50-660 Kotron Model 805 Smart RF Level Transmitter
14
2.7
Configuring and Calibrating the
Transmitter Using HART
A HART (Highway Addressable Remote Transducer)
remote unit, such as a HART 275 handheld communica-
tor, can be used to provide a communication link to the
Model 805 transmitter. When connected to the control
loop, the same system measurement readings shown on
the transmitter are shown on the communicator. In
addition, the communicator can be used to configure
the transmitter.
The HART communicator may need to be updated to
include the Model 805 software (Device Descriptors).
Contact your local HART Service Center for additional
information.
2.7.1 Connections
A HART communicator can be operated from a remote
location by connecting to a remote junction or by con-
necting directly to the terminal block in the electronics
housing of the Model 805 transmitter.
HART uses the Bell 202 frequency shift key technique of
high-frequency digital signals. It operates on the 4–20 mA
loop and requires 250 W of minimum load resistance.
A typical connection between a communicator and the
Model 805 transmitter is illustrated.
2.7.2 HART Display Menu
A typical HART communicator display is an 8-line by
21-character LCD. When connected, the top line of each
online menu displays the model (Model 805) and its tag
number or address. Usually the bottom line of each menu
is reserved for software-defined function keys (F1–F4). For
detailed operating information, refer to the instruction
manual provided with the HART communicator.
The Model 805 transmitter online menu tree is shown in
the following illustration. Open the menu by pressing the
alphanumeric key 1, Device Setup, to display the second-
level menu.
2.7.3 HART Device Description (DD)
Device Version 1 (Dev v1), Device Description 2
(DD v2) was registered with HART Communication
Foundation in May, 1999 and is available on the
CD-ROM 1999–2 issued in July, 1999.
+
+
-
-
Junction
R
L
> 250
Control
Room
Display
Power
Supply
Current
Meter
