Spectrex 20/20MU - Mini Flame Detector - Manual (Page 38)

Spectrex Inc. - SharpEye TM ML & MU Flame Detector Manual – TM 767100, Rev. A, April 2005
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7.4.1 Manual BIT Test
Momentarily connecting PIN number 11 or yellow wire with PIN 2 or black wire
performs manual BIT.
Important Note!
If the function setup “Alarm BIT” is at YES, then the Alarm and 4-20mA Output will
be activated during a manual BIT Therefore, automatic extinguishing systems or
any external devices that may be activated during BIT must be disconnected.
1
Verify that the detector is operating properly.
2 Initiate manual BIT. After a few seconds the following occurs:
• Alarm Relay will be activated and the 4-20mA output turns to 20mA for 3
seconds (only if “Alarm BIT” at YES).
• The LED should light constant red for 3 seconds.
• Fault Relay should stay N.O during the test.
7.4.2 Testing with Fire Simulator Model 20/20-311 (see Appendix B)
This test simulates an exposure of the detector to a real fire condition. The
detector is exposed to radiation at the required detection level. As a result the
detector must generate a Fire Alarm signal.
Important Note!
If the detector is exposed to a fire simulator, the Alarm Relay and 4-20mA will be
activated during the simulation. Therefore, automatic extinguishing systems or
any external devices, which may be activated during this process, must be
disconnected.
1
Apply power to the system and wait up to 60 seconds for detector to turn to
normal state and the LED flashes (1 Hz) green. If the detector is on, skip this
step.
2 Aim the Spectrex Fire Simulator Model 20/20-311 at the target point of the
detector (see Fig. 15), in a way that the radiation emitted by it is facing
directly towards the detector. (See appendix B)
3 Press the operation button once. After few seconds,
• The LED should light steady red for a few seconds.
• The 4-20mA output should turn to 20mA for a few seconds and then
return to 4mA.
• The Alarm Relay should also turn on during this period.
This completes the installation procedure. The detector and system are now ready
for operation.