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Settings
Fire Threshold
EN54-12 Threshold Selection: Only the
25% and 35% thresholds are approved. Both
are suitable for separations of 5m to 120m.
UL268 Threshold Selection: Select the
correct threshold for the installed distance:
Threshold SW5 SW6
25% On On
35% Off Off
55% On Off
85% Off On
If Latching Mode is selected, the detector will
remain in Fire Alarm condition even after the
signal has recovered to its normal level. To
select Latching Mode move the Latching Mode
switch to the On position.
Separation between
Detector and Reflector
Acceptable
Alarm
Thresholds
<25ft (<7.5m) 25%
25 – 55ft (7.5 – 16.5m) 25%, 35%
55 – 110ft (16.5 – 33.5m) 35%, 55%
110 – 175ft (33.5 – 53m) 55%, 85%
175 – 394ft (53 – 120m) 85%
External Reset
Latching Mode
External Reset can be used to clear a latched
fire alarm condition, which will be cleared
when the voltage on the External Reset
connection goes high or low, i.e. from 0V to
a voltage greater than 5V, or from a voltage
greater than 5V to 0V.
Alternatively, remove power from the detector
for at least 10 seconds.
Successful alignment of the Detector will check
correct operation of the Detector and its
sensitivity level.
UL Sensitivity Acceptance Test
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