Verify the gas alarm should pay attention to the following aspects:
(1) In principle, the standard sample gas that matches the measured gas with the certified gas shall be used. The standard sample gas selected for the same measured medium is different, and the alarm point is also different.
(2) Before calibration, the surrounding environment of the probe should be free of flammable gas. If there is flammable gas, remove the rain cover, fill in a certain amount of clean air, and then continuously introduce sample gas to ensure the accuracy of the calibration.
(3) When the measured gas is a hydrocarbon mixture, isobutane is the preferred sample gas, followed by propane.
(4) For non-hydrocarbon mixtures or mixtures of gases with a lower explosive concentration and a greater difference in the amount of heat generated, a mixture of butane, isobutane, propane and other readily available and stable single components may be used. Fuel as a sample gas. At this time , the range of the alarm must be adjusted according to a certain detection signal conversion relationship.
(1) In principle, the standard sample gas that matches the measured gas with the certified gas shall be used. The standard sample gas selected for the same measured medium is different, and the alarm point is also different.
(2) Before calibration, the surrounding environment of the probe should be free of flammable gas. If there is flammable gas, remove the rain cover, fill in a certain amount of clean air, and then continuously introduce sample gas to ensure the accuracy of the calibration.
(3) When the measured gas is a hydrocarbon mixture, isobutane is the preferred sample gas, followed by propane.
(4) For non-hydrocarbon mixtures or mixtures of gases with a lower explosive concentration and a greater difference in the amount of heat generated, a mixture of butane, isobutane, propane and other readily available and stable single components may be used. Fuel as a sample gas. At this time , the range of the alarm must be adjusted according to a certain detection signal conversion relationship.
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