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Sensitivity
The detector can be configured to one of five sensitivity levels: very low, low, medium, high and
extreme. The following table lists for each sensitivity setting the maximum distance, in which a
standard H
fire
1
would be reliably detected.
2
Sensitivity level
Very Low
Medium
Extreme
Further details about the response characteristics of the detector at the different sensitivity
settings and fuel types can be found in section 10.
Ultra-Fast Detection
The ultra-fast detection feature allows detection of fireballs and explosions at 40 milliseconds. If
enabled, this feature is independent of other detection algorithms and alarm delays.
Alarm Delay
When a fire is detected, the detector delays the execution of the alarm outputs by the
configured time period. After this time delay, the detector re-evaluates the situation. If a fire is
still detected the alarm outputs are activated.
Alarm Latch
If alarm latch is enabled, the detector outputs will remain active even after a fire is no longer
detected. To reset the detector outputs, the detector must be power cycled or a manual BIT
initiated.
Enable Pre-Alarm 0-20mA
If the Pre-Alarm is enabled and Alarm Delay is greater than 0, the detector 0-20mA output will be
16mA and the red LED will blink in case of a pre-alarm fire condition.
A standard fire is defined as a 32-in Plume of H2 fire, with maximum wind speed of 6.5 ft/s (2
1
m/s).
For more information & technical support:
F-Guard IR3-H2 User Manual
T
3: S
ABLE
ENSITIVITY LEVELS
Detection distance in feet (meters)
Low
High
info@gastech.com
16 (5)
33 (10)
66 (20)
98 (30)
98 (30)
76-M-6010-02-02
23
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