Principles Of Operation; Simulator Status - Emerson Rosemount FS-HR-975 User Manual

Introduction
1.3

Principles of operation

The FS-HR-975 emits IR energy, which is filtered to emit electromagnetic radiation in a
unique sequential pattern, corresponding to and recognizable as a fire by the Rosemount
975HR Flame Detector. The simulator includes a reflector which accumulates the IR
energy and directs it towards the detector.
The FS-HR-975 includes a laser diode and a sight in order to point the simulator to the
center of the flame detector.
1.4

Simulator status

For the first five seconds, the laser defines the simulator status.
Normal status
At normal, the laser turns on constantly for five seconds before the IR radiation turns on.
These five seconds are used to aim the simulator to the center of the detector before the
IR radiation turns on. The IR radiation turns on for fifty seconds. After these fifty seconds,
the IR radiation turns off, and the simulator cannot be operated for a further twenty
seconds (delay between activations).
Fault status
1.
2.
3.
2
Low battery - The laser flashes three times, stops flashing for a few seconds, flashes
three more times, stops flashing, and flashes three more times.The IR radiation will
be activated.
IR fault - The laser flashes five times, stops flashing for a few seconds, flashes five
more times, stops flashing, and flashes five more times. The IR radiation will not be
activated.
Total failure - The laser does not turn on. The IR radiation will not be activated.