Spectrex 20/20MPI - Commercial IR3 Flame Detector - Manual (Page 28)

SharpEye TM IR3 Flame Detector User Guide
16 User and Maintenance Manual
4.3 Detector Mode Setup
4.3.1 Detector Setting
Refer to Detector Default Setup on page 18 for default factory settings.
The detector incorporates several functions that can be set by the customer
using Spectrex Host software, which is supplied for each detector shipment,
(refer to manual TM768050 for programming instructions). The Host
software enables you to change functions as described in Detector on
page 16.
4.3.2 Detector Functions
4.3.2.1 Sensitivity Ranges
The detector offers four (4) sensitivity settings. The settings refer to the
gasoline fire of 1 ft
2 from 33 ft. (10 m) to 140 ft. (43m). Detection distances
for other fuels vary.
4.3.2.2 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:
 0 seconds
 Anti-flare
 3 seconds
 5 seconds
 10 seconds
 15 seconds
 20 seconds
 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 then evaluates the condition for 3 seconds. If the Alarm
level is still present, the Alarm outputs are activated. If this condition no
longer exists, the detector returns to its standby state. The Alarm delay
option affects the alarm relay and the 0-20 mA output. The LED indicates
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).