Spectrex 40/40R - Single IR Flame Detector - Manual (Page 19)

TM 40/40R, Rev (4) November 2010
Performance Considerations 7
• This test includes functional test, environmental test, EMI/EMC test and
software check.
• For more details see EN54-10 Report No. TE243256.
1.5 Performance Considerations
This section describes performance aspects of the 40/40R and includes:
• Detection Sensitivity, page 7
• Cone of Vision, page 8
• False Alarms Prevention, page 9
• Visual Indicators, page 10
• Output Signals, page 11
• Detector Status, page 12
• Auxiliary Relay as End-of-Line Resistor, page 13
1.5.1 Detection Sensitivity
Detection sensitivity is the maximum distance at which the detector reliably
detects a specific size of fire and typical type of fuel (standard fire).
1.5.1.1 Standard Fire
Defined as a 1ft 2 / 0.1m 2 n-heptane pan fire, with maximum wind speed of
6.5 ft./sec (2 m/sec).
1.5.1.2 Sensitivity Ranges
The detector has two response levels:
• WARNING (Pre-alarm)
• ALARM
The detection distance, for the WARNING level, is approximately 10% higher
than the ALARM distance.
The detection distance for the ALARM level is 50 ft. (15m) from a standard
fire. For some typical ambient conditions the Zeta parameter as defined in
NFPA 72 for the detector is 0.005 (1/meter).
Note: Zeta parameters may vary significantly with changes in temperature,
air pressure, humidity, visibility conditions, and so on.
1.5.1.3 Other Fuels
The detector reacts to other types of fire as follows:
• The baseline fire refers to n-heptane 1ft
2 (0.1m 2 ) and is defined as
100% sensitivity.
• For fuel fire – standard pan fire size: 1 ft 2 (0.1 m 2 ).
• For gas flame - 20 inch (0.5m) high, 8 inch (0.2m) width plume fire.
• Maximum Response Time: 10 sec.