Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004
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4.3.2 Alarm Delay Switch (SW2) – default 5 sec.
The detector is equipped with different Alarm Delay options. It provides
programmable time delays of 0 to 30 seconds with eight (8) fixed settings at: 0, 3,
5, 10, 15, 20, 25 and 30 seconds, using SW2 switches 1-3. (See Table 5.) When
an Alarm (Detection) level condition is encountered, the detector delays
execution of the Alarm Relay and the 4-20mA output by the specified period of
time. The detector will then evaluate the condition for required delay period. If the
Alarm level is still present, the Alarm indications return to its standby state.
Table 5. SW2 Alarm Delay Setting
Delay
SW2 switches
(seconds)
4
3
2
1
0
N/A
Off
Off
Off
3*
N/A
Off
Off
On
5
N/A
Off
On
Off
10
N/A
Off
On
On
15
N/A
On
Off
Off
20
N/A
On
Off
On
25
N/A
On
On
Off
30
N/A
On
On
On
* Default
Note
: The new FM approval from January 2003 does not allow use of 20, 25 and
30-second delay settings.
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