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820-0003
IPES IR3 Flame Detector
Operating Manual
Page
23
of
37
Photonic Detector
Locations
Dust/ Obstruction
Fault Test
Simulation of dust or obstruction on optical wi
ndow of the IPES‐IR3 is done by placing a non‐transparent mate
rial with
good reflective properties (white sheet of paper) in front of the optical window of IR channel for 15‐20 sec.
If the Dust/obstruction detection function is working properly, the FAULT Relay will activate (Open) and the status LED
will alternate
YELLOW‐GREEN to indicate the fault.
When the obstruction is removed, the status indicator will return to the GREEN‐ Operational State
and the Fault Relay
will return to the normal closed state.