Orion Instruments Eclipse 705 - Manual (Page 35)

35 57-600 Eclipse ® Guided Wave Radar Transmitter
2.7 Configuration Using HART
A HART (Highway Addressable Remote Transducer)
remote unit, such as a HART communicator, can be used
to provide a communication link to the ECLIPSE transmitter.
When connected to the control loop, the same system
measurement readings shown on the transmitter are shown
on the communicator. The communicator can also be used
to configure the transmitter.
The HART communicator may need to be updated to include
the ECLIPSE software (Device Descriptions). 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 it to a remote junction or by con-
necting it directly to the terminal block in the electronics
housing of the ECLIPSE transmitter.
HART uses the Bell 202 frequency shift keying technique
of high-frequency digital signals. It operates on the 4–20
mA loop and requires 250
Ω load resistance. A typical
connection between a communicator and the ECLIPSE
transmitter is shown at left.
2.7.2 Display Menu
A typical communicator display is an 8-line by 21-character
LCD. When connected, the top line of each menu displays
the model (Model 705 3.x) 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 infor-
mation, refer to the instruction manual provided with the
HART communicator.
The ECLIPSE transmitter online menu trees are shown in
the following illustration. Open the menu by pressing the
alphanumeric key 1, Device Setup, to display the second-
level menu.
+ -
Junction
R
L
> 250 Ω
Control
Room
Display
Power
Supply
Current
Meter