Emerson Rosemount 975MR Reference Manual page 24

Introduction
August 2019
Table 1-13: Results of an Unsuccessful Built-in Test
Output
BIT procedure
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
and Table
Table 1-14: Results of a Successful Manual Built-in Test
Output
Fault relay
Alarm relay
Auxiliary relay
0-20 mA output
Power LED
Table 1-15: Results of an Unsuccessful Manual Built-in Test
Output
Fault relay
0-20 mA output
Power LED
Manual built-in test only selected
The built-in test is initiated manually by momentarily selecting Terminal Number 3 with
Terminal Number 2 or a switch across these terminals in a safe area.
24
1-15.
Result
• Output configurations 1A, 2A, and 1R: remain CLOSED
(Normal).
• Output configurations 3A and 2R: remain OPEN (Normal).
Activated for three seconds (only when the function Alarm BIT is
set to YES).
For output configurations 1R and 2R, is activated for three
seconds (only when the function Auxiliary BIT is set to YES).
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.
Green, flashing, 1 Hz
Result
• Output configurations 1A, 2A, and 1R: change to OPEN.
• Output configurations 3A and 2R: change to CLOSED.
Output configurations 1A, 2A, and 3A: indicates BIT Fault (2 mA)
Yellow, flashing, 4 Hz
(continued)
Result
Performed every one minute
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Reference Manual
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Table 1-14