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調節器的規範標準CEEN250是最常見的開放式自給壓縮空氣潛水呼吸設備儀器的檢測和標記的規範。Thestandardcontainslimitsoninhalationandexhalationpressuresandoverallworkofbreathing.Itspecifiesthefollowing,undertestconditionsofabreathingrateof62.5litres(2.2cuft)perminuteandanambientpressureof6bars(600kPa):Workofbreathing:<3.0joulesperlitrePeakrespiratorypressure:±25mbar(±2.5kPa)(inhalationorexhalation)Inhalationworkofbreathing:<0.3jouleperlitrePressurespikeswithnomeasurablepositiveworkofbreathin...
調節器的規範標準CE EN 250是最常見的開放式自給壓縮空氣潛水呼吸設備儀器的檢測和標記的規範。
The standard contains limits on inhalation and exhalation pressures and overall work of breathing. It specifies the following, under test conditions of a breathing rate of 62.5 litres (2.2 cu ft) per minute and an ambient pressure of 6 bars (600 kPa):
Work of breathing: <3.0 joules per litrePeak respiratory pressure: ±25 mbar (±2.5 kPa) (inhalation or exhalation)Inhalation work of breathing: <0.3 joule per litrePressure spikes with no measurable positive work of breathing: <10 mbar (1 kPa)Pressure spikes with measurable positive work of breathing: <5 mbar (0.5 kPa)主要為測量在”焦耳/升”。測試的方式是以呼吸模擬器來檢測。調節器被連接到一個“測試潛水員”(人體模型),並下降到深水裡。人工肺在規定的速率吸入和呼出氣體並對呼吸阻力進行測量。測量在不同的深度,不同的溫度和不同的供給壓力進行。計算分析測試數據,構建呼吸曲線(WOB)的工作。曲線最好都集中在0.0線附近均勻的曲線,並且在吸入(下)和呼氣(上)曲線的區域越小越好。
雖然調節器滿足上述限制將提供足夠的空氣,但僅是最低的標準 (3.0焦耳/升 at 6 bar),高性能調節器在同樣深度時阻抗值小於0.8焦耳/升。當要比較呼吸曲線(WOB)是越密集接近越好。EN250規範並不適用於冰水,因為本規範的最低工作溫度是10°C。