3.5
Configuration Using HART
A HART (Highway Addressable Remote Transducer)
remote unit, such as a HART handheld terminal (HHT)
can be used to provide a communication link to the
Digital ES II Modulevel Transmitter. When connected to
the control loop, the same system measurement readings
shown on the transmitter are shown on the HHT. In addi-
tion, the HHT can be used to calibrate the transmitter.
If your HART communicator (HHT) has not been
updated since January 1999, it will need to be updated
to include the ES II Modulevel V2 software (Device
Descriptors). Contact your local HART Service Center
if this is required.
3.5.1 Connections
A HART communicator can be operated from a remote
location by connecting to a remote junction or by con-
necting directly to the (+) and (-) terminal points at TB1
on the amplifier board in the electronics housing of the
Digital ES II Modulevel 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 ohms of minimum load resistance.
A typical connection between a HHT and the Digital ES
II Transmitter is illustrated in Figure 22.
3.5.2 Display Menu
A typical communicator display is an 8 line by 21 charac-
ter LCD. When connected, the top line of each on line
menu displays the model (ES MOD) and its tag number
or address. Usually, the bottom line is reserved for software
defined function keys (F1-F4). For detailed operating
information, consult the instruction manual provided with
the HART communicator.
3.5.3 Basic Field Calibration Using Hart HHC
1. Connect HART HHT per Figure 22.
2. Start up the unit.
3. Refer to the next page for the transmitter online menu.
Open the menu by pressing the alphanumeric key 1,
Device Setup, to display the second level menu.
22
48-618 ES/EZ Modulevel Displacer Level Transmitter (Top Hat Assembly Design)
+
-
ENTER
UP
DOWN
E
R
R
O
R
S
P
A
N
Z
E
R
O
(–)
P2
(+)
P1
®
– TB1 +
E S MODULEVEL
®
5300 BELMONT ROAD,
DOWNERS GROVE, IL 60515,
USA.
HEIKENSSTRAAT 6,
B 9240 ZELE,
BELGIUM.
www.magnetrol.com
REFER TO MODULEVEL MANUAL,
BULLETIN 48-615, FOR
INSTALLATION AND OPERATION
INSTRUCTIONS.
TP1
TP2
J1
05-9123-001
ASSEMBLY PART NO.
Junction
Power
Supply
Control
Room
Display
Current
Meter
Figure 22
Digital ES
II
/HART
Communicator Connections
