Spectrex 20/20CTIN-CTIP Flame Detector - Manual (Page 25)

Spectrex Inc. - SharpEye TM CCTV Model Flame Detector Manual – TM 788100, Rev. A January 2005
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D. Automatic & Manual BIT
Manual Bit
Functions as described in paragraph 4.4.c. In the case of an unsuccessful BIT all
outputs will function as described in paragraph 4.4.c, but the BIT will be
automatically executed every 1 minute. This mode of operation will continue until
successful BIT has been encountered. As a result, the detector will resume its
normal operation.
Automatic BIT
The detector automatically performs a BIT every 15 minutes.
A successful BIT sequence does not activate any indication:
The FAULT relay is CLOSED (NORMAL).
The POWER LED is ON (NORMAL).
An unsuccessful BIT sequence activates the following:
The FAULT relay
is opened
4-20mA output indicate BIT FAULT (2 mA)
The POWER LED (yellow) flashes (4 Hz)
BIT procedure will be performed every 1 minute