18
3.5.4
Built-in-Test (BIT)
The detector has the self diagnosis function to check whether sensors are detectable
(detection of internal circuitry or sensor itself) for radiant energy as well as cleanliness
of transmission windows. If there are some fault on the internal circuit or decrease of
transmission intensity with obscured glass from oil vapor or dust, the detector will
output the self-diagnosis fault signal.
SW1
Switch Setting
SW1-6
Off
ON
Function
Self-diagnosis function “OFF”
Self-diagnosis function “ON”
- The detector will self test every 12 hours
3.5.5
Relay Output
Warning Relay Output
The detector can indicate a warning state with a warning relay output. In the warning
relay enabling setting, if the detector is in the warning state, the warning relay contacts
are used. This setting can be disabled to save power
SW1
Switch Setting
SW1-7
Off
ON
Function
Warning relay Disabled (default)
Warning relay Enabled
3.5.3
Alarm Delay
The SafeFlame is equipped with an Alarm delay option, which provides programmable
time delays by changing settings. The alarm signal will be activated if the fire still exists
after the programmed delay time. But if the fire disappears within the programmed
delay time, the detector will return to its standby state.
The alarm delay option affects the output relays and the 0-20mA. The LEDs and the
outputs indicate warning levels during the delay time only if the fire doncition exists.
SW1
Switch Setting
SW1-3
Off
ON
Delay Time (sec)
3
6
Off
ON
SW1-4
Off
Off
ON
ON
9
12
Note: When setting the delay time to 5, the average response time is about 12 seconds for a 1’ x 1’ n-Heptane
pan flame at 197ft(60m)
SafeFlame Installation and Operation Manual
(Publication#: MA-SF200OM)