Spectrex 20/20SI Triple IR (IR3) Flame Detector Bedienungsanleitung PDF herunterladen (Seite 43)

Spectrex Inc. - SharpEye

IR3 Flame Detector Manual – TM 20/20I, Rev. (6) August 2004

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 operated 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 produced 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 20/20-310 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 to

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.

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Spectrex 20/20SI Triple IR (IR3) Flame Detector Bedienungsanleitung Seite 43