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IM 1F6A0-01E
5-13
5. BASIC OPERATING PROCEDURES
5.6 Operation for HART
Communicator
The communication control function with HHT, BRAIN
Terminal (BT200) is stated at Chapter 5, “PARAMETER
SETTING IN “BRAIN” COMMUNICATIONS”. YEWFLO
has not only BRAIN Terminal (BT200) but also HART
Communicator as remote control via HHT.
Main functions and parameters are the same with BRAIN
Terminal (BT200). Moreover, YEWFLO has unique
parameters of HART Communicator.
Note: HART is a registered trademark of the HART
Communication Foundation.
NOTE
In case of using HART Communicator, setting
from indicator is not available.
CAUTION
In case of using Burst mode , setting from AMP. unit
is not available.
The amplifier has been pre-configured at the factory, so no
set-up should be required prior to installation. If your process
conditions have changed and re-programming is required, the
menu/parameter configuration list for YEWFLO can be
found in 5.6.10 Menu Tree. Refer to the instructions provided
with your HART communicator for operation details. The
QUICK START section of this manual will address only
those parameters which must be set to establish the operation
of the meter for a particular application. The Menu Tree will
cross-reference the BRAIN parameters to the corresponding
HART parameters.
5.6.1 Hardware Recommenation
Communicaton distance :
Up to 1.5km, when using multiple twisted pair cables.
Communication distance varies depending on type of
cable used.
Cable length for specific applications:
Use the following formula to determine cable
length for a specific application;
65
×
10
6
(R
×
C)
L =
–
(Cf+10000)
C
Where:
L = length in feet or meters
R = resistance in ohms, current sense resistance
C = cable capacitance in pF/ft of pF/m
Cf= maximum shunt capacitance of reciving devices in
pF/m