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自救器在发生事故时工作可靠的条件之一是它完全气密.因此,在矿上要定期对自救器进行检查。以前,《湿式》检查法流行,该法是把自救器放到比周围介质温度高20℃的热水里1～2分钟,根据是否从自救器表面上升起气泡来判断自救器的气密性。但是,这个方法不够可靠,因此,全苏矿山救护工作科学研究所创造了《干式》检查自救器气密的仪器 СГ—1型和 ПГС 型,该种仪器在煤炭工业中获得了广泛的应用。
Self-rescuer One of the conditions for a reliable work in an accident is that it is completely airtight, so a self-rescuer must be regularly inspected at the mine. In the past, the “wet” method was popular. The method put the self-rescuer in hot water at a temperature 20 ℃ higher than the surrounding medium for 1 to 2 minutes. The air-tightness of the self-rescuer was judged according to whether the air bubble rose from the surface of the self- . However, this method is not reliable enough. Therefore, the Institute of Ambulance Services of the All-China Mines created the gas-tight instruments СГ-1 and ПГС of “dry” self-rescue devices, which have been widely used in the coal industry .