Emerson Rosemount 975HR, Reference Manual

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Table 1-10: Results of an Unsuccessful Built-in Test
Output Result
Fault relay • Output configurations 1A, 2A, and 1R:
change to OPEN
• Output configurations 3A and 2R: change to
CLOSED
0-20 mA output Output configurations 1A, 2A, and 3A: BIT Fault
(2 mA)
Power LED Yellow, flashing, 4 Hz
BIT procedure Performed every one minute
Manual built-in test
To intiate the built-in test manually, momentarily connect Terminal 3 to Terminal 2 (or a
switch across these terminals in a safe area).
The results of a successful and unsuccessful manual built-in test are listed in Table 1-11
and Table 1-12 .
Table 1-11: Results of a Successful Manual Built-in Test
Output Result
Fault relay • Output configurations 1A, 2A, and 1R: remain CLOSED
(Normal).
• Output configurations 3A and 2R: remain OPEN (Normal).
Alarm relay Activated for three seconds (only when the function Alarm BIT is
set to YES).
Auxiliary relay For output configurations 1R and 2R, is activated for three
seconds (only when the function Auxiliary BIT is set to YES).
0-20 mA output Output configurations 1A, 2A, and 3A:
• Initiates 20 mA only when the function Alarm BIT is set to
YES.
• Initiates 16 mA when the function Auxiliary BIT is set to YES
and the function Alarm BIT is set to NO.
Power LED Green, flashing, 1 Hz
Table 1-12: Results of an Unsuccessful Manual Built-in Test
Output Result
Fault relay • Output configurations 1A, 2A, and 1R: change to OPEN.
• Output configurations 3A and 2R: change to CLOSED.
0-20 mA output Output configurations 1A, 2A, and 3A: indicates BIT Fault (2 mA)
Power LED Yellow, flashing, 4 Hz
Reference Manual Introduction
00809-0100-4976 June 2021
Rosemount 975HR 27
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