Chapter 3 Operation; Power Up The Detector; Test Flame Detectors - Emerson Rosemount 975 Series Reference Manual

Reference Manual
00809-1400-4975
3 Operation
3.1

Power up the detector

Procedure
After connecting the detector to power, wait up to 60 seconds for the detector to
completed the initial start-up procedure.
Note
Turning on the detector initiates the following sequence of events:
a. The yellow light-emitting diode (LED) flashes at 4 Hz.
b. The built-in test (BIT) is executed.
c. BIT completes.
d. Detector enters Normal mode, indicated by:
3.2

Test flame detectors

You can use the Rosemount flame simulators to test the Rosemount 975 flame detectors.
You can also use the manual built-in text (BIT) to test the flame detectors.
Table 3-1: Flame simulator compatibility
Rosemount flame simulator model
FS-HR-975
FS-IR-975
FS-UVIR-975
To test a flame detector:
Procedure
1. Power up the system and wait for up to 60 seconds for the detector to return to
2. Ensure all indicators show Normal.
Postrequisites
For full instructions on testing with a flame simulator, see the relevant Reference Manual.
Rosemount 975
• Flashing green LED at 1 Hz.
• Fault relay contacts closing.
• mA output is 4 mA (for models featuring analog [voltage] output, this will be 2
V).
normal status.
The Power light-emitting diode (LED) turns on.
Rosemount 975 flame detector model
Rosemount 975HR
Rosemount 975MR
Rosemount 975UF and 975UR
Operation
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