TM 10-8415-208-12d.The emergency breathing apparatus is not approved for use in temperatures below +32°F (OC). Cold weathermay effect the electrical system of the emergency breathing apparatus since battery life and efficiency isdecreased in colder temperatures. If battery efficiency is decreased, the pressure switch may provide faultyreadings and cause the warning light to fail or flash inadvertently. The user could potentially lose remote air anduse all of the emergency air without warning.e.Cold weather could also cause a decrease in the cylinder pressure such that the EBA would not provide the userthe entire 6 to 8 minutes at 40 liters per minute of escape air.WARNINGOxygen deficiency hazard in the rebreather system. Do not use the rebreather system for operations attemperatures below +15°F (-9. 44°C). Below +15°F (-9. 44°C) there may be an increase of carbondioxide in the breathing mixture due to decreased efficiency of the CO2 absorbent. Operations below+15°F (-9. 44°C) could result in personal injury or death due to suffocation.f.The rebreather system is not approved for use in temperatures below +1 50F (-9. 44°C). Cold 5 weatherdecreases the efficiency of the carbon dioxide absorbent causing an increase of carbon dioxide and a decreaseof oxygen in the breathing mixture.g.If the breathing mixture does not have enough oxygen in it, the user will initially begin gasping for air andeventually pass out.2-17.2HotWeatherWARNINGHeat exhaustion hazard. Encapsulating protective suit users should be given sufficient recuperation timebetween operations in hot weather environments to avoid heat exhaustion. Fatigue, nausea and/ordizziness could result from extended use without proper rest and fluid replenishment. STEPO-I authorizedweartime (stay time) with cooling vest at ambient temperatures at or above 85°F (29. 44°C) is 45 minutesAmbient temperatures below 85°F (29. 44°C) is 2 hours.a.When the encapsulating protective suit is worn in hot weather environments, the user will be more prone to heatexhaustion. Fatigue, nausea and/or dizziness may result due to heat build-up inside the suit. Every effort shouldbe made to rotate personnel in the work cycle to allow the body to recuperate.b.As a general rule to prevent fatigue and heat exhaustion, the wearer's recuperation time should be equivalent tothree times the period of time that the suit is worn; however, the final decision on the appropriate recuperatingtime will be determined by the local medical authority.Change 22-35
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