Performing Transmitter Tests - Emerson Rosemount 3051 Reference Manual

Reference Manual
00809-0100-4007
2.11

Performing transmitter tests

2.11.1 Verifying alarm level
If the transmitter electronics board, sensor module, or LOI/ LCD display is repaired or
replaced, verify the transmitter alarm level before returning the transmitter to service.
This is useful in testing the reaction of the control system to a transmitter in an alarm
state, thus ensuring the control system recognizes the alarm when activated.
To verify the transmitter alarm values, perform a loop test and set the transmitter output
to the alarm value (see
Note
Before returning transmitter to service, verify security switch is set to the correct
configuration. Refer to
2.11.2 Performing an analog loop test
The analog loop test command verifies the output of the transmitter, the integrity of the
loop, and the operations of any recorders or similar devices installed in the loop. Emerson
recommends that you verify the 4-20 mA points in addition to alarm levels when installing,
repairing, or replacing a transmitter.
CAUTION
Improper assembly
Improper assembly of manifolds to traditional flange can damage sensor module.
Severe changes in the electrical loop may inhibit HART
reach alarm values. Therefore, Rosemount cannot absolutely warrant or guarantee that
the correct Failure alarm level (High or Low) can be read by the host system at the time
of annunciation.
The host system may provide a current measurement for the 4–20 mA HART output. If it
does not, connect a reference meter to the transmitter by either connecting the meter to
the test terminals on the terminal block or shunting transmitter power through the meter
at some point in the loop.
Perform an analog loop test using a Field Communicator
From the HOME screen, enter the Fast Key sequence.
Device Dashboard Fast Keys
Reference Manual
Table 2-5 and Table 2-7).
Verify configuration.
3, 5, 1
Configuration
August 2019
®
communication or the ability to
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