Visual Indicators - Dräger Flame 2000 Notice D'utilisation

2.2.5

Visual indicators

One 3-color status LED is located inside the detector window. The
statuses are as follows:
Detector status LED color
Normal Green
Yellow
1)
Fault, BIT fault
Warning Red
Alarm Red
1) Built-in test
For more information on the detector status, please refer to the
Technical Manual.
2.2.6 Internal tests
During normal operation, the flame detector performs the following self
tests:
Continuous feature test (performed automatically)

This test complies with SIL-2 requirements. The flame detector
continuously tests:
Input voltage level

All internal regulator voltage levels

Voltage level status of sensor and sensor circuitry for noise or

disconnection in the electronic circuitry
0-20 mA output level

Relays and heater operation

Processor watch dog

Software

Memory

Oscillator frequency


LED mode
1 Hz - flashing
Any failure is indicated by:
4 Hz - flashing

2 Hz - flashing
Steady


If the BIT was not successful, it is then automatically performed every
minute. This continues, until a successful BIT occurs and the flame
detector resumes normal operation. The fault indication remains until
power is disconnected from the flame detector. The fault indication
returns if the fault is still found when power is restored.
BIT (performed automatically every 15 minutes, but may also be
performed manually)
The BIT checks the following:
Electronics circuitry

Sensors

Window cleanliness

Fault relay:
Opens in wiring option 1, 2, and 4

Closes in wiring option 3 and 5

Status LED: Flashes yellow (4 Hz)
0-20 mA output: indicates fault (0 mA) or BIT fault (2 mA) in wiring
option 1, 2, 3
en
Description
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