Spectrex 20/20CTIN-CTIP Flame Detector - Manual (Page 23)

Spectrex Inc. - SharpEye TM CCTV Model Flame Detector Manual – TM 788100, Rev. A January 2005
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4.3.3 Alarm Delay
The detector is equipped with an Alarm Delay option, which provides
programmable time delays of 0 to 30 seconds with eight (8) fixed settings at: 0,
anti-flare, 3, 5, 10, 15, 20, and 30 seconds.
When an Alarm (Detection) level condition is encountered, the detector delays the
execution of the Alarm output’s relay by the specified period of time. The detector
will then evaluate the condition for 3 seconds. If the Alarm level is still present, the
Alarm outputs will be activated. If this condition no longer exists, the detector will
return to its standby state. The Alarm delay option will affect the output relay and
the 4-20mA. The LEDS will indicate warning level during the delay time only if the
fire condition exists.
Anti Flare
Anti Flare mode is selected to prevent false alarm in locations where fast flares
may be present. The Time delay for fire alarm in this mode is from 2.5 to 15
seconds (mostly less than 10 seconds).
Table 10: Time delay
Delay (sec.)
0
A* -- anti-flare
3
5
10
15
20
30
* Default
4.3.4 Addresses Setup
Refer to TM 784050 for instructions for defining the addresses of the detectors.
The detector provides up to 247 addresses that can be used with RS-485
communication link.