Spectrex 20/20R - Single IR Flame Detector - Manual (Page 19)

Spectrex Inc. - SharpEye TM Single IR Flame Detector Manual – TM 20/20R, Rev. A January2005
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4.3.1 Function switch (SW1):
The user can select the desired mode of operation by means of this switch
according to table 5:
Table 5: Function Switch SW1
SW. ON Position OFF Position
1 Alarm latching - enabled Alarm latching – disabled (default)
2 Accessory relay activated at warning
level Accessory relay activated at
detection level (together with Alarm
relay) - (default)
3 Automatic & manual BIT (default) Manual BIT only
4 Successful manual BIT activates the
Alarm relay and the 4-20mA output
turns to 15mA for approximately 3
seconds (default) Successful manual BIT does not
activate the Alarm relay.
5 Successful manual BIT activates the
accessory relay and the 4-20mA
output turns to 10mA for
approximately 3 seconds (default) Successful manual BIT does not
activate the Accessory relay.
6* Sensitivity range – see table 6 below
(default) Sensitivity range - see table 6
7* Sensitivity range - see table 6 below Sensitivity range - see table 6
(default)
8 Accessory relay used as End Of
Line. Accessory relay operates in
accordance with the settings of
SW1(default)
* See Table 6 for sensitivity range setting.
Table 6: Sensitivity range
Sensitivity Range SW1-7 SW1-6
1 (lowest) 16.5 ft (5m) OFF OFF
2 (highest) 50 ft (15m) OFF ON