Method and apparatus for alarm verification in a ventilation system

摘要

Method and apparatus for testing the operation of an alarm for a ventilated enclosure, such as a fume hood or bio-safety cabinet. Flow of gas being exhausted from the enclosure may be adjusted to a known value below or above a threshold value at which the alarm provides an indication that flow is unacceptably low or high. Adjustment of flow to the known value may be performed without requiring a manual measurement of flow, e.g., by performing a traverse in a duct leading from the enclosure.