Manual

TM 40/40R, Rev (4) November 2010
Internal Detector Tests 15
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 8 and
Table 9.
Table 8: 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 9: 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 10 and Table 11.