As one of the commonly used instruments in confined space working places with poor ventilation, the four-in-one gas alarm can effectively protect the health and life safety of on-site personnel. However, during the normal use of the instrument, due to various reasons, there may be problems such as the carbon monoxide of the 4-in-1 gas detector not returning to zero or alarming all the time, resulting in the inability to detect the concentration value of carbon monoxide in a timely and accurate manner. Below, Winrun Group will introduce in detail the reasons why the carbon monoxide does not return to zero and how to deal with it in the 4-in-1 gas detector.
First, we need to understand the properties of carbon monoxide. Carbon monoxide is a common toxic and harmful gas, which is colorless and odorless transparent gas at room temperature and pressure. It is both a flammable and explosive gas, with a limit of 125%~74.2%vol, which is also a toxic and harmful gas to the human body, the occupational exposure limit PC-TWA is 20mg m3 (non-plateau altitude less than 2000m above sea level), and the critical adverse health effect is carboxyhemoglobinemia. Therefore, the detection of carbon monoxide is very important.
Next, let's take a look at the reasons why carbon monoxide does not return to zero for 4-in-1 gas alarms. First, there may have been a zero drift in the instrument, resulting in a non-zero carbon monoxide concentration value displayed. Secondly, there may be a gas leak in the air at the site, and the carbon monoxide concentration value displayed by the instrument is the normal value detected. Third, there may be foreign objects blocking the sampling probes and pipelines of the instrument. Fourth, due to human error, the carbon monoxide standard control curve that has been set by the instrument has been incorrectly calibrated. Fifth, the internal circuit components or wiring of the instrument may fail. Sixth, the carbon monoxide sensor fails and cannot continue to be detected normally.
In view of the problem that the carbon monoxide of the 4-in-1 gas detector keeps alarming, we can take the following treatment methods. First of all, move the instrument to an outdoor clean air environment, and check whether the instrument is still abnormal after stabilization. Secondly, enter the menu interface of the instrument to check whether the alarm setting value of the instrument is normal, if the setting value is too low, it should be set correctly again. Third, use another instrument within the expiration date to test to verify whether it is a normal alarm that the carbon monoxide in the ambient air has exceeded the standard, or a problem with the instrument. Fourth, check whether the air inlet, filter device, and air inlet pipeline of the instrument are blocked and clean them in time. Fifth, restart the instrument and check whether the instrument still alarms. Sixth, enter the instrument menu interface and check whether the instrument is normal after resetting the factory settings. Seventh, enter the menu interface of the instrument, and re-calibrate the zero point of carbon monoxide of the instrument in a pure air or nitrogen environment. Finally, if the carbon monoxide value displayed by the instrument is still abnormal after taking the above measures, you should contact the after-sales staff of Winrun Group in time for treatment.
To sum up, there are many reasons why the carbon monoxide of the 4-in-1 gas detector does not return to zero, and the user should strictly follow the relevant operation specifications on the instrument manual. If you can't solve the problem by yourself, you should contact the staff of Winrun Group in time to deal with it, and do not dismantle the instrument by yourself, so as not to cause irreversible damage to the instrument. From a long-term perspective, if you want to solve the problem of carbon monoxide alarm of the four-in-one gas alarm once and for all, you should choose a portable pump-suction four-in-one gas detection alarm instrument with imported high-performance sensors with zero point automatic tracking and multi-level calibration function of the target point. For more information, please contact Winrun Group staff.
The non-return of carbon monoxide to zero in the 4-in-1 gas detector is a common problem, but as long as we understand the cause and take appropriate treatment methods, we can ensure the normal use of the instrument and the safety of personnel. When using a 4-in-1 gas detector, we should always be vigilant and follow the correct operating procedures to ensure the accuracy and reliability of the instrument. At the same time, it is important to maintain and overhaul the instrument regularly. Only by doing these things well can we better protect the health and life safety of on-site personnel.