What are the precautions when calibrating a combustible gas detector?
What issues should be noted when calibrating combustible gas detectors? Today, Ousenjie has compiled the following knowledge to share with everyone, hoping to be helpful.
1. Is the ventilation environment good
When the gas concentration exceeds the lower explosive limit, it is necessary to avoid verifying combustible gas detectors. Although this situation rarely occurs, sometimes poor ventilation in the laboratory can lead to gas accumulation, leading to a sharp increase in gas concentration in the short term, which has a significant impact on the calibration and verification results and safety of the instrument.
For example, when calibrating a catalytic combustion combustible gas detector with an instrument, the sensor used is the catalytic active element of the carrier. If the concentration of combustible gas exceeds the lower explosive limit, the sensor will be severely poisoned and other components will be burned.
2. Combustible gas detectors cannot be calibrated in areas containing sulfur, arsenic, phosphorus, silicon, aluminum, and other elements or compounds.
Due to these elements or their compounds damaging the sensor, the sensitivity of the instrument decreases, the service life is shortened, and in severe cases, the instrument may fail. On site maintenance can lead to the volatilization of some welding materials and adhesives. Therefore, in a laboratory environment, on-site maintenance should be avoided.
How to effectively select a gas monitor in a limited space and what is the method
Gas detectors used in limited spaces are usually portable gas detectors. There are many types of portable gas detectors, including single, double gas, triple, quadruple, quintuple, and even six in one gas detectors. Under normal circumstances, the more types of gas detected, the more expensive the price.
So how to choose a limited space gas detector needs to be combined with our actual needs to purchase.
Limited space refers to a closed or partially enclosed space that is relatively isolated from the outside world, with narrow entrances and exits, and operators cannot work inside for long periods of time. Limited space usually has poor ventilation, which can easily cause long-term accumulation of toxic, harmful, flammable, and explosive substances, or lead to insufficient/enriched oxygen content.
A single portable gas detector cannot meet the detection needs of a complex and limited space, so it is best to choose a composite gas detector with dual gases or more when selecting.
It can be widely used for confined space entry, atmospheric monitoring, petrochemical, metallurgical, mining, environmental cleanliness monitoring, landfill monitoring, rapid response of hazardous substances, industrial paint, leak detection, indoor air quality IAQ monitoring, etc. It can effectively ensure the safety of workers and production equipment from damage.
