Ma Output Signals; Detection Sensitivity - Dräger Flame 2000 Notice D'utilisation

en Technical data
7.3

20 mA output signals

Detector status
Fault
BIT fault
Normal
Warning
Alarm
7.4

Detection sensitivity

7.4.1 Standard fire
Detection sensitivity is the maximum distance at which the flame
detector reliably detects a specific size of fire and typical type of fuel
(standard fire).
The flame detectors have different numbers of sensitivity levels:
Dräger Flame 2000: 2

Dräger Flame 2500/2570/2700: 4

The sensitivity levels refer to a standard fire. The standard fire is
2 2
defined as a 0.1 m (1 ft ) n-heptane pan fire, with maximum wind
speed of 2 m/s (6.5 ft./sec).
For each sensitivity level there are 2 response levels:
Warning

Alarm

The detection distance at which a warning is issued is approximately
10% longer than the detection distance for an alarm.
For some typical ambient conditions, the Zeta parameter as defined in
NFPA 72 for the flame detector is 0.005 (1/meter).
22
Output
0 +1 mA
2 mA±10%
4 mA±10%
16 mA±5%
20 mA±5%
Note: Zeta parameters may vary significantly with changes in
temperature, air pressure, humidity, visibility conditions, and so on.
For information on the immunity to false alarm sources, please refer to
the Technical Manual.
Alarm response times of Dräger Flame 2000
Alarm response times for a standard fire are as follows:
Sensitivity level Response time
in seconds
1: 5
2: 15 (default)
Alarm response times of Dräger Flame 2500 and
Dräger Flame 2700
Alarm response times for a standard fire are as follows:
Sensitivity level Response time
in seconds
1: 15
2: 30 (default)
3: 45
4: 65
Detection distance
in meters (feet)
3 5 (16.4)
5 15 (50)
Detection distance
in meters (feet)
3 15 (50)
5 30 (100)
8 45 (150)
10 65 (215)