Emerson Rosemount 975HR, Reference Manual

Page: 45 / 80

3.3.1 Automatic built-in test
Check that the indicators show normal conditions.
See Power up .
3.3.2 Manual built-in test
To perform a manual built-in test:
NOTICE
If the function setup Alarm BIT and or Auxiliary BIT are set to YES (default NO), the alarm,
auxiliary relay, and 0-20 mA outputs are activated during a manual built-in test. Therefore,
you must disconnect automatic extinguishing systems or any external devices that may be
activated during the built-in test.
Procedure
1. Verify that the detector is in Normal mode.
2. Initiate the manual built-in test.
The results of succcessful and unsuccessful manual built-in tests are detailed in
Table 1-11 and Table 1-12 .
3.3.3 Test with flame simulator
Use the flame simulator to simulate exposure of the detector to a real fire condition. The
flame simulator exposes the detector to radiation at the required detection level. As a
result, the detector generates a fire alarm signal.
See Flame simulator for more information.
NOTICE
If the detector is exposed to a flame simulator, the alarm and accessory relays and 0-20
mA are activated during the simulation. Therefore, disconnect automatic extinguishing
systems or any external devices that may be activated during this process.
To test the detector with a flame simulator:
Procedure
1. Power up the system and wait up to 60 seconds for the detector to turn to a normal
state.
The power LED turns on.
2. Aim the flame simulator at the target point of the detector, in a way that the
radiation emitted by it is facing directly towards the detector.
See
Flame simulator .
3. Press
Operation
once.
After a few seconds, a successful test shows the results shown in Table 3-2 .
Reference Manual Operating the detector
00809-0100-4976 June 2021
Rosemount 975HR 45
Legacy