Spectrex 40/40M Multi IR Flame Detector - Manual (Page 29)

TM 40/40M, Rev (6) July 2013
Internal Detector Tests 17
1.6.2.2 Automatic BIT
The detector automatically performs a BIT every 15 minutes. A successful
BIT sequence does not activate any indicator.
All outputs of BIT results will function as described in Table 10 and Table 11,
and the BIT will be automatically executed every 1 minute.
This continues until a successful BIT occurs, when the detector resumes
normal operation.
Table 10: Results of a Successful BIT
Output Result
Fault relay  Wiring options 1, 2, 4: remains CLOSED
 Wiring options 3 and 5: remains OPEN
0-20mA
output Wiring option 1, 2, 3: Normal (4 mA)
Power LED Green, Flashing, 1 Hz On (Normal)
Table 11: Results of an Unsuccessful BIT
Output Result
Fault relay  Wiring option 1, 2, 4: changes to Open
 Wiring option 3 and 5: changes to Closed
0-20mA output Wiring option 1, 2, 3: BIT Fault (2mA)
Power LED
Yellow, Flashing, 4 Hz
BIT procedure Performed every 1 minute