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Reference Manual
00809-0100-4027, Rev AA
December 2005
Rosemount 4500
3-2
COMMISSIONING ON
THE BENCH WITH HART
Commissioning consists of testing the transmitter and verifying transmitter
configuration data. 4500 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, connect the transmitter and the HART
Communicator or AMS as shown in Figure 3-1. Make sure the instruments in
the loop are installed according to intrinsically-safe or nonincendive field
wiring practices before connecting in an explosive atmosphere. Connect
HART Communicator leads at any termination point in the signal loop.
For 4–20 mA transmitters, the power supply must provide 11.25 to 30 V dc at
the transmitter. To enable communication, a resistance of at least 250 ohms
must be present between the HART Communicator loop connection and the
power supply. Do not use inductive transient protectors with the 4500.
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.
For more information on the 375 Field Communicator see document
00809-0100-4276. AMS help can be found in the AMS on-line guides within
the AMS system.
Setting the Loop to
Manual
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.