Spectrex 20/20SI Triple IR (IR3) Flame Detector - Manual (Page 20)

Spectrex Inc. - SharpEye TM IR3 Flame Detector Manual – TM 20/20I, Rev. (6) August 2004
12
4.3.1 Function switch (SW1):
The user can select the desired mode of operation by means of this switch
according to table 6:
Table 6: 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 7 below
(default) Sensitivity range - see table 7
7* Sensitivity range - see table 7 below Sensitivity range - see table 7
(default)
8 Accessory relay used as End Of
Line. Accessory relay operates in
accordance with the settings of
SW1(default)
* See Table 7 for sensitivity range setting.
Table 7: Sensitivity range
Sensitivity Range SW1-7 SW1-6
1 (lowest) 50 ft (15m) OFF OFF
2 100 ft (30m) OFF ON
3 150ft (45m) ON OFF
4 (highest) 200ft (60m) ON ON