Commissioning On The Bench With Hart; Setting The Loop To Manual - Emerson Rosemount 3051S Series Reference Manual

Rosemount 3051S Series
COMMISSIONING ON
THE BENCH WITH HART
Setting the Loop to
Manual
3-2
Commissioning consists of testing the transmitter and verifying transmitter
configuration data. 3051S transmitters can be commissioned either before or
after installation. Commissioning the transmitter on the bench before
installation using a 375 Field Communicator or AMS ensures that all
transmitter components are in working order.
To commission on the bench, required equipment includes a power supply, a
milliamp meter, and a HART Communicator or AMS. Wire equipment as
shown in Figure 3-1 and Figure 3-2. Verify transmitter terminal voltage is
between 10.5 - 42.4 Vdc. To ensure successful communication, a resistance
of at least 250 ohms must be present between the HART Communicator loop
connection and the power supply. Connect the HART Communicator leads to
the terminals labeled "COMM" on the terminal block. (Connecting across the
"TEST" terminals will prevent successful communication.)
Set all transmitter hardware adjustments during commissioning to avoid
exposing the transmitter electronics to the plant environment after installation.
Refer to "Configure Security and Alarm" on page 2-13.
When using a HART Communicator, any configuration changes made must
be sent to the transmitter by using the "Send" key (F2). AMS configuration
changes are implemented when the "Apply" button is clicked.
Whenever sending or requesting data that would disrupt the loop or change
the output of the transmitter, set the process application loop to manual. The
HART Communicator or AMS will prompt you to set the loop to manual when
necessary. Acknowledging this prompt does not set the loop to manual. The
prompt is only a reminder; set the loop to manual as a separate operation.
Reference Manual
00809-0100-4801, Rev CB
January 2007