wireless photoelectric smoke detector

156.00EUR

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wireless photoelectric smoke detector

The ASD20 is a wireless photoelectric smoke detector with a fixed temperature heat detector and an internal piezoelectric alarm.

* Operation
Approximately every 7 to 8 seconds the unit tests for a smoke or heat alarm condition. During this sequence the unit also performs self diagnostics, and checks for tampers and faults. During normal operation the LED will flash every 50 seconds and the sounder will not sound. * Smoke Alarm
The smoke detector will go into alarm when the signal level exceeds the 'alarm' threshold and automatically restore when the signal level falls below the alarm 'restore' threshold. During an alarm the LED will flash 1/second and the sounder will sound continuous beeps. The smoke detector has a preset warning threshold at 75% of the alarm threshold. If the signal level stays above this threshold, but below the alarm threshold, for more than 120 seconds, the detector will go into the 'warning' state. If the signal level falls below the early warning 'restore' threshold, the detector will restore to its normal state automatically. If the signal level rises above the alarm threshold, the detector will go into alarm. The LED will flash and the sounder will chirp every 50 seconds when in the warning state.

* This feature is intended to provide a warning if the environment is persistently close to the alarm threshold and provide more time to investigate and either escape or correct the situation.

* Smoke - Drift Compensation
The detector automatically compensates for long-term environmentally induced changes to maintain a constant smoke sensitivity. When the drift compensation has reached its high or low limit of adjustment, the detector will go into the trouble state.

* Heat Alarm
The heat detector will go into alarm when the heat signal level exceeds the heat alarm threshold (135oF/57oC); and will automatically restore when the heat signal level falls below the heat alarm threshold (restore). During an alarm the LED will flash 1/ second and the sounder will sound continuous beeps.

* Tamper
The removal of the detector from the mounting plate initiates a 'tamper' transmission. The tamper condition is restored after the detector is mounted on the plate.

* Wireless Transmissions A supervisory message is transmitted at 12 minute intervals to the control panel. If the signal is not received the control panel determines that the detector is missing. The detector transmits the following:
- Alarm / Alarm Restore - (heat or smoke alarm). Transmitted at time of occurrence.
- Tamper / Tamper Restore - (tamper switch activated) 10 second maximum delay on restore before transmission.
- Low Battery - (battery voltage falls below threshold). The batteries are tested & transmitted at the time of a supervisory or other transmissions.
- Trouble - (detector fault or sensor compensation limit reached). Troubles are transmitted at the time of occurrence (one trouble per supervisory interval).

* Batteries
The ASD20 is powered by two, 3VDC lithium batteries.

This product was added to our catalog on Wednesday 03 February, 2010.

Produit consulté : wireless photoelectric smoke detector