A-15
NOTE
A check (
4
) indicates the basic configuration parameters. At a
minimum, these parameters should be verified as part of the
configuration and startup procedures.
CONNECTIONS AND
HARDWARE
The HART Communicator Model 275 can interface with a flowmeter
from the control room, the instrument site, or any wiring termination
point in the loop through the rear connection panel as shown in Figure
A-2. Do not make connections to the serial port or NiCad recharger jack
in an explosive atmosphere. To communicate, connect the HART
Communicator in parallel with the instrument or load resistor. The
connections are non-polarized. Before connecting the HART
Communicator in an explosive atmosphere, make sure the instruments
in the loop are installed in accordance with intrinsically safe or
nonincendive field wiring practices.
NOTE
The HART Communicator needs a minimum of 250 ohms resistance in
the loop to function properly.
The HART Communicator is not a measurement device and does not need
to be calibrated; it is a communications device through which you can read
and adjust the flowmeter configuration information. All variable outputs
displayed by the communicator are functions of the flowmeter.
Figure A-9.
Rear Connection Panel with Optional
NiCad Recharger Pack.
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