3600I
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1.6.2.2 AUTOMATIC
BIT
The detector automatically performs a BIT every 15 minutes. A successful BIT
sequence does not activate any indicator.
The results of a successful and unsuccessful BIT are listed in Table 10 and Table 11.
Table 10: Results of a Successful BIT
Output
Result
Fault relay
•
Model 1XXX, 2XXX, 4XXX Wiring options 1, 2, 4: remains
CLOSED
•
Model 3XXX, 5XXX 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
1.6.2.3 MANUAL
BIT
The BIT is manually initiated by momentarily connecting Terminal 3 with Terminal 2 (or
a switch across these terminals in the safe area).
If the BIT is unsuccessful, all outputs will function as described for Automatic BIT, but
the BIT is now automatically executed every 1 minute. This continues until a successful
BIT occurs, when the detector will resume normal operation.
The results of a successful and unsuccessful Manual BIT are listed in
Table 12 and Table 13.