Spectrex 20/20MI - Mini Triple IR (IR3) Flame Detector - Manual (Page 26)

Spectrex Inc. - SharpEye TM Mini IR3 Flame Detector Manual – TM 787100, Rev. D April 2011
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c. Function Setup
The user can select the desired mode of operation by means of host.
Table 11: Function Setup
Name Yes No
1 Alarm Latch Alarm latching enable Alarm latching disable
(default)
2 Automatic BIT Automatic & manual BIT
(default) Manual BIT only
3 Alarm BIT Successful Manual BIT
activates the Alarm Relay for
approximately 3 seconds; the
4-20mA will provide 15mA for
3 sec Successful manual BIT
does not activate the
Alarm Relay (default)
d. Addresses Setup
Refer to TM 784050 for instructions for defining the addresses of the
detectors. The detector provides up to 247 addresses (from 1 to 247) that
can be used with RS-485 communication link.
4.3.3. Detector Default Set Up
The detector has five (5) functions that can be programmed according to customer
requirement at factory or at customer facility using software Host. The standard set
up (default) that the detector is programmed to if there are no specific
requirements are as follows:
Table 12: Default function set up
Detector default set up: 20/20MI-1 20/20MI-3
Sensitivity 20 5
Delay A A
Alarm Latch NO NO
Automatic BIT YES YES
Alarm BIT NO NO
4.4 Built In Test
4.4.1. General
The detectors’ Built In Test (BIT) checks the following:
• Electronics circuitry
• Sensors
• Window cleanliness
The detector can be set to perform the BIT automatically and manually or
manually only.