The alarm limit of the oxygen detector is an important task related to the safety of personnel and the stability of the production environment. The setting of the alarm limit is not simply to set a fixed value, but to consider multiple aspects comprehensively and set reasonably, so as to better ensure the safety of personnel and the stability of the production environment. Do you know how to properly set the alarm limit of oxygen detector ? The following is an introduction to yiyuntian electronic editor:

How to reasonably set the alarm limit of the oxygen detector:

1. Underoxygen alarm setpoint :

When the oxygen content in the ambient air is less than 19.5 VOL, the human body may appear hypoxia symptoms, such as dizziness, fatigue, shortness of breath, etc., can lead to loss of consciousness and even suffocation in severe cases.Therefore, the oxygen detector's under-oxygen alarm setting is usually set to 19.5%VOL to trigger an alarm when the oxygen concentration drops to a dangerous level.

2. Oxygen enrichment alarm setpoint :

When the oxygen content in the ambient air is higher than 23.5 VOL, high oxygen concentration will accelerate the risk of fire, increase the oxidation rate of materials, and long-term exposure may lead to oxygen toxicity, such as visual impairment, lung inflammation, central nervous system damage and so on.Therefore, the oxygen enrichment alarm setting of the oxygen detector is usually set to 23.5%VOL to warn of possible peroxygen risks.

3. Consider the working environment and actual needs:

When setting the alarm limit of the oxygen detector, in addition to referring to national standards, it is also necessary to consider the specific working environment and actual needs. For example, in poorly ventilated environments such as confined spaces or underground pipe corridors, more stringent alarm limits may be required to ensure the safety of personnel.

4. Set alarm limits based on national standards:

According to the national standard GB/T 50493-2019 According to the requirements of "Design Standard for Detection and Alarm of Combustible Gas and Toxic Gas in Petrochemical Industry", the set value of peroxide alarm of oxygen detector should be 23.5 VOL, and the set value of under oxygen alarm should be 19.5 VOL.

In summary, it is the method to reasonably set the alarm limit of the oxygen detector.Through the correct setting and adjustment, we can ensure that the oxygen detector plays an important role in the critical moment, so as to better ensure the safety of personnel and the stability of the production environment.