In many industrial production processes, the installation of combustible gas alarms is inseparable. Through the installation of combustible gas alarm, we can effectively put an end to all kinds of security risks in the bud, so as to better ensure the safety of production. However, with the different application requirements, we sometimes need to adjust the detection range in the process of using combustible gas alarm. Do you know how to adjust the detection range of combustible gas alarm ? The following is a brief introduction by yi yun Tian:

combustible gas alarm detection range adjustment method, in the" petrochemical combustible gas and toxic gas detection and alarm design code "(GB50493-2009) there are detailed provisions:

1, combustible gas level alarm set value is less than or equal to 25% of the lower explosion limit.

2. The secondary alarm setting value for combustible gas is less than or equal to 50% of the lower explosive limit.

combustible gas alarm has a measuring range of 0-100% LEL. according to regulations, the low alarm is generally set between 15% and LEL-25 LEL, the high alarm is generally set to 50% LEL, and the low alarm point of most current combustible gas alarms is set to 25% LEL.

Therefore, when performing explosion measurement, the alarm concentration is generally set below 25% LEL of the lower explosion limit. The measuring range of the combustible gas alarm is 0-100% LEL.Therefore, when the combustible gas alarm adjusts the detection range, the explosion lower limit value of a certain gas is generally divided into 100 equal parts, and two high and low alarm values, 25% LEL and 50% LEL, are set. Even if the instrument reaches the 50% LEL, it is still very safe, because the 50% is divided 100 the explosion lower limit value, so it is still very safe.

In summary, it is the adjustment method of the detection range of the combustible gas alarm. In general, before the combustible gas alarm leaves the factory, the manufacturer has adjusted the value according to the gas concentration of each 1 gas, so the customer can use it immediately without debugging. If you need to adjust, only according to the actual situation, to the appropriate measurement range can be.