ADW Line Heat Detection

NSW 02 9644 7144 QLD 07 3252 5366 VIC 03 9544 2211 WA 08 9349 2972 • Intelligent alarm verification with DHW technology (Dynamic Heat Watch) • Individually programmable response behaviour with rate-of-rise and maximum evaluation • Traceability of pressure values and events for troubleshooting (saved on SD card inside the device) A false alarm is one that is correctly triggered by a sensor impulse, but where there is no actual danger. Brief temperature increases may occur when a roller door is opened in a warehouse, for example. The intelligent DHW (Dynamic Heat Watch) algorithm on the SEC-ADW-535 ensures that events of this kind are filtered out and not transmitted further as an alarm. Whilst this filter function is a technological milestone, it must be able to differentiate between false alarms and real dangerous situations with 100% reliability. Dynamic Heat Watch – the algorithm against false alarms. The system is optimally protected against failures: Using a booster pump, a test motor generates a defined overpressure in the sensing tube at specific intervals. If the registered pressure increase deviates from the saved default value (e.g. due to a leak or crushed tube), then the computer immediately triggers a malfunction. Alarm verification time Delay time Alarm verification Time [s] Pressure [ mbar ] Pressure dissipation dp/dt [ mbar/min ] Time [s] Pressure dissipation sequence Diff. alarm threshold Measured pressure sequence Alarm The SEC-ADW-535 cannot be deceived: 7