Spectrex 20/20R - Single IR Flame Detector User Manual
Page 42
Spectrex Inc. - SharpEye
TM
Single IR Flame Detector Manual – TM 20/20R, Rev. A January2005
34
7.4.1 Manual BIT Test
Important Note!
If SW1 switches 4 and 5 are in their “ON” position the Alarm, Accessory Relays
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 15mA for
3 seconds (only if SW1-4 is ON).
• Accessory Relay will be activated and the 4-20mA output turns to
10mA for 3 seconds (only if SW1-5 is ON).
• The 2 LEDs should be ON.
• Fault Relay will stay active during the test.
7.4.2 Testing with fire simulator
This test is used to simulate an exposure of the detector to a real fire condition.
The detector is exposed to the radiation in the specified 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 and Accessory Relays 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 turning of the
detector to normal state. Power LED turns on. If the detector is on, skip this
step.
2
Aim the Spectrex Fire Simulator Model 20/20-312 to the target point of the
detector (see Fig. 22), in a way that the radiation emitted by it is facing
directly towards the detector. (See appendix E)
3
Press the operation button once. After few seconds the Alarm LED should be
on for few seconds. The 4-20mA output should turn to 15mA for a few
seconds and then to return to 5mA. The Alarm Relay should also turn on
during this period. The Accessory Relay should respond in parallel to the
Alarm Relay if SW1-4 is OFF.
This completes the installation procedure. The detector and system are now ready
for operation.