SMOKE SIMULATOR FOR SCATTERED LIGHT DETECTORS, PROCESS FOR REGULATING THEIR SENSITIVITY TO SMOKE AND USE OF THE SIMULATOR

摘要

A smoke simulator contains a transparent body (5) in which are enclosed incident light scattering centres (6). In order to regulate the sensitivity of smoke alarms having a light source (1), a sensor (2), a measurement volume (3) crossed by light and evaluation electronics, the transparent body (5) is placed in a defined position in the measurement volume (3) and is lighted by the light source (1). The evaluation electronics is then tuned to the output of a predetermined signal which preferably corresponds to the smoke density which forms the alarm concentration of the smoke alarm.