electricity Safety Work Regulations".

Complete communication network

This system combines the RS485 interface to detect various data from multiple units on site, and then transmits it to an SF6 gas monitoring host for processing, display, instruction, and storage, forming a suitable communication network.

◇ Historical data recording and querying

This system is equipped with a large capacity data storage, which can record historical data in real time and query historical data at any time.

◇ Long life design

In order to extend the lifespan of this system, SF6 sensors adopt intermittent operation, greatly improving the stability and service life of the sensors.

◇ High degree human-machine interaction function

This system's LCD output includes on-site parameters, alarm history data, and the last fan start time. It can also be used to set time, fan operating parameters, alarm limits, etc. through keyboard and LCD joint operation, and has the function of manually starting the fan.

◇ Strong anti-interference ability

This system has fully considered the issue of interference and adopted various effective anti-interference processing methods in hardware circuit and software design, ensuring the stable operation of the system and the accuracy of measurement data;