Project Details
Hello, this is Assistant Manager Jeong Pil-seung of RS Korea’s Technical Sales Department. Recently, due to revisions to occupational safety and health standards, blog posts related to gas concentration measurement installation in fire extinguishing agent rooms and protection areas have mainly been written. However, our main product is a complex gas measuring device that measures gases in a complex way with a single device to prepare for suffocation accidents in confined spaces, which is a slightly higher concept.
This is the content of Chapter 10, Section 1, Article 618 of the Rules for Occupational Safety and Health Standards. Gases that must be measured are designated to prevent worker suffocation in confined spaces. Since the revision in 2017, it has been specified to measure the following five gases: O2 (oxygen) CO (carbon monoxide) CO2 (carbon dioxide) H2S (hydrogen sulfide) EX (explosion hazard gas) These are the five gases.
When it comes to suffocation accidents, it is easy to think only of lack of oxygen, but there are also suffocation accidents caused by harmful gases. Asphyxiation due to toxic gas can occur even with very low concentrations of gas. Below is a table related to the damage to the human body by concentration of toxic gases that can cause chemical asphyxiation. The unit PPM means one part per million, and 1% is calculated as 10,000ppm. In other words, if the site is identified using only an oxygen concentration meter, an accident due to toxic gas may occur.
After a long time talking about the most basic occupational safety and health standards, I felt like I had gone back to the basics, so I suddenly started talking a lot. Now let’s get to the point. The site where this installation was conducted is a sewage treatment plant located in Paju.
Since the neighborhood itself is a new city, the buildings were clean and the inside of the treatment plant was clean and free of bad smells. Of course, the situation at the sewage treatment plant itself is much better than at sites that process food or livestock waste. The space is spacious and the ceiling trays are not complicated, making it a great site for wire work. Unfortunately, due to the small number of workers, I was unable to take pictures of the entire installation. Should we add a photographer to the construction team in the future? Still, I will include explanations along with photos of key points.
Gas meters were installed in the center of two primary treatment facilities. It's dark so it's hard to see in the photo, but it was treated with 16mm waterproof corrugated pipe. A status board was installed at the entrance on the first basement level, 30 to 40 meters away. According to the user's request, the line was treated with malting most similar to the door color, and the wires were neatly processed toward the emergency exit. The status board supplies 220V power, and through the power converter installed inside, the wiring is completed using 2 strands of 24V DC power and 2 communication lines for 485 communication between the measuring instrument and a total of 4 core shielded wires. When power is supplied only to the status board, the measuring instrument is turned on at once.
Shortly after the measuring instrument is turned on, during loading or when there is a communication error, all channels 0 are displayed in yellow as shown in the photo on the left. Fortunately, this time, there were no wiring or setup issues and it was a loading time issue. After the measuring sensor warm-up time has passed, the values for each channel are displayed in green within the normal range. The oxygen concentration was lowered outside the alarm range using test gas. The sound, light, and warning light operate along with the red numerical display. Following the measuring instrument test, maintenance guidance was provided. Below is the information. The installed sensor is electrochemical and catalytic combustion and has an expected lifespan of 2 years. Product defect warranty is 1 year. We recommend calibration every 1 year to check the normal condition of the product. Calibration outside of the recommended cycle can be performed according to internal regulations. Calibration can be done with a KOLAS report issued by a national certification agency or a report from the WANDI brand itself. Of course, the cost of issuing a national agency certificate is more expensive. On-site calibration is also possible, and you can disassemble the product and send it to RS Korea. When performing on-site calibration, travel costs vary depending on the region. All sensors that are two years old must be replaced. All replacements are carried out in Korea and are always in stock. There were additional user inquiries. You asked about the meaning of combustible gas, the meaning of %LEL concentration, examples of gases that react to the sensor, and the alarm standards of the installed gas sensor. This inquiry was explained on site and the materials below were attached and sent via email.
This concludes the post about the complex gas meter FIX800 4GAS, which prevents suffocation accidents in confined spaces of sewage treatment plants, which had to be filled with words because there were few pictures. If you have any questions about the product, please contact us at any time during weekday working hours.
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