Detector Sensitivity Settings Appendix C: AWACS™ ApplicationsNFS-640 Programming Manual P/N 51333:B 10/03/2003 91How to Test Detectors Set Below 0.50% Obscuration per FootUsing alarm sensitivities below 0.50% obscuration per foot requires a 90-day test to ensure that thedetector environment is suitable for the higher sensitivity setting. To meet Notifier and UnderwritersLaboratory requirements, test each detector planned to operate below 0.50%/ft obscuration as follows:1. Set the detector as follows:2. Operate detectors continuously for 90 days with all environmental factors (such as, temperature,humidity, air flow, occupancy, and so on) similar to the intended application for the detectors.Record all events for each tested detector with an electronic History buffer or a printout.3. At the end of the 90-day test: An authorized Notifier representative, or an end user trained by anauthorized Notifier representative must inspect the results of the test. If the test results show noalarms or pre-alarms for the tested detectors, reprogram the fire alarm system to set the Alarmsensitivity to the more sensitive Pre-Alarm level of the test.Step Action1 Initially set to the 0.50% obscuration per foot Alarm level.2 Set the Pre-Alarm level to the desired final Alarm sensitivity.3 Set the Pre-Alarm to Alert mode (non-latching).www.PDF-Zoo.com
